EN ISO 17668:2016
(Main)Zinc diffusion coatings on ferrous products - Sherardizing - Specification (ISO 17668:2016)
Zinc diffusion coatings on ferrous products - Sherardizing - Specification (ISO 17668:2016)
ISO 17668:2016 specifies minimum thickness requirements for six classes of zinc diffusion layers applied to ferrous products by the sherardizing process for the purpose of protection against corrosion and wear.
ISO 17668:2016 does not specify any requirements for the surface condition (finish or roughness) of the basis material before sherardizing.
Post-treatments (conversion coatings), after-treatments or organic over-coatings (Duplex) of sherardized articles are not in the scope of this International Standard.
NOTE 1 For general information about post-treatments, see Annex C and Annex D.
ISO 17668:2016 does not apply to sherardized products (e.g. fasteners, tubes) for which specific standards exist and which might include additional requirements or requirements which are different from those of this International Standard.
NOTE 2 Individual product standards can incorporate this International Standard for the coating by quoting its number, or can incorporate it with modification specific to the product.
Zink-Diffusionsschichten auf Eisen - Sherardisieren - Anforderungen (ISO 17668:2016)
Diese Internationale Norm legt die Anforderungen an die Mindestschichtdicke für sechs Klassen von Zinküberzügen, die zum Schutz vor Korrosion und Verschleiß mithilfe des Sherardisierungsverfahrens auf Eisenwerkstoffe aufgebracht wurden, fest.
Diese Internationale Norm legt keine Anforderungen an den Zustand der Oberfläche (Oberflächen-beschaffenheit oder Rauheit) des Grundwerkstoffs vor dem Sherardisieren fest.
Nachbehandlungen (Konversionsschichten), nachträgliche Behandlungen oder organische Beschichtungen (Duplex-Systeme) von sherardisierten Bauteilen werden von der Internationalen Norm nicht erfasst.
ANMERKUNG 1 Für allgemeine Informationen zu den Nachbehandlungen siehe Anhang C und Anhang D.
Diese Internationale Norm gilt nicht für sherardisierte Produkte (z. B. Befestigungselemente, Rohre), für die es besondere Normen gibt und für die zusätzliche Anforderungen oder von dieser Internationalen Norm abweichende Anforderungen gelten könnten.
ANMERKUNG 2 Einzelne Produktnormen können durch Angabe der Nummer auf die vorliegende Norm für Schichten verweisen oder sie mit produktspezifischen Modifikationen integrieren.
Revêtements par diffusion de zinc sur les produits ferreux - Shérardisation - Spécification (ISO 17668:2016)
ISO 17668:2016 spécifie les exigences relatives à l'épaisseur minimale de six classes de couches par diffusion de zinc appliquées aux produits ferreux selon le procédé de shérardisation en vue de fournir une protection contre la corrosion et l'usure.
ISO 17668:2016 ne spécifie aucune exigence relative à l'état de surface (fini ou rugosité) du matériau de base avant shérardisation.
Les post-traitements (couches de conversion), les traitements subséquents ou les revêtements organiques (systèmes Duplex) appliqués aux pièces shérardisées ne relèvent pas du domaine d'application de la présente Norme internationale.
NOTE 1 Pour des informations générales sur les post-traitements, voir l'Annexe C et l'Annexe D.
ISO 17668:2016 ne s'applique pas aux produits shérardisés (tels que les éléments de fixation, les tubes, etc.) pour lesquels des normes spécifiques existent et sont susceptibles de comporter des exigences supplémentaires ou des exigences différentes de celles définies dans la présente Norme internationale.
NOTE 2 En ce qui concerne les revêtements, une norme de produit peut référencer la présente Norme internationale en citant son numéro complet ou peut l'intégrer à son corps de texte en apportant les modifications spécifiques au produit.
Cinkove difuzijske prevleke na železovih izdelkih - Šeradiranje - Specifikacija (ISO 17668:2016)
Ta standard ISO določa minimalne zahteve za debelino za šest razredov cinkove prevleke, uporabljene za železove izdelke po postopku šeradiranja za zaščito pred korozijo in obrabo. Določa tudi minimalne zahteve za cinkov prah, ki se uporablja v postopku šeradiranja. Ta standard ne določa zahtev za stanje površine (zaključno ali hrapavo) osnovnega materiala pred šeradiranjem. Ta standard ne zajema naknadne obdelave ali organskih premazov šeradiranih izdelkov. Ta standard se ne uporablja za šeradirane izdelke (npr. vezne elemente, cevi), za katere obstajajo posebni standardi, ki lahko vključujejo dodatne zahteve ali zahteve, ki se razlikujejo od tistih iz tega standarda. OPOMBA: Standardi za posamezne izdelke lahko vključujejo določbe tega standarda za prevleko z navedbo njegove številke ali s spremembami, ki so posebej prilagojene izdelku.
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-maj-2016
1DGRPHãþD
SIST EN 13811:2003
Cinkove difuzijske prevleke na železovih izdelkih - Šeradiranje - Specifikacija (ISO
17668:2016)
Zinc diffusion coatings on ferrous products - Sherardizing - Specification (ISO
17668:2016)
Zink-Diffusionsbeschichtungen auf Eisen - Sherardisieren - Anforderungen (ISO
17668:2016)
Revêtements par diffusion de zinc sur les produits ferreux - Shérardisation - Spécification
(ISO 17668:2016)
Ta slovenski standard je istoveten z: EN ISO 17668:2016
ICS:
25.220.40 Kovinske prevleke Metallic coatings
77.120.60 Svinec, cink, kositer in Lead, zinc, tin and their
njihove zlitine alloys
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EN ISO 17668
EUROPEAN STANDARD
NORME EUROPÉENNE
March 2016
EUROPÄISCHE NORM
ICS 25.220.40 Supersedes EN 13811:2003
English Version
Zinc diffusion coatings on ferrous products - Sherardizing -
Specification (ISO 17668:2016)
Revêtements par diffusion de zinc sur les produits Zink-Diffusionsüberzüge auf Eisen - Sherardisieren -
ferreux - Shérardisation - Spécification (ISO Anforderungen (ISO 17668:2016)
17668:2016)
This European Standard was approved by CEN on 2 January 2016.
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
© 2016 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 17668:2016 E
worldwide for CEN national Members.
Contents Page
European foreword . 3
European foreword
This document (EN ISO 17668:2016) 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” 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 2016, and conflicting national standards
shall be withdrawn at the latest by September 2016.
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 13811:2003.
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 17668:2016 has been approved by CEN as EN ISO 17668:2016 without any modification.
INTERNATIONAL ISO
STANDARD 17668
First edition
2016-02-01
Zinc diffusion coatings on ferrous
products — Sherardizing —
Specification
Revêtements par diffusion de zinc sur les produits ferreux —
Shérardisation — Spécification
Reference number
ISO 17668:2016(E)
©
ISO 2016
ISO 17668:2016(E)
© 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
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ii © ISO 2016 – All rights reserved
ISO 17668:2016(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 General requirements . 3
4.1 Surface condition base material . 3
4.2 Information to be supplied by the purchaser . 3
5 Acceptance inspection and sampling . 3
6 Coating properties . 4
6.1 Appearance . 4
6.2 Thickness . 4
6.2.1 General. 4
6.2.2 Test methods . 4
6.2.3 Reference areas . 5
6.2.4 Magnetic method or electro-magnetic method . 5
6.2.5 Gravimetric method . 5
6.2.6 Thickness requirements . 5
6.3 Acceptance criteria . 6
6.4 Additional clearances for threaded components . 6
7 Ceritificate of compliance . 6
Annex A (normative) Information to be supplied by the purchaser to the sherardizer .7
Annex B (informative) Determination of thickness . 8
Annex C (informative) General information .10
Annex D (informative) Corrosion resistance of sherardized layers .12
Bibliography .13
ISO 17668:2016(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
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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
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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 107, Metallic and other inorganic coatings,
Subcommittee SC 4, Hot dip coatings (galvanized, etc.).
iv © ISO 2016 – All rights reserved
ISO 17668:2016(E)
Introduction
Sherardizing is a thermal diffusion coating process in which ferrous articles are heated in the presence
of a sherardizing mixture consisting of zinc dust with or without an inert material.
The process is commonly performed in closed, slowly rotating or fixed containers at temperatures
ranging from around 300 °C to 500 °C. The normal processing temperature is below the melting point
of zinc (419 °C).
During the process, zinc reacts with the surface to form inter-metallic layers on ferrous articles.
A coating thickness of 10 µm to 75 µm (and higher if required) can be achieved. The coating thickness is
accurately controlled by the amount of zinc dust, processing time and temperature. The coating closely
follows the contours of the base material and uniform coating thicknesses are produced on articles,
including those of irregular shape.
After sherardizing, the container load is cooled down. A screening process separates the sherardized
articles from the unused sherardizing mixture. The articles, with the zinc-iron inter-metallic layers, are
eventually post-treated (by phosphating, chromating or another suitable passivation process) resulting
in a clean and passivated surface.
It is common to use articles coated with zinc-iron inter-metallic layers as a primer or base-coat for
duplex-systems.
For additional information about the sherardizing process and the application possibilities of
sherardized articles, see Reference [12] and Reference [13].
Sherardizing (thermal diffusion coating) is also known as the following:
— diffusion zinc plating (Germany);
— thermal diffusion coating (Russia);
— thermal diffusion galvanizing (Ukraine);
—
...
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