prEN ISO 2081
(Main)Metallic and other inorganic coatings - Electroplated coatings on iron and steel using zinc treated with solutions containing chromium (VI) (ISO/DIS 2081:2024)
Metallic and other inorganic coatings - Electroplated coatings on iron and steel using zinc treated with solutions containing chromium (VI) (ISO/DIS 2081:2024)
ISO 2081:2018 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.
ISO 2081:2018 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.
ISO 2081:2018 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- Mit Chrom(VI)-haltigen Lösungen behandelte galvanische Überzüge auf Eisen und Stahl unter Verwendung von Zink (ISO/DIS 2081:2024)
Revêtements métalliques et autres revêtements inorganiques - Dépôts électrolytiques de zinc traité par des solutions contenant du chrome (VI) sur fer ou acier (ISO/DIS 2081:2024)
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 na železu in jeklu z uporabo cinka, obdelanega z raztopinami, ki vsebujejo krom (VI) (ISO/DIS 2081:2024)
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Standards Content (Sample)
SLOVENSKI STANDARD
01-december-2024
Kovinske in druge anorganske prevleke - Galvanske prevleke na železu in jeklu z
uporabo cinka, obdelanega z raztopinami, ki vsebujejo krom (VI) (ISO/DIS
2081:2024)
Metallic and other inorganic coatings - Electroplated coatings on iron and steel using zinc
treated with solutions containing chromium (VI) (ISO/DIS 2081:2024)
Metallische und andere anorganische Überzüge- Mit Chrom(VI)-haltigen Lösungen
behandelte galvanische Überzüge auf Eisen und Stahl unter Verwendung von Zink
(ISO/DIS 2081:2024)
Revêtements métalliques et autres revêtements inorganiques - Dépôts électrolytiques de
zinc traité par des solutions contenant du chrome (VI) sur fer ou acier (ISO/DIS
2081:2024)
Ta slovenski standard je istoveten z: prEN ISO 2081
ICS:
25.220.40 Kovinske prevleke Metallic coatings
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
DRAFT
International
Standard
ISO/DIS 2081
ISO/TC 107/SC 3
Metallic and other inorganic
Secretariat: KATS
coatings – Electroplated coatings
Voting begins on:
on iron and steel using zinc treated
2024-09-25
with solutions containing chromium
Voting terminates on:
(VI)
2024-12-18
ICS: 25.220.40
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENTS AND APPROVAL. IT
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Reference number
ISO/DIS 2081:2024(en)
DRAFT
ISO/DIS 2081:2024(en)
International
Standard
ISO/DIS 2081
ISO/TC 107/SC 3
Metallic and other inorganic
Secretariat: KATS
coatings – Electroplated coatings on
Voting begins on:
iron and steel using zinc treated with
solutions containing chromium (VI)
Voting terminates on:
ICS: 25.220.40
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENTS AND APPROVAL. IT
IS THEREFORE SUBJECT TO CHANGE
AND MAY NOT BE REFERRED TO AS AN
INTERNATIONAL STANDARD UNTIL
PUBLISHED AS SUCH.
This document is circulated as received from the committee secretariat.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL,
© ISO 2024
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
STANDARDS MAY ON OCCASION HAVE TO
ISO/CEN PARALLEL PROCESSING
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
BE CONSIDERED IN THE LIGHT OF THEIR
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
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NATIONAL REGULATIONS.
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TO SUBMIT, WITH THEIR COMMENTS,
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NOTIFICATION OF ANY RELEVANT PATENT
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PROVIDE SUPPORTING DOCUMENTATION.
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Published in Switzerland Reference number
ISO/DIS 2081:2024(en)
ii
ISO/DIS 2081:2024(en)
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 .5
6 Requirements . 5
6.1 Appearance .5
6.2 Thickness .5
6.3 Conversion coatings and other supplementary treatments .5
6.4 Adhesion of zinc and conversion coatings .6
6.5 Accelerated corrosion testing .6
6.5.1 Neutral salt spray test .6
6.5.2 Corrosion rating .7
6.6 Stress relief heat treatments before cleaning and metal deposition .7
6.7 Hydrogen-embrittlement-relief heat treatments after electroplating .7
7 Sampling . 7
Annex A (normative) Designation of supplementary treatments . 9
Annex B (normative) Measurement of average thickness of coating on small articles .11
Bibliography .12
iii
ISO/DIS 2081:2024(en)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies ISO (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 fifth edition cancels and replaces the fourth edition (ISO 2081:2018), which has been technically
revised. The following main changes have been made:
— References to trivalent chromium (Cr III) passivate have been removed since these systems are
encompassed in EN ISO 19598.
— References to sampling have been updated to reflect actual industry practice. Provided capability
studies are performed at the required frequencies these are adequate to ensure compliance of plated
components with the standard parameters.
iv
ISO/DIS 2081:2024(en)
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.
Chromium (VI) 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 chromium (VI) conversion and
other supplementary coatings.
With reference to chromium (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 ar
...
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