SIST EN ISO 10683:2014
(Main)Fasteners - Non-electrolytically applied zinc flake coatings (ISO 10683:2014)
Fasteners - Non-electrolytically applied zinc flake coatings (ISO 10683:2014)
EN ISO 10683 specifies requirements for non-electrolytically applied zinc flake coatings for steel fasteners. It applies to coatings: - with or without hexavalent chromium; - with or without top coat; - with or without lubricant (integral lubricant and/or subsequently added lubricant). National regulations for the restriction or prohibition of certain chemical elements should be taken into account in the countries or regions concerned. It applies to bolts, screws, studs and nuts with ISO metric thread, to fasteners with non-ISO metric thread, and to non-threaded fasteners such as washers, pins, clips, etc.
Verbindungselemente - Nichtelektrolytisch aufgebrachte Zinklamellenüberzüge (ISO 10683:2014)
Die vorliegende Internationalen Norm legt Anforderungen an nichtelektrolytisch aufgebrachte Zinklamellenüberzüge
für Verbindungselemente aus Stahl fest. Die Norm gilt für folgende Überzüge:
- mit oder ohne Chromat;
- mit oder ohne Deckschicht;
- mit oder ohne Schmierstoff (integrierter und/oder nachträglich aufgebrachter Schmierstoff).
ANMERKUNG 1 Nationale Vorschriften für die Einschränkung oder das Verbot bestimmter chemischer Elemente sollten
in den betreffenden Ländern oder Regionen berücksichtigt werden.
Die Norm gilt für Schrauben und Muttern mit metrischem ISO-Gewinde, für Verbindungselemente mit
nichtmetrischem Gewinde und Verbindungselemente ohne Gewinde, wie z. B. Scheiben, Stifte und Clips.
ANMERKUNG 2 Überzüge nach dieser Internationalen Norm werden besonders bei hochfesten Verbindungselementen
(> 1 000 MPa) verwendet, um das Risiko einer Wasserstoffversprödung (siehe 4.4) zu vermeiden.
Hinweise zur konstruktiven Ausführung und der Montage beschichteter Verbindungselemente sind in
Anhang A aufgeführt.
Die vorliegende Internationale Norm legt keine Anforderungen an Eigenschaften von Verbindungselementen
wie Schweißbarkeit oder Lackierbarkeit fest. Sie gilt nicht für mechanisch aufgebrachte Zinküberzüge.
Éléments de fixation - Revêtements non électrolytiques de de zinc lamellaire (ISO 10683:2014)
L'ISO 10683:2014 spécifie les exigences relatives aux revêtements non électrolytiques de zinc lamellaire pour les fixations en acier. Elle s'applique aux revêtements:
avec ou sans chrome hexavalent;
avec ou sans finition «top coat»;
avec ou sans lubrifiant (lubrifiant intégré et/ou lubrifiant additionnel).
Elle s'applique aux vis, goujons, tiges filetées et écrous à filetage métrique ISO, aux fixations à filetage non métrique ISO et aux fixations non filetées telles que les rondelles, les goupilles, les clips, etc.
L'ISO 10683:2014 ne spécifie aucune exigence pour les caractéristiques des fixations telles que la soudabilité ou l'aptitude à la peinture. Elle ne s'applique pas aux revêtements de zinc appliqués mécaniquement.
Vezni elementi - Cinkova lamelna prevleka, ki ni izdelana z elektrolizo (ISO 10683:2014)
Standard EN ISO 10683 določa zahteve za cinkovo lamelno prevleko, ki ni izdelana z elektrolizo, za vezne elemente. Uporablja se za prevleke: - s heksavalentnim kromom ali brez njega; - s premazom ali brez njega; - z mazivom ali brez njega (vdelano mazivo in/ali mazivo, ki je dodano pozneje). V zadevnih državah ali regijah naj bi upoštevali nacionalno zakonodajo o omejitvah ali prepovedi določenih kemijskih elementov. Velja za vijake in matice z ISO metričnim navojem, vezne elemente z metričnimi navoji, ki niso del ISO, in za vezne elemente brez navojev, kot so podložke, zatiči, objemke itd.
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN ISO 10683:2014
01-september-2014
1DGRPHãþD
SIST EN ISO 10683:2002
Vezni elementi - Cinkova lamelna prevleka, ki ni izdelana z elektrolizo (ISO
10683:2014)
Fasteners - Non-electrolytically applied zinc flake coatings (ISO 10683:2014)
Verbindungselemente - Nichtelektrolytisch aufgebrachte Zinklamellenüberzüge (ISO
10683:2014)
Éléments de fixation - Revêtements non électrolytiques de de zinc lamellaire (ISO
10683:2014)
Ta slovenski standard je istoveten z: EN ISO 10683:2014
ICS:
21.060.01 Vezni elementi na splošno Fasteners in general
25.220.40 Kovinske prevleke Metallic coatings
SIST EN ISO 10683:2014 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN ISO 10683:2014
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SIST EN ISO 10683:2014
EUROPEAN STANDARD
EN ISO 10683
NORME EUROPÉENNE
EUROPÄISCHE NORM
May 2014
ICS 21.060.01; 25.220.40 Supersedes EN ISO 10683:2000
English Version
Fasteners - Non-electrolytically applied zinc flake coatings (ISO
10683:2014)
Fixations - Revêtements non électrolytiques de zinc Verbindungselemente - Nichtelektrolytisch aufgebrachte
lamellaire (ISO 10683:2014) Zinklamellenüberzüge (ISO 10683:2014)
This European Standard was approved by CEN on 17 April 2014.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European
Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national
standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same
status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United
Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2014 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 10683:2014 E
worldwide for CEN national Members.
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SIST EN ISO 10683:2014
EN ISO 10683:2014 (E)
Contents Page
Foreword .3
2
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SIST EN ISO 10683:2014
EN ISO 10683:2014 (E)
Foreword
This document (EN ISO 10683:2014) has been prepared by Technical Committee ISO/TC 2 “Fasteners” in
collaboration with Technical Committee CEN/TC 185 “Fasteners” the secretariat of which is held by DIN.
This European Standard shall be given the status of a national standard, either by publication of an identical
text or by endorsement, at the latest by November 2014, and conflicting national standards shall be withdrawn
at the latest by November 2014.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN ISO 10683:2000.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech
Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece,
Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,
Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.
Endorsement notice
The text of ISO 10683:2014 has been approved by CEN as EN ISO 10683:2014 without any modification.
3
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SIST EN ISO 10683:2014
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SIST EN ISO 10683:2014
INTERNATIONAL ISO
STANDARD 10683
Second edition
2014-05-15
Fasteners — Non-electrolytically
applied zinc flake coatings
Fixations — Revêtements non électrolytiques de zinc lamellaire
Reference number
ISO 10683:2014(E)
©
ISO 2014
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SIST EN ISO 10683:2014
ISO 10683:2014(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2014
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form
or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior
written permission. Permission can be requested from either ISO at the address below or ISO’s member body in the country of
the requester.
ISO copyright office
Case postale 56 • CH-1211 Geneva 20
Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail copyright@iso.org
Web www.iso.org
Published in Switzerland
ii © ISO 2014 – All rights reserved
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SIST EN ISO 10683:2014
ISO 10683:2014(E)
Contents Page
Foreword .iv
Introduction .vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 General characteristics of the coating . 2
4.1 Zinc flake coating systems . 2
4.2 Composition of the systems . 2
4.3 Mechanical and physical properties and curing. 2
4.4 Avoidance of internal hydrogen embrittlement . 3
4.5 Coating systems and coating processes. 3
5 Corrosion protection and testing . 3
5.1 General . 3
5.2 Neutral salt spray test . 3
5.3 Sulfur dioxide test (Kesternich test) . 4
5.4 Bulk handling, automatic processes such as feeding and/or sorting, storage
and transport . 4
6 Dimensional requirements and testing . 4
6.1 General . 4
6.2 Bolts, screws, studs and nuts with ISO metric threads . 5
6.3 Other fasteners . 6
7 Mechanical and physical properties and testing . 6
7.1 Appearance . 6
7.2 Corrosion resistance related to temperature . 6
7.3 Test methods for thickness or coating weight determination . 6
7.4 Ductility . 7
7.5 Adhesion/cohesion . 7
7.6 Sacrificial cathodic protection . 7
7.7 Torque/tension relationship . 7
7.8 Determination of hexavalent chromium . 8
8 Applicability of tests . 8
8.1 General . 8
8.2 Tests mandatory for each lot . 8
8.3 Tests for in-process control. 8
8.4 Tests to be conducted when specified by the purchaser . 8
9 Designation . 9
9.1 Designation of zinc flake coating systems for the order . 9
9.2 Designation of zinc flake coating systems for labelling . 9
10 Ordering requirements .10
Annex A (informative) Design aspects and assembly of coated fasteners .11
Annex B (informative) Coating thickness and thread clearance for ISO metric screw threads .15
Annex C (informative) Control of the corrosivity of the cabinet for neutral salt spray test for
coated fasteners .22
Bibliography .30
© ISO 2014 – All rights reserved iii
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SIST EN ISO 10683:2014
ISO 10683:2014(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of any
patent rights identified during the development of the document will be in the Introduction and/or on
the ISO list of patent declarations received (see www.iso.org/patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation on the meaning of ISO specific terms and expressions related to conformity
assessment, as well as information about ISO’s adherence to the WTO principles in the Technical Barriers
to Trade (TBT) see the following URL: Foreword - Supplementary information
The committee responsible for this document is ISO/TC 2, Fasteners, SC 14, Surface coatings.
This second edition cancels and replaces the first edition (ISO 10683:2000). The main technical changes
are the following:
— wider application to all types of fasteners and all parties involved, see Introduction, Clause 1, 4.1,
4.3, Clause 7 and Annex A;
— full description of zinc flake coating systems, see 4.1, 4.2 and A.1.2;
— definitions related to coatings for fasteners moved to the new standard ISO 1891-2;
— detailed specification in relation with hexavalent chromium;
— detailed specification concerning pre-treatment in relation with internal hydrogen embrittlement,
see 4.4;
— precedence of corrosion resistance over thickness, see 5.2 and 5.3;
— extended range of properties for coatings and related test methods (including Kesternich test,
thickness and weight determination, torque/tension relationship, determination of hexavalent
chromium), see 5.3, 7.3, 7.7, 7.8 and A.2;
— consideration related to bulk handling, automatic processes, storage and transport, see 5.4 and A.4;
— alternatives for gaugeability and assemblability/mountability, see 6.2.2;
— revised arrangement of tests to be carried out for each lot, for in-process control or when specified,
see Clause 8;
— revised designation for coating systems and addition of labelling, see Clause 9;
— consideration related to design aspects and assembly of coated fasteners, see new Annex A;
iv © ISO 2014 – All rights reserved
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SIST EN ISO 10683:2014
ISO 10683:2014(E)
— detailed specification for coating thickness and thread clearance for ISO metric threads, moved to
new Annex B;
— precise control of corrosivity for the salt spray cabinet for coated fasteners, see new Annex C.
© ISO 2014 – All rights reserved v
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SIST EN ISO 10683:2014
ISO 10683:2014(E)
Introduction
The revision of ISO 10683:2000 was made in order to define the relevant requirements on zinc flake
coated fasteners (coating systems with and without hexavalent chromium) for all parties involved in
the fastener field, i.e. chemical suppliers, coaters, fastener manufacturers, distributors and end users. It
covers all types of fasteners, i.e. fasteners with ISO metric thread, fasteners with non-ISO metric thread
(including thread forming, ASME inch 60° screw thread, etc.) and non-threaded fasteners (including
washers, pins, clips, etc.). It also provides basic advice for the design and use of coated fasteners in
assembly.
vi © ISO 2014 – All rights reserved
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SIST EN ISO 10683:2014
INTERNATIONAL STANDARD ISO 10683:2014(E)
Fasteners — Non-electrolytically applied zinc flake
coatings
1 Scope
This International Standard specifies requirements for non-electrolytically applied zinc flake coatings
for steel fasteners. It applies to coatings:
— with or without hexavalent chromium;
— with or without top coat;
— with or without lubricant (integral lubricant and/or subsequently added lubricant).
National regulations for the restriction or prohibition of certain chemical elements should be taken into
account in the countries or regions concerned.
It applies to bolts, screws, studs and nuts with ISO metric thread, to fasteners with non-ISO metric
thread, and to non-threaded fasteners such as washers, pins, clips, etc.
NOTE Coatings in accordance with this International Standard are especially used for high strength fasteners
(≥1 000 MPa) to avoid risk of internal hydrogen embrittlement (see 4.4).
Information for design and assembly of coated fasteners is given in Annex A.
This International Standard does not specify requirements for such fastener properties as weldability
or paintability. It does not apply to mechanically applied zinc coatings.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.
ISO 1463, Metallic and oxide coatings — Measurement of coating thickness — Microscopical method
ISO 1502, ISO general-purpose metric screw threads — Gauges and gauging
1)
ISO 1891-2, Fasteners — Terminology — Part 2: Vocabulary and definitions for coatings
ISO 3269, Fasteners — Acceptance inspection
ISO 3613:2010, Metallic and other inorganic coatings — Chromate conversion coatings on zinc, cadmium,
aluminium-zinc alloys and zinc-aluminium alloys — Test methods
ISO 6988, Metallic and other non organic coatings — Sulfur dioxide test with general condensation of
moisture
ISO 8991, Designation system for fasteners
ISO 9227:2012, Corrosion tests in artificial atmospheres — Salt spray tests
ISO 16047, Fasteners — Torque/clamp force testing
1) To be published.
© ISO 2014 – All rights reserved 1
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SIST EN ISO 10683:2014
ISO 10683:2014(E)
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 1891-2 apply.
4 General characteristics of the coating
4.1 Zinc flake coating systems
Zinc flake coating systems are produced by applying a zinc flake dispersion to the surface of a steel
fastener, usually with the addition of aluminium flakes, in a suitable medium. Under the influence of heat
(curing), a bonding amongst flakes and also between flakes and substrate is generated, thus forming an
inorganic surface coating sufficiently electrically conducting to ensure cathodic protection. The coating
may or may not contain hexavalent chromium, Cr(VI).
Special techniques may be necessary to avoid excessive or insufficient coating thickness.
Special techniques may be necessary to prevent lightweight and/or flat fasteners from sticking together
(e.g. washers, clips, fasteners with captive washer, flanged nuts).
An additional top coat can be applied to increase corrosion resistance and/or to achieve specific properties
(e.g. torque/tension properties, chemical resistance, aspect, colour, electrical insulation/conductivity –
see A.2).
4.2 Composition of the systems
There are four basic zinc flake coating systems as shown in Figure 1.
Key
1 only base coat
2 base coat + lubricant
3 base coat + top coat
4 base coat + top coat + lubricant
Figure 1 — Basic zinc flake coating systems
Base coat and top coat can be with integral lubricant, see detailed possible combinations in A.1.2.
4.3 Mechanical and physical properties and curing
The coating process shall not adversely influence the mechanical and physical properties of the fasteners.
NOTE Distributors who coat non-coated fasteners are considered as alteration coating distributors in
[9]
accordance with ISO 16426.
Depending on the zinc flake coating system, the curing temperatures can be up to 320 °C. The curing
temperature shall not be above the tempering temperature of quenched and tempered fasteners.
2 © ISO 2014 – All rights reserved
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SIST EN ISO 10683:2014
ISO 10683:2014(E)
WARNING — The curing process (especially with higher temperature and/or longer duration)
may affect the fatigue limit of fasteners with thread rolled after heat treatment. See also A.1.3 for
other possible effects of curing.
4.4 Avoidance of internal hydrogen embrittlement
A characteristic of zinc flake coating systems is that hydrogen is not generated during the deposition
process.
Pre-treatment processes using alkaline/solvent cleaner followed by mechanical cleaning do not generate
hydrogen, thus eliminating all risk of internal hydrogen embrittlement (IHE).
When mechanical cleaning is not suitable for functional reasons (e.g. for fasteners with captive washers,
fasteners with internal threads, fasteners to be rack coated), chemical cleaning (pickling) may be applied,
provided that acid with suitable inhibitor and minimum cleaning cycle time are used to minimize the
risk of internal hydrogen embrittlement. Fasteners with hardness greater than 385 HV or property
class 12.9 and above shall not be subjected to acid cleaning. The duration between cleaning and coating
shall be as short as possible.
A phosphating process is permitted as an alternative to mechanical cleaning (hydrogen may be generated
during this pre-treatment process, however the curing process allows outward diffusion). The duration
between phosphating and coating shall be as short as possible.
Cathodic cleaning processes are not permitted.
NOTE Zinc flake coatings have a high permeability for hydrogen which, during the curing process, allows
outward diffusion of hydrogen which may have been absorbed during the pre-treatment process as specified in
this subclause.
4.5 Coating systems and coating processes
The type and geometry of the fasteners shall be considered when selecting a coating system and the
related coating process, see A.2.
5 Corrosion protection and testing
5.1 General
Corrosion resistance in accelerated corrosion tests cannot be directly related to corrosion protection
behaviour in particular service environments. However, accelerated tests are used to evaluate the
corrosion resistance of the coating.
5.2 Neutral salt spray test
The neutral salt spray test (NSS) in accordance with ISO 9227:2012, 5.2, is used to evaluate the corrosion
resistance of the coating systems. For coated fasteners, the salt spray cabinet shall be controlled in
accordance with Annex C.
The neutral salt spray test shall be carried out on fasteners alone, not sooner than 24 h after coating in
the “as-coated” condition, i.e. before sorting, packaging and/or assembling.
After the neutral salt spray test using test duration of Table 1 there shall be no visible basis metal
corrosion (red rust).
© ISO 2014 – All rights reserved 3
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SIST EN ISO 10683:2014
ISO 10683:2014(E)
Table 1 — Standard categories for neutral salt spray test
Neutral salt spray test duration
Reference thickness
a
of the coating system
(without red rust)
240 h 4 µm
480 h 5 µm
600 h 6 µm
720 h 8 µm
960 h 10 µm
a
The reference thickness includes base coat(s) and top coat(s) if any, with or without
Cr(VI). The corrosion resistance shall be decisive for acceptance, the reference thickness is
given for guidance only.
The composition of the system (base coat only, base coat + top coat, etc.) shall be specified at
the time of the order.
NOTE Guidance for the selection of coating thickness in relation to corrosion protection is given in Annex B.
5.3 Sulfur dioxide test (Kesternich test)
This test is only intended for outdoor building fasteners.
The sulfur dioxide test with general condensation of moisture in accordance with ISO 6988 is used to
evaluate the corrosion resistance of the coating systems; for outdoor building fasteners, the test shall be
carried out with two litres of SO .
2
The sulfur dioxide test shall be carried out on fasteners alone, no sooner than 24 h after coating in the
“as-coated” condition, i.e. before sorting, packaging and/or assembling.
The minimum number of cycles shall be agreed between the supplier and the purchaser at the time of
the order, i.e. 2 cycles, 3, 5, 8, 10, 12, 15 cycles, etc.
5.4 Bulk handling, automatic processes such as feeding and/or sorting, storage and
transport
Bulk handling, automatic processes such as feeding and/or sorting, storage and transport can cause a
significant reduction of corrosion protection depending on the coating system and type and geometry
of the fasteners. This may especially occur for Cr(VI)-free coating systems where less self-healing effect
takes place and/or where top coats are sensitive to impact damage and/or abrasion.
When necessary, an agreement should be reached between the supplier and the purchaser, e.g. by
reducing the minimum duration to neutral salt spray test and/or by increasing the thickness of the
coating system.
6 Dimensional requirements and testing
6.1 General
Before coating, fasteners shall be within the specified dimensions. For ISO metric threads special
requirements may apply, see 6.2.2, B.4 and B.5.
4 © ISO 2014 – All rights reserved
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SIST EN ISO 10683:2014
ISO 10683:2014(E)
6.2 Bolts, screws, studs and nuts with ISO metric threads
6.2.1 Coating thickness
When considering the coating thickness related to the desired corrosion resistance, the dispersion of
the thickness of the coating system shall be taken into account, see B.3.
Coating thickness has a significant influence on gaugeability, therefore thread tolerance and clearance
in the thread shall be taken into account. The coating shall not cause the zero line (basic size) to be
exceeded in the case of external threads; nor shall it fall below in the case of internal threads, see B.4.
NOTE For standard bolts, screws, studs and nuts not specifically manufactured to accommodate zinc flake
coatings, see B.4 and B.5.
6.2.2 Gaugeability and assemblability
Coated ISO metric screw threads shall be gauged in accordance with ISO 1502 with a GO-gauge of
tolerance position h for external threads and H for internal threads.
3
When gauging a coated external thread, a maximum torque of 0,001 d (Nm) is acceptable, where d is the
nominal thread diameter in millimetres, see Table 2.
Table 2 — Maximum torque for gauging of coated ISO metric screw threads
Nominal thread Maximum torque
a
diameter, d for gauging
mm Nm
4 0,06
5 0,13
6 0,22
8 0,51
10 1,0
12 1,7
14 2,7
16 4,1
18 5,8
20 8,0
22 11
24 14
27 20
30 27
33 36
36 47
39 59
a
For other diameters, the torque shall be calculated in
3
accordance with 0,001 d (Nm) and rounded to 2 digits.
Other acceptance procedures may be applied by agreement between supplier and purchaser:
— for external thread, use of a suitable nut or the original mating fastener;
— for internal thre
...
SLOVENSKI STANDARD
oSIST prEN ISO 10683:2011
01-junij-2011
Vezni elementi - Cinkova lamelna prevleka, ki ni izdelana z elektrolizo (ISO/DIS
10683:2011)
Fasteners - Non-electrolytically applied zinc flake coatings (ISO/DIS 10683:2011)
Verbindungselemente - Nichtelektrolytisch aufgebrachte Zinklamellenüberzüge (ISO/DIS
10683:2011)
Éléments de fixation - Revêtements non électrolytiques de de zinc lamellaire (ISO/DIS
10683:2011)
Ta slovenski standard je istoveten z: prEN ISO 10683
ICS:
21.060.01 Vezni elementi na splošno Fasteners in general
25.220.40 Kovinske prevleke Metallic coatings
oSIST prEN ISO 10683:2011 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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oSIST prEN ISO 10683:2011
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oSIST prEN ISO 10683:2011
EUROPEAN STANDARD
DRAFT
prEN ISO 10683
NORME EUROPÉENNE
EUROPÄISCHE NORM
March 2011
ICS 21.060.01; 25.220.40 Will supersede EN ISO 10683:2000
English Version
Fasteners - Non-electrolytically applied zinc flake coatings
(ISO/DIS 10683:2011)
Éléments de fixation - Revêtements non électrolytiques de Verbindungselemente - Nichtelektrolytisch aufgebrachte
de zinc lamellaire (ISO/DIS 10683:2011) Zinklamellenüberzüge (ISO/DIS 10683:2011)
This draft European Standard is submitted to CEN members for parallel enquiry. It has been drawn up by the Technical Committee
CEN/TC 185.
If this draft becomes a European Standard, CEN members are bound to comply with the CEN/CENELEC Internal Regulations which
stipulate the conditions for giving this European Standard the status of a national standard without any alteration.
This draft European Standard was established by CEN in three official versions (English, French, German). A version in any other language
made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland,
Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are aware and to
provide supporting documentation.
Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without notice and
shall not be referred to as a European Standard.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
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© 2011 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN ISO 10683:2011: E
worldwide for CEN national Members.
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oSIST prEN ISO 10683:2011
prEN ISO 10683:2011 (E)
Contents Page
Foreword .3
2
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oSIST prEN ISO 10683:2011
prEN ISO 10683:2011 (E)
Foreword
This document (prEN ISO 10683:2011) has been prepared by Technical Committee ISO/TC 2 "Fasteners" in
collaboration with Technical Committee CEN/TC 185 “Fasteners” the secretariat of which is held by DIN.
This document is currently submitted to the parallel Enquiry.
This document will supersede EN ISO 10683:2000.
Endorsement notice
The text of ISO/DIS 10683:2011 has been approved by CEN as a prEN ISO 10683:2011 without any
modification.
3
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oSIST prEN ISO 10683:2011
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oSIST prEN ISO 10683:2011
DRAFT INTERNATIONAL STANDARD ISO/DIS 10683
ISO/TC 2/SC 14 Secretariat: DIN
Voting begins on Voting terminates on
2011-03-24 2011-08-24
INTERNATIONAL ORGANIZATION FOR STANDARDIZATION • МЕЖДУНАРОДНАЯ ОРГАНИЗАЦИЯ ПО СТАНДАРТИЗАЦИИ • ORGANISATION INTERNATIONALE DE NORMALISATION
Fasteners — Non-electrolytically applied zinc flake coatings
Éléments de fixation — Revêtements non électrolytiques de zinc lamellaire
[Revision of first edition (ISO 10683:2000)]
ICS 21.060.01; 25.220.40
ISO/CEN PARALLEL PROCESSING
This draft has been developed within the International Organization for Standardization (ISO), and
processed under the ISO-lead mode of collaboration as defined in the Vienna Agreement.
This draft is hereby submitted to the ISO member bodies and to the CEN member bodies for a parallel
five-month enquiry.
Should this draft be accepted, a final draft, established on the basis of comments received, will be
submitted to a parallel two-month approval vote in ISO and formal vote in CEN.
To expedite distribution, this document is circulated as received from the committee
secretariat. ISO Central Secretariat work of editing and text composition will be undertaken at
publication stage.
Pour accélérer la distribution, le présent document est distribué tel qu'il est parvenu du
secrétariat du comité. Le travail de rédaction et de composition de texte sera effectué au
Secrétariat central de l'ISO au stade de publication.
THIS DOCUMENT IS A DRAFT CIRCULATED FOR COMMENT AND APPROVAL. IT IS THEREFORE SUBJECT TO CHANGE AND MAY NOT BE
REFERRED TO AS AN INTERNATIONAL STANDARD UNTIL PUBLISHED AS SUCH.
IN ADDITION TO THEIR EVALUATION AS BEING ACCEPTABLE FOR INDUSTRIAL, TECHNOLOGICAL, COMMERCIAL AND USER PURPOSES,
DRAFT INTERNATIONAL STANDARDS MAY ON OCCASION HAVE TO BE CONSIDERED IN THE LIGHT OF THEIR POTENTIAL TO BECOME
STANDARDS TO WHICH REFERENCE MAY BE MADE IN NATIONAL REGULATIONS.
RECIPIENTS OF THIS DRAFT ARE INVITED TO SUBMIT, WITH THEIR COMMENTS, NOTIFICATION OF ANY RELEVANT PATENT RIGHTS OF WHICH
THEY ARE AWARE AND TO PROVIDE SUPPORTING DOCUMENTATION.
© International Organization for Standardization, 2011
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oSIST prEN ISO 10683:2011
ISO/DIS 10683
Copyright notice
This ISO document is a Draft International Standard and is copyright-protected by ISO. Except as permitted
under the applicable laws of the user’s country, neither this ISO draft nor any extract from it may be
reproduced, stored in a retrieval system or transmitted in any form or by any means, electronic,
photocopying, recording or otherwise, without prior written permission being secured.
Requests for permission to reproduce should be addressed to either ISO at the address below or ISO’s
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Reproduction may be subject to royalty payments or a licensing agreement.
Violators may be prosecuted.
ii © ISO 2011 – All rights reserved
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oSIST prEN ISO 10683:2011
ISO/DIS 10683
Contents Page
1 Scope.1
2 Normative references.1
3 Terms and definitions .2
4 General characteristics of the coating.2
4.1 Zinc flake coating systems.2
4.2 Composition of the systems .2
4.3 Mechanical and physical properties and curing .2
4.4 Pre-treatment processes and avoidance of hydrogen embrittlement .3
4.5 Coating systems and coating processes.3
5 Corrosion protection and testing .3
5.1 General .3
5.2 Neutral salt spray test.3
5.3 Sulfur dioxide test .4
5.4 Bulk handling, automatic processes including feeding and/or sorting, and transport .4
6 Dimensional requirements and testing .4
6.1 General .4
6.2 Bolts, screws, studs and nuts with ISO metric threads .5
6.3 Other fasteners .6
7 Mechanical and physical properties and testing .6
7.1 Appearance .6
7.2 Corrosion resistance related to temperature .6
7.3 Test methods for thickness or coating weight determination.6
7.4 Ductility.7
7.5 Adhesion/cohesion .7
7.6 Sacrificial cathodic protection .7
7.7 Torque/tension relationship .7
7.8 Determination of chromate.8
8 Applicability of tests .8
8.1 General .8
8.2 Tests mandatory for each lot .8
8.3 Tests for in-process control.8
8.4 Tests to be conducted when specified by the customer .8
9 Designation .9
9.1 Designation of zinc flake systems for the order .9
9.2 Designation of zinc flake coating systems for the label .11
10 Ordering requirements.11
11 Storage conditions .11
Annex A (informative) Design and assembly of coated fasteners.12
A.1 Design of coated fasteners.12
A.2 Functional properties.13
A.3 Particular issues related to fasteners and coating processes .14
A.4 Storage of coated fasteners .15
Annex B (informative) Coating thickness and thread clearance for ISO metric screw threads .16
B.1 General .16
B.2 Geometrical relationship between coating thickness and pitch diameter .16
B.3 Consideration related to coating process .17
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B.4 Consequences for coating thickness.18
B.5 Compatibility between corrosion resistance and clearance.20
B.6 Examples of application.20
Annex C (informative) Control of the aggressivity of the salt spray chamber for coated fasteners .22
C.1 Purpose.22
C.2 Frequency.22
C.3 Operating conditions.22
C.4 Example of quotation of aggressivity.28
C.5 Example of report for the annual control and monthly monitoring of the test chamber
aggressivity.29
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oSIST prEN ISO 10683:2011
ISO/DIS 10683
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies
(ISO member bodies). The work of preparing International Standards is normally carried out through ISO
technical committees. Each member body interested in a subject for which a technical committee has been
established has the right to be represented on that committee. International organizations, governmental and
non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the
International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO 10683 was prepared by Technical Committee ISO/TC 2, Fasteners, Subcommittee SC 1, and by
Technical Committee CEN/TC 185, Fasteners in collaboration.
This second/third/. edition cancels and replaces the first/second/. edition (ISO 10683:2000), [clause(s) /
subclause(s) / table(s) / figure(s) / annex(es)] of which [has / have] been technically revised.
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Introduction
The revision of this International Standard was made in order to define the relevant requirements on zinc flake
coated fasteners (coating systems with and without chromate) for all parties involved in the fastener field, i.e.
chemical suppliers, coaters, fastener manufacturers, distributors and end users. It covers all types of
fasteners, i.e. fasteners with ISO metric thread, fasteners with non-ISO metric thread (including thread
forming, ASME inch 60° screw thread, etc.) and non-threaded fasteners (including washers, pins, clips, etc.).
It also provides basic advices for the design and use of coated fasteners in assembly.
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oSIST prEN ISO 10683:2011
DRAFT INTERNATIONAL STANDARD ISO/DIS 10683
Fasteners — Non-electrolytically applied zinc flake coatings
1 Scope
This International Standard specifies requirements for non-electrolytically applied zinc flake coatings for steel
fasteners. It applies to coatings:
⎯ with or without chromate,
⎯ with or without top coat,
⎯ with or without lubricant (integral lubricant and/or subsequently added lubricant).
NOTE 1 National regulations for the restriction or prohibition of certain chemical elements should be taken into account
in the countries or regions concerned.
It applies to bolts, screws, studs and nuts with ISO metric thread, to fasteners with non-ISO metric thread, and
to non-threaded fasteners such as washers, pins and clips.
NOTE 2 Coatings according to this International Standard are especially used for high strength fasteners (> 1000 MPa)
to avoid risk of hydrogen embrittlement (see 4.4).
Consideration for design and assembly of coated fasteners are given in Annex A.
This International Standard does not specify requirements for such fasteners properties as weldability or
paintability. It does not apply to mechanically applied zinc coatings.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.
ISO 1463, Metallic and oxide coatings — Measurement of coating thickness — Microscopical method
ISO 1502, ISO general purpose metric screw threads — Gauges and gauging
ISO 3269, Fasteners — Acceptance inspection
ISO 3613:2000, Chromate conversion coatings on zinc, cadmium, aluminium-zinc alloys and zinc-aluminium
alloys — Test methods
ISO 6988, Metallic and other non-organic coatings — Sulfur dioxide test with general condensation of
moisture
ISO 8991, Designation system for fasteners
ISO 9227:2006, Corrosion tests in artificial atmospheres — Salt spray tests
ISO 16047, Fasteners — Torque/clamp force testing
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3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO/WD Fasteners – Vocabulary for
coatings (under elaboration) apply.
4 General characteristics of the coating
4.1 Zinc flake coating systems
Zinc flake coating systems are produced by applying to the surface of a steel fastener a zinc flake dispersion,
usually with the addition of aluminium flakes, in a suitable medium. Under the influence of heat (curing), a
bonding amongst flakes and also between flakes and substrate is generated, thus forming an inorganic
surface coating sufficiently electrically conducting to ensure cathodic protection. The coating may or may not
contain chromate.
Special techniques can be necessary to avoid excessive or insufficient coating thickness.
Special techniques can be necessary to prevent light weight and/or flat fasteners from sticking together (e.g.
washers, clips, fasteners with captive washer, flanged nuts).
An additional top coat can be applied to increase corrosion resistance and/or to achieve specific properties
(e.g. torque/tension properties, chemical resistance, aspect, colour, electrical insulation/conductivity).
See A.1.3.
4.2 Composition of the systems
There are four basic zinc flake coating systems, see Figure 1:
⎯ only base coat: 1
⎯ base coat + lubricant: 2
⎯ base coat + top coat: 3
⎯ base coat + top coat + lubricant: 4
Figure 1 — Basic zinc flake coating systems
Base coat and top coat can be with integral lubricant, see detailed possible combinations in A.1.2.
4.3 Mechanical and physical properties and curing
The coating process shall not adversely influence the mechanical and physical properties of the fasteners.
NOTE Distributors who coat non-coated fasteners are considered as alteration distributors according to ISO 16426.
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Depending on the zinc flake coating system the curing temperatures can be up to 320 °C. The curing
temperature shall not be above the tempering temperature of quenched and tempered fasteners.
WARNING — The curing process (especially with higher temperature and/or longer duration) may
affect the fatigue limit of fasteners with thread rolled after heat treatment. See also A.1.3 for other
possible effect of curing.
4.4 Pre-treatment processes and avoidance of hydrogen embrittlement
A characteristic of zinc flake coatings is that hydrogen is not generated.
Fasteners to be coated with zinc flake coating systems shall be cleaned using alkaline cleaner followed by
mechanical cleaning. These pre-treatment steps do not generate nascent hydrogen, thus eliminating all risk of
hydrogen embrittlement from the pre-treatment process.
When the above pre-treatment is not possible for functional reasons (e.g. for fasteners with captive washers,
fasteners with internal threads, fasteners to be rack coated), chemical cleaning (pickling) may be applied,
provided that acid with suitable inhibitor and minimum cleaning cycle time are used to minimize the risk of
hydrogen embrittlement. The duration between cleaning and coating shall be as short as possible. Cathodic
cleaning processes are not permitted.
A suitable phosphating process is permitted as an alternative to chemical cleaning.
NOTE Zinc flake coatings have a high permeability for hydrogen which, during the curing process, allows effusion of
hydrogen which may have been absorbed during the pre-treatment process as specified hereabove.
4.5 Coating systems and coating processes
The type and geometry of the fasteners shall be considered when selecting a coating system and the related
coating process, see A.2.
5 Corrosion protection and testing
5.1 General
Performance in accelerated corrosion tests (neutral salt spray test, moisture tests, cycling tests, etc.) cannot
be directly related to corrosion protection behaviour in particular service environments. However, accelerated
tests are used to evaluate the corrosion protection performance of the coating.
5.2 Neutral salt spray test
The neutral salt spray test (NSS) in accordance with ISO 9227:2006, 5.2, is used to evaluate the corrosion
resistance of the coating systems. For coated fasteners, the salt spray chamber shall be controlled according
to Annex C.
The neutral salt spray test shall be carried out on the fastener at least 24h after coating in the "as-coated"
condition, i. e. before sorting and/or packaging.
After the neutral salt spray test using test duration of Table 1 there shall be no visible basis metal corrosion
(red rust).
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Table 1 — Salt spray test requirements
Salt spray test duration Reference thickness
a
of the coating system
(red rust)
240 h 4 µm
480 h 5 µm
600 h 6 µm
720 h 8 µm
960 h 10 µm
a
The reference thickness includes base coat(s) and top coat(s) if any, with or without
chromate. The corrosion resistance is decisive for acceptance, the reference thickness is
given for guidance only.
The composition of the system (base coat only, base coat + top coat, etc.) shall be
specified at the time of the order.
NOTE Guidance for the selection of coating thickness in relation to corrosion protection is given in Annex B.
5.3 Sulfur dioxide test
This test is only intended for outdoor building fasteners.
The sulfur dioxide test with general condensation of moisture in accordance with ISO 6988 is used to evaluate
the corrosion resistance of the coating systems; for outdoor building fasteners, the test shall be carried out
with two litres of SO .
2
The sulfur dioxide test shall be carried out on the fastener at least 24h after coating in the "as-coated"
condition, i. e. before sorting and/or packaging.
The minimum number of cycles shall be agreed between the purchaser and the customer at the time of the
order i.e. 2 cycles, 3, 5, 8, 10, 12, 15 cycles, etc.
5.4 Bulk handling, automatic processes including feeding and/or sorting, and transport
Bulk handling, automatic processes including feeding and/or sorting, and transport can cause a significant
reduction of corrosion protection depending on the coating system and type and geometry of the fasteners.
This may especially occurs for Cr(VI)-free coating systems where less self-healing effect takes place and/or
where top coats are sensitive to impact damage and abrasion.
When necessary, an agreement should be reached between the supplier and the customer, either reducing
the minimum duration to neutral salt spray test and/or increasing the thickness of the coating system.
6 Dimensional requirements and testing
6.1 General
Before coating, fasteners shall be within the specified dimensions. For ISO metric threads special
requirements may apply, see 6.2.2, B.4 and B.5.
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6.2 Bolts, screws, studs and nuts with ISO metric threads
6.2.1 Coating thickness
When checking the coating thickness related to the desired corrosion resistance, the dispersion of the coating
system shall be taken into account, see B.3.
Coating thickness has a significant influence on gaugeability, therefore thread tolerance and clearance in the
thread shall be taken into account. The coating shall not cause the zero line (basic size) to be exceeded in the
case of external threads; nor shall it fall below in the case of internal threads, see B.4.
NOTE For standard bolts and screws already manufactured, not exceeding the zero line position limits the
clearance and may decrease the maximum possible thickness of coating, thus limiting the corrosion
resistance, see B.5.
6.2.2 Gaugeability and assemblability
Coated ISO metric screw threads shall be gauged according to ISO 1502 with a GO-gauge of tolerance
position h for external threads and H for internal threads.
3
When gauging a coated external thread, a maximum torque of 0,001 d (Nm) is acceptable, where d is the
nominal thread diameter in mm, see Table 2.
Table 2 — Maximum torque for gauging of coated ISO metric screw threads
Nominal thread Maximum torque for
diameter d gauging
mm Nm
4 0,07
5 0,13
6 0,22
8 0,51
10 1,00
12 1,73
14 2,7
16 4,1
18 5,8
20 8,0
22 10,6
24 13,8
For other diameters, the torque shall be calculated
3
according to 0,001 d (Nm).
Other acceptance procedures may be applied by agreement between supplier and purchaser:
⎯ For external thread, use of a suitable nut or the original mating fastener,
⎯ For internal thread, use of a suitable mandrel or the original mating fastener.
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6.3 Other fasteners
There is no specific dimensional requirement for non-ISO metric threaded coated fasteners and non-threaded
coated fasteners.
7 Mechanical and physical properties and testing
7.1 Appearance
The colour of zinc flake coating is originally silver-grey. Other colours can be obtained by using a top coat.
The coated fastener shall be free from blisters and uncoated areas which may adversely effect the corrosion
protection. Local excess of coating shall not impair functional properties (see Clause 6 and A.2).
7.2 Corrosion resistance related to temperature
Elevated temperature can affect the corro
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