SIST EN ISO 2081:2018
(Main)Metallic and other inorganic coatings - Electroplated coatings of zinc with supplementary treatments on iron or steel (ISO 2081:2018)
Metallic and other inorganic coatings - Electroplated coatings of zinc with supplementary treatments on iron or steel (ISO 2081:2018)
This document specifies requirements for electroplated coatings of zinc with supplementary treatments
on iron or steel. It includes information to be supplied by the purchaser to the electroplater, and the
requirements for heat treatment before and after electroplating.
It is not applicable to zinc coatings applied
— to sheet, strip or wire in the non-fabricated form,
— to close-coiled springs, or
— for purposes other than protective or decorative.
This document does not specify requirements for the surface condition of the basis metal prior to
electroplating with zinc. However, defects in the surface of the basis metal can adversely affect the
appearance and performance of the coating.
The coating thickness that can be applied to threaded components can be limited by dimensional
requirements, including class or fit.
Metallische und andere anorganische Überzüge - Galvanische Zinküberzüge auf Eisenwerkstoffen mit zusätzlicher Behandlung (ISO 2081:2018)
Dieses Dokument legt Anforderungen an galvanisch abgeschiedene Zinküberzüge auf Eisenwerkstoffen mit zusätzlicher Behandlung fest. Es enthält Informationen, die der Auftraggeber dem galvanischen Betrieb geben muss, sowie Anforderungen an die Wärmebehandlung vor und nach der galvanischen Metallabschei-dung.
Es gilt nicht für Zinküberzüge
- auf Blechen, Bändern oder Draht in unbearbeiteter Form,
- auf engspiraligen Federn oder
- für andere Zwecke als zum Korrosionsschutz oder zur Dekoration.
Dieses Dokument legt keine Anforderungen an die Oberflächenbeschaffenheit des Grundmetalls vor der galvanischen Zinkabscheidung fest. Fehler in der Oberfläche des Grundmetalls können jedoch das Aussehen und die Gebrauchstauglichkeit von Zinküberzügen ungünstig beeinflussen.
Die auf Verbindungselemente mit Gewinde aufzubringende Schichtdicke kann durch Abmessungsanfor-derungen, wie Klasse oder Passung, begrenzt sein.
Revêtements métalliques et autres revêtements inorganiques - Dépôts électrolytiques de zinc avec traitements supplémentaires sur fer ou acier (ISO 2081:2018)
ISO 2081:2018 spécifie les exigences applicables aux dépôts électrolytiques de zinc avec traitements supplémentaires sur le fer ou l'acier. Il inclut les informations à fournir par l'acheteur à l'électroplaste, ainsi que les exigences relatives au traitement thermique avant et après dépôt électrolytique.
ISO 2081:2018 n'est pas applicable aux revêtements de zinc appliqués:
- sur tôles, feuillards ou fils à l'état non façonné;
- sur des ressorts à spirales serrées;
- dans un autre but que la protection ou la décoration.
ISO 2081:2018 ne spécifie pas d'exigence relative à l'état de surface du métal de base avant dépôt électrolytique de zinc. Toutefois, la présence de défauts à la surface du métal de base peut avoir une incidence négative sur l'aspect et la performance du revêtement.
L'épaisseur du revêtement susceptible d'être appliqué sur les pièces filetées peut être limitée par des exigences dimensionnelles, y compris la classe ou l'ajustement.
Kovinske in druge anorganske prevleke - Galvanske prevleke cinka z dodatno obdelavo na železu in jeklu (ISO 2081:2018)
Ta dokument določa zahteve za galvanske cinkove prevleke z dodatno obdelavo na železu in jeklu. Zajema informacije, ki jih mora kupec dostaviti izdelovalcu galvanske prevleke, in zahteve za prevleke za toplotno obdelavo pred in po galvanizaciji.
Ne uporablja se za cinkove prevleke:
– za pločevine, trakove ali žice v nepredelani obliki,
– za vijačne vzmeti ali
– za uporabe, katerih namen ni zaščita ali okrasitev.
Ta dokument ne določa zahtev za stanje površine osnovne kovine pred galvanizacijo s cinkom. Vendar pa defekti na površini osnovne kovine lahko negativno vplivajo na videz in učinkovitost prevleke.
Debelina prevleke, ki se lahko nanese na navojne komponente, je lahko omejena z dimenzijskimi zahtevami, vključno z razredom ali prileganjem.
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN ISO 2081:2018
01-maj-2018
1DGRPHãþD
SIST EN ISO 2081:2009
Kovinske in druge anorganske prevleke - Galvanske prevleke cinka z dodatno
obdelavo na železu in jeklu (ISO 2081:2018)
Metallic and other inorganic coatings - Electroplated coatings of zinc with supplementary
treatments on iron or steel (ISO 2081:2018)
Metallische und andere anorganische Überzüge - Galvanische Zinküberzüge auf
Eisenwerkstoffen mit zusätzlicher Behandlung (ISO 2081:2018)
Revêtements métalliques et autres revêtements inorganiques - Dépôts électrolytiques de
zinc avec traitements supplémentaires sur fer ou acier (ISO 2081:2018)
Ta slovenski standard je istoveten z: EN ISO 2081:2018
ICS:
25.220.40 Kovinske prevleke Metallic coatings
SIST EN ISO 2081:2018 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN ISO 2081:2018
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SIST EN ISO 2081:2018
EN ISO 2081
EUROPEAN STANDARD
NORME EUROPÉENNE
March 2018
EUROPÄISCHE NORM
ICS 25.220.40 Supersedes EN ISO 2081:2008
English Version
Metallic and other inorganic coatings - Electroplated
coatings of zinc with supplementary treatments on iron or
steel (ISO 2081:2018)
Revêtements métalliques et autres revêtements Metallische und andere anorganische Überzüge -
inorganiques - Dépôts électrolytiques de zinc avec Galvanische Zinküberzüge auf Eisenwerkstoffen mit
traitements supplémentaires sur fer ou acier (ISO zusätzlicher Behandlung (ISO 2081:2018)
2081:2018)
This European Standard was approved by CEN on 15 February 2018.
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, Serbia, 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: Rue de la Science 23, B-1040 Brussels
© 2018 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 2081:2018 E
worldwide for CEN national Members.
---------------------- Page: 3 ----------------------
SIST EN ISO 2081:2018
EN ISO 2081:2018 (E)
Contents Page
European foreword . 3
2
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SIST EN ISO 2081:2018
EN ISO 2081:2018 (E)
European foreword
This document (EN ISO 2081:2018) has been prepared by Technical Committee ISO/TC 107 "Metallic
and other inorganic coatings" in collaboration with Technical Committee CEN/TC 262 “Metallic and
other inorganic coatings, including for corrosion protection and corrosion testing of metals and alloys”
the secretariat of which is held by BSI.
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 September 2018, and conflicting national standards
shall be withdrawn at the latest by September 2018.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN ISO 2081:2008.
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, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.
Endorsement notice
The text of ISO 2081:2018 has been approved by CEN as EN ISO 2081:2018 without any modification.
3
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SIST EN ISO 2081:2018
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SIST EN ISO 2081:2018
INTERNATIONAL ISO
STANDARD 2081
Fourth edition
2018-02
Metallic and other inorganic
coatings — Electroplated coatings of
zinc with supplementary treatments
on iron or steel
Revêtements métalliques et autres revêtements inorganiques —
Dépôts électrolytiques de zinc avec traitements supplémentaires sur
fer ou acier
Reference number
ISO 2081:2018(E)
©
ISO 2018
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SIST EN ISO 2081:2018
ISO 2081:2018(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2018
All rights reserved. Unless otherwise specified, or required in the context of its implementation, 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
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva, Switzerland
Tel. +41 22 749 01 11
Fax +41 22 749 09 47
copyright@iso.org
www.iso.org
Published in Switzerland
ii © ISO 2018 – All rights reserved
---------------------- Page: 8 ----------------------
SIST EN ISO 2081:2018
ISO 2081:2018(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms, definitions, abbreviated terms and symbols . 2
3.1 Terms and definitions . 2
3.2 Abbreviated terms . 2
3.3 Symbols . 2
4 Information to be supplied by the purchaser to the electroplater .2
4.1 Essential information . 2
4.2 Additional information . 3
5 Designation . 3
5.1 General . 3
5.2 Designation specification . 3
5.3 Designation of the basis material. 4
5.4 Designation of heat treatment requirements . 4
6 Requirements . 5
6.1 Appearance . 5
6.2 Thickness . 5
6.3 Trivalent chromium conversion coatings and other supplementary treatments . 5
6.4 Adhesion of zinc and trivalent chromium conversion coatings . 5
6.5 Accelerated corrosion testing . 6
6.5.1 Neutral salt spray test. 6
6.5.2 Corrosion rating . 6
6.6 Stress relief heat treatments before cleaning and metal deposition . 6
6.7 Hydrogen-embrittlement-relief heat treatments after electroplating . 7
7 Sampling . 7
Annex A (normative) Designation of supplementary treatments . 8
Annex B (normative) Measurement of average thickness of coating on small articles .10
Bibliography .11
© ISO 2018 – All rights reserved iii
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SIST EN ISO 2081:2018
ISO 2081:2018(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 voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to the
World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see the following
URL: www .iso .org/ iso/ foreword .html.
This document was prepared by the European Committee for Standardization (CEN) Technical
Committee CEN/TC 262, Metallic and other inorganic coatings, in collaboration with ISO Technical
Committee TC 107, Metallic and other inorganic coatings, Subcommittee SC 3, Electrodeposited coatings
and related finishes, in accordance with the agreement on technical cooperation between ISO and CEN
(Vienna Agreement).
This fourth edition cancels and replaces the third edition (ISO 2081:2008), which has been technically
revised. The following main changes have been made:
— the number of normative references has been reduced;
— reference to ASTM B117 has been replaced with ISO 9227;
— some abbreviated terms have been removed;
— coating designations have been modified;
— reference to ISO 1463 for thickness measurement has been increased;
— reference to use of trivalent chromium has been increased
— reference to use of hexavalent chromium has been reduced;
— reference to ISO 19598 in relation to supplementary Cr(VI)-free treatment has been added;
— Tables 1 and 2 have been replaced with a revised Table 1 on neutral salt spray corrosion resistance;
— reference to ISO 15330 in relation to hydrogen embrittlement testing has been added;
— supplementary treatment designations have been modified;
— Annex C has been removed.
iv © ISO 2018 – All rights reserved
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SIST EN ISO 2081:2018
ISO 2081:2018(E)
Introduction
Zinc coatings are applied to iron or steel articles for protective and decorative purposes by
electrodeposition from acid zinc chloride, alkaline non-cyanide zinc, and alkaline zinc cyanide solutions.
Electroplated, bright zinc coatings are popular and the processes for preparing bright zinc coatings are
widely used.
The ability of a zinc coating to prevent corrosion is a function of its thickness and the type of service
conditions to which it is exposed. For example, the rate of corrosion of zinc will generally be greater
in industrial exposures than in rural ones. The type of service condition should, therefore, be taken
into consideration when specifying the minimum coating thickness. Trivalent chromate conversion
coatings and other supplementary treatments enhance the corrosion resistance of electrodeposited
zinc coatings and are commonly applied after electroplating.
Because the appearance and serviceability of zinc coatings depends on the surface condition of the
basis metal, agreement should be reached between the interested parties that the surface finish of the
basis metal is satisfactory for electroplating.
Trivalent chromate conversion coatings are omitted, or replaced by other conversion coatings, at the
specific request of the purchaser. This document provides the codes for all types of chromate conversion
and other supplementary coatings.
With reference to Cr(VI)-free conversion coatings, attention is drawn to ISO 19598. ISO 19598 is
applicable to zinc, zinc-iron and zinc-nickel plating, where only trivalent systems are required.
Due to the REACH Regulations the use of hexavalent chromium compounds will be banned in Europe
from September 2017 except where specifically authorized. Alternative conversion coatings or
substitutes, can be used and are required to satisfy the corrosion requirements given in this document.
Standard designations for metals and alloys can be found in References [12] to [16].
© ISO 2018 – All rights reserved v
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SIST EN ISO 2081:2018
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SIST EN ISO 2081:2018
INTERNATIONAL STANDARD ISO 2081:2018(E)
Metallic and other inorganic coatings — Electroplated
coatings of zinc with supplementary treatments on iron
or steel
WARNING — This document calls for the use of substances and/or procedures that can be injurious
to health if adequate safety measures are not taken. This document does not address any health
hazards, safety or environmental matters associated with its use. It is the responsibility of the
producers, purchasers and/or user of this document to establish appropriate health, safety and
environmentally acceptable practices.
1 Scope
This document specifies requirements for electroplated coatings of zinc with supplementary treatments
on iron or steel. It includes information to be supplied by the purchaser to the electroplater, and the
requirements for heat treatment before and after electroplating.
It is not applicable to zinc coatings applied
— to sheet, strip or wire in the non-fabricated form,
— to close-coiled springs, or
— for purposes other than protective or decorative.
This document does not specify requirements for the surface condition of the basis metal prior to
electroplating with zinc. However, defects in the surface of the basis metal can adversely affect the
appearance and performance of the coating.
The coating thickness that can be applied to threaded components can be limited by dimensional
requirements, including class or fit.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements 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 2064, Metallic and other inorganic coatings — Definitions and conventions concerning the measurement
of thickness
ISO 2080, Metallic and other inorganic coatings — Surface treatment, metallic and other inorganic
coatings — Vocabulary
ISO 2819, Metallic coatings on metallic substrates — Electrodeposited and chemically deposited coatings —
Review of methods available for testing adhesion
ISO 3613, Metallic and other inorganic coatings — Chromate conversion coatings on zinc, cadmium,
aluminium-zinc alloys and zinc-aluminium alloys — Test methods
ISO 4519, Electrodeposited metallic coatings and related finishes — Sampling procedures for inspection by
attributes
ISO 9227, Corrosion tests in artificial atmospheres — Salt spray tests
© ISO 2018 – All rights reserved 1
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SIST EN ISO 2081:2018
ISO 2081:2018(E)
ISO 9587, Metallic and other inorganic coatings — Pretreatment of iron or steel to reduce the risk of
hydrogen embrittlement
ISO 9588, Metallic and other inorganic coatings — Post-coating treatments of iron or steel to reduce the
risk of hydrogen embrittlement
ISO 10289, Methods for corrosion testing of metallic and other inorganic coatings on metallic substrates —
Rating of test specimens and manufactured articles subjected to corrosion tests
ISO 10587, Metallic and other inorganic coatings — Test for residual embrittlement in both metallic-coated
and uncoated externally-threaded articles and rods — Inclined wedge method
ISO 15330, Fasteners — Preloading test for the detection of hydrogen embrittlement — Parallel bearing
surface method
ISO 15724, Metallic and other inorganic coatings — Electrochemical measurement of diffusible hydrogen in
steels — Barnacle electrode method
3 Terms, definitions, abbreviated terms and symbols
3.1 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 2064 and ISO 2080 apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— IEC Electropedia: available at http:// www .electropedia .org/
— ISO Online browsing platform: available at http:// www .iso .org/ obp
3.2 Abbreviated terms
ER hydrog
...
SLOVENSKI STANDARD
oSIST prEN ISO 2081:2016
01-junij-2016
Kovinske in druge anorganske prevleke - Galvanske prevleke cinka z dodatno
obdelavo na železu in jeklu (ISO/DIS 2081:2016)
Metallic and other inorganic coatings - Electroplated coatings of zinc with supplementary
treatments on iron or steel (ISO/DIS 2081:2016)
Metallische und andere anorganische Überzüge - Galvanische Zinküberzüge auf
Eisenwerkstoffen mit zusätzlicher Behandlung (ISO/DIS 2081:2016)
Revêtements métalliques et autres revêtements inorganiques - Dépôts électrolytiques de
zinc avec traitements supplémentaires sur fer ou acier (ISO/DIS 2081:2016)
Ta slovenski standard je istoveten z: prEN ISO 2081
ICS:
25.220.40 Kovinske prevleke Metallic coatings
oSIST prEN ISO 2081:2016 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
---------------------- Page: 1 ----------------------
oSIST prEN ISO 2081:2016
---------------------- Page: 2 ----------------------
oSIST prEN ISO 2081:2016
DRAFT INTERNATIONAL STANDARD
ISO/DIS 2081
ISO/TC 107/SC 3 Secretariat: KATS
Voting begins on: Voting terminates on:
2016-04-07 2016-07-06
Metallic and other inorganic coatings — Electroplated
coatings of zinc with supplementary treatments on iron or
steel
Revêtements métalliques et autres revêtements inorganiques — Dépôts électrolytiques de zinc avec
traitements supplémentaires sur fer ou acier
ICS: 25.220.40
ISO/CEN PARALLEL PROCESSING
This draft has been developed within the European Committee for Standardization
(CEN), and processed under the CEN 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 three month enquiry.
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.
To expedite distribution, this document is circulated as received from the
IN ADDITION TO THEIR EVALUATION AS
committee secretariat. ISO Central Secretariat work of editing and text
BEING ACCEPTABLE FOR INDUSTRIAL,
composition will be undertaken at publication stage.
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
Reference number
NATIONAL REGULATIONS.
ISO/DIS 2081:2016(E)
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. ISO 2016
---------------------- Page: 3 ----------------------
oSIST prEN ISO 2081:2016
ISO/DIS 2081:2016(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2016, Published in Switzerland
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
Ch. de Blandonnet 8 • CP 401
CH-1214 Vernier, Geneva, Switzerland
Tel. +41 22 749 01 11
Fax +41 22 749 09 47
copyright@iso.org
www.iso.org
ii © ISO 2016 – All rights reserved
---------------------- Page: 4 ----------------------
oSIST prEN ISO 2081:2016
ISO/DIS 2081:2016(E)
Contents Page
Foreword . iv
Introduction . v
1 Scope. 1
2 Normative references . 1
3 Terms, definitions, abbreviated terms and symbols . 2
3.1 Terms and definitions . 2
3.2 Abbreviated terms . 2
3.3 Symbols . 3
4 Information to be supplied by the purchaser to the electroplater . 3
4.1 Essential information. 3
4.2 Additional information . 3
5 Designation. 4
5.1 General . 4
5.2 Designation specification. 4
5.3 Designation of the basis material . 5
5.4 Designation of heat treatment requirements . 5
5.5 Examples. 5
6 Requirements . 6
6.1 Appearance. 6
6.2 Thickness. 6
6.3 Conversion coatings and other supplementary treatments . 6
6.4 Adhesion of zinc and chromate coatings. 6
6.5 Accelerated corrosion testing . 7
6.6 Stress relief heat treatments before cleaning and metal deposition . 7
6.7 Hydrogen-embrittlement-relief heat treatments after electroplating . 8
7 Sampling . 8
Annex A (normative) Designation supplementary treatments . 9
A.1 Sealing. 9
A.2 Supplementary treatments other than conversion coatings . 9
Annex B (normative) Measurement of average thickness of coating on small articles. 10
B.1 Materials . 10
B.2 Procedure . 10
Bibliography. 11
© ISO 2016 – All rights reserved iii
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oSIST prEN ISO 2081:2016
ISO/DIS 2081:2016(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
ISO 2081 was prepared by Technical Committee ISO/TC 107, Metallic and other inorganic coatings,
Subcommittee SC 3, Electrodeposited coatings and related finishes, and CEN/TC 262 Metallic and other
inorganic coatings.
This fourth edition cancels and replaces the third edition (ISO 2081:2008), which has been technically
revised.
iv © ISO 2016 – All rights reserved
---------------------- Page: 6 ----------------------
oSIST prEN ISO 2081:2016
ISO/DIS 2081:2016(E)
Introduction
Zinc coatings are applied to iron or steel articles for protective and decorative purposes by
electrodeposition from acid zinc chloride, alkaline non-cyanide zinc, and alkaline zinc cyanide solutions.
Electroplated, bright zinc coatings are popular and the processes for preparing bright zinc coatings are
widely used.
The ability of a zinc coating to prevent corrosion is a function of its thickness and the type of service
conditions to which it is exposed. For example, the rate of corrosion of zinc will generally be greater in
industrial exposures than in rural ones. The type of service condition should, therefore, be taken into
consideration when specifying the minimum coating thickness. Chromate conversion coatings and
other supplementary treatments enhance the corrosion resistance of electrodeposited zinc coatings and
are commonly applied after electroplating.
Because the appearance and serviceability of zinc coatings depends on the surface condition of the basis
metal, agreement should be reached between the interested parties that the surface finish of the basis
metal is satisfactory for electroplating.
Chromate conversion coatings are omitted, or replaced by other conversion coatings, at the specific
request of the purchaser. This International Standard provides the codes for all types of chromate
conversion and other supplementary coatings.
Due to the REACH Regulations the use of hexavalent chromium compounds will be banned in
Europe from September 2017 except where specifically authorised. Alternative conversion
coatings or substitutes,can be used and are required to satisfy the corrosion requirements given
in this International Standard.
Standard designations for metals and alloys can be found in References [6] to [10] in the Bibliography.
© ISO 2016 – All rights reserved v
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oSIST prEN ISO 2081:2016
---------------------- Page: 8 ----------------------
oSIST prEN ISO 2081:2016
DRAFT INTERNATIONAL STANDARD ISO/DIS 2081:2016(E)
Metallic and other inorganic coatings — Electroplated
coatings of zinc with supplementary treatments on iron or
steel
WARNING — This International Standard may not be compliant with some countries’ health,
safety and environmental legislations and calls for the use of substances and/or procedures that
may be injurious to health if adequate safety measures are not taken. This International
Standard does not address any health hazards, safety or environmental matters and legislations
associated with its use. It is the responsibility of the producers, purchasers and/or user of this
International Standard to establish appropriate health, safety and environmentally acceptable
practices and take appropriate actions to comply with any national, regional and/or
international rules and regulations. Compliance with this International Standard does not, of
itself, confer immunity from legal obligations.
1 Scope
This International Standard specifies requirements for electroplated coatings of zinc with
supplementary treatments on iron or steel. It includes information to be supplied by the purchaser to
the electroplater, and the requirements for heat treatment before and after electroplating.
It is not applicable to zinc coatings applied
to sheet, strip or wire in the non-fabricated form,
to close-coiled springs, or
for purposes other than protective or decorative.
This International Standard does not specify requirements for the surface condition of the basis metal
prior to electroplating with zinc. However, defects in the surface of the basis metal can adversely affect
the appearance and performance of the coating.
The coating thickness that can be applied to threaded components can be limited by dimensional
requirements, including class or fit.
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 2064, Metallic and other inorganic coatings — Definitions and conventions concerning the
measurement of thickness
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oSIST prEN ISO 2081:2016
ISO/DIS 2081:2016(E)
ISO 2080, Metallic and other inorganic coatings — Surface treatment, metallic and other inorganic
coatings — Vocabulary
ISO 2177, Metallic coatings — Measurement of coating thickness — Coulometric method by anodic
dissolution
ISO 2178, Non-magnetic coatings on magnetic substrates — Measurement of coating thickness —
Magnetic method
ISO 2819, Metallic coatings on metallic substrates — Electrodeposited and chemically deposited
coatings — Review of methods available for testing adhesion
ISO 3497, Metallic coatings — Measurement of coating thickness — X-ray spectrometric methods
ISO 3543, Metallic and non-metallic coatings — Measurement of thickness — Beta backscatter method
ISO 3892, Conversion coatings on metallic materials — Determination of coating mass per unit area —
Gravimetric methods
ISO 4518, Metallic coatings — Measurement of coating thickness — Profilometric method
ISO 4519, Electrodeposited metallic coatings and related finishes — Sampling procedures for inspection by
attributes
ISO 9587, Metallic and other inorganic coatings — Pretreatment of iron or steel to reduce the risk of
hydrogen embrittlement
ISO 9588, Metallic and other inorganic coatings — Post-coating treatments of iron or steel to reduce the
risk of hydrogen embrittlement
ISO 10289, Methods for corrosion testing of metallic and other inorganic coatings on metallic
substrates — Rating of test specimens and manufactured articles subjected to corrosion tests
ISO 10587, Metallic and other inorganic coatings — Test for residual embrittlement in both metallic-
coated and uncoated externally-threaded articles and rods — Inclined wedge method
ISO 15724, Metallic and other inorganic coatings — Electrochemical measurement of diffusible hydrogen
in steels — Barnacle electrode method
ASTM B117, Standard Practice for Operating Salt Spray (Fog) Apparatus
3 Terms, definitions, abbreviated terms and symbols
3.1 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 2064 and ISO 2080 apply.
3.2 Abbreviated terms
ER hydrogen embrittlement relief heat treatment
NM non-metallic materials
PL plateable plastics materials
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oSIST prEN ISO 2081:2016
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SR stress relief heat treatment
T2 organic sealant
3.3 Symbols
Al chemical symbol for aluminium
Cu chemical symbol for copper
Fe chemical symbol for iron
Zn chemical symbol for zinc
4 Information to be supplied by the purchaser to the electroplater
4.1 Essential information
The following information shall be supplied to the electroplater in writing, for example, in the contract
or purchase order, or on engineering drawings:
a) the reference to this International Standard, ISO 2081, and the designation (see Clause 5);
b) the significant surface indicated, for example, by drawings or by the provision of suitably marked
samples;
c) the nature, condition and finish of the basis metal if they are likely to affect the
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