EN ISO 4521:2008

SLOVENSKI STANDARD
01-november-2008
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Metallic and other inorganic coatings - Electrodeposited silver and silver alloy coatings
for engineering purposes - Specification and test methods (ISO 4521:2008)
Metallische Überzüge - Galvanische Silber- und Silberlegierungs-Überzüge für
technische Zwecke - Anforderungen und Prüfverfahren (ISO 4521:2008)
Revêtements métalliques et autres revêtements inorganiques - Dépôts électrolytiques
d'argent et d'alliages d'argent pour applications industrielles - Spécifications et méthodes
d'essai (ISO 4521:2008)
Ta slovenski standard je istoveten z: EN ISO 4521:2008
ICS:
25.220.40 Kovinske prevleke Metallic coatings
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN ISO 4521
NORME EUROPÉENNE
EUROPÄISCHE NORM
September 2008
ICS 25.220.40
English Version
Metallic and other inorganic coatings - Electrodeposited silver
and silver alloy coatings for engineering purposes - Specification
and test methods (ISO 4521:2008)
Revêtements métalliques et autres revêtements Metallische Überzüge - Galvanische Silber- und
inorganiques - Dépôts électrolytiques d'argent et d'alliages Silberlegierungs-Überzüge für technische Zwecke -
d'argent pour applications industrielles - Spécifications et Anforderungen und Prüfverfahren (ISO 4521:2008)
méthodes d'essai (ISO 4521:2008)
This European Standard was approved by CEN on 24 August 2008.
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 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 Management Centre has the same status as the
official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, 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.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36  B-1050 Brussels
© 2008 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 4521:2008: E
worldwide for CEN national Members.

Contents Page
Foreword.3

Foreword
This document (EN ISO 4521:2008) 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 March 2009, and conflicting national standards shall be withdrawn at
the latest by March 2009.
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.
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, 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 the United Kingdom.
Endorsement notice
The text of ISO 4521:2008 has been approved by CEN as a EN ISO 4521:2008 without any modification.

INTERNATIONAL ISO
STANDARD 4521
Second edition
2008-09-01
Metallic and other inorganic coatings —
Electrodeposited silver and silver alloy
coatings for engineering purposes —
Specification and test methods
Revêtements métalliques et autres revêtements inorganiques — Dépôts
électrolytiques d'argent et d'alliages d'argent pour applications
industrielles — Spécifications et méthodes d'essai

Reference number
ISO 4521:2008(E)
©
ISO 2008
ISO 4521:2008(E)
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ii © ISO 2008 – All rights reserved

ISO 4521:2008(E)
Contents Page
Foreword. iv
Introduction . v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions. 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 specifications . 4
5.3 Designation of the basis material . 4
5.4 Designation of heat treatment requirements . 4
5.5 Examples of designations . 5
6 Requirements . 5
6.1 General. 5
6.2 Appearance . 5
6.3 Thickness . 6
6.4 Porosity. 6
6.5 Accelerated corrosion testing . 6
6.6 Composition . 6
6.7 Stress-relief heat treatment prior to electroplating. 6
6.8 Hydrogen-embrittlement-relief heat treatment after electroplating. 6
6.9 Adhesion. 7
6.10 Electrical properties . 7
6.11 Microhardness . 7
6.12 Solderability . 7
6.13 Wear resistance . 7
6.14 Ductility. 7
6.15 Undercoats . 7
6.16 Freedom from contamination . 8
6.17 Anti-tarnish treatments . 8
7 Sampling. 8
Annex A (normative) Requirements for undercoats. 9
Annex B (normative) Methods of measuring the thickness of electroplated silver and silver alloy
coatings . 11
Annex C (normative) Adhesion tests . 15
Annex D (normative) Determination of the presence of residual salts . 17
Bibliography . 19

ISO 4521:2008(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.
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 4521 was prepared by Technical Committee ISO/TC 107, Metallic and other inorganic coatings,
Subcommittee SC 3, Electrodeposited coatings and related finishes.
This second edition cancels and replaces the first edition (ISO 4521:1985), and also ISO 4522-1:1985,
ISO 4522-2:1985 and ISO 4522-3:1988, which have been technically revised.
iv © ISO 2008 – All rights reserved

ISO 4521:2008(E)
Introduction
Electrodeposited silver and silver alloy coatin
...