EN ISO 26945:2008

SLOVENSKI STANDARD
01-marec-2009
Kovinske in druge anorganske prevleke - Galvanske prevleke kositer-kobaltovih
zlitin (ISO 26945:2008)
Metallic and other inorganic coatings - Electrodeposited coatings of tin-cobalt alloy (ISO
26945:2008)
Metallische und andere anorganische Überzüge - Galvanische Überzüge aus Zinn-
Cobalt-Legierungen (ISO 26945:2008)
Revêtements métalliques et autres revêtements inorganiques - Dépôts électrolytiques
d'alliage étain-cobalt (ISO 26945:2008)
Ta slovenski standard je istoveten z: EN ISO 26945:2008
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 26945
NORME EUROPÉENNE
EUROPÄISCHE NORM
December 2008
ICS 25.220.40
English Version
Metallic and other inorganic coatings - Electrodeposited coatings
of tin-cobalt alloy (ISO 26945:2008)
Revêtements métalliques et autres revêtements Metallische und andere anorganische Überzüge -
inorganiques - Dépôts électrolytiques d'alliage étain-cobalt Galvanische Überzüge aus Zinn-Cobalt-Legierungen (ISO
(ISO 26945:2008) 26945:2008)
This European Standard was approved by CEN on 19 November 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: Avenue Marnix 17, B-1000 Brussels
© 2008 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 26945:2008: E
worldwide for CEN national Members.

Contents Page
Foreword .3

Foreword
This document (EN ISO 26945:2008) 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 June 2009, and conflicting national standards shall be withdrawn at
the latest by June 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 26945:2008 has been approved by CEN as a EN ISO 26945:2008 without any modification.

INTERNATIONAL ISO
STANDARD 26945
First edition
2008-12-15
Metallic and other inorganic coatings —
Electrodeposited coatings of tin-cobalt
alloy
Revêtements métalliques et autres revêtements inorganiques — Dépôts
électrolytiques d’alliage étain-cobalt

Reference number
ISO 26945:2008(E)
©
ISO 2008
ISO 26945:2008(E)
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ii © ISO 2008 – All rights reserved

ISO 26945:2008(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 processor .2
4.1 Required information .2
5 Designation .3
5.1 General.3
5.2 Designation specification .3
5.3 Basis metal .3
5.4 Designation of heat treatment requirements .3
5.5 Examples .4
6 Requirements.4
6.1 Basis material.4
6.2 Appearance .5
6.3 Undercoats .5
6.4 Thickness .5
6.5 Adhesion.6
6.6 Accelerated corrosion testing.6
6.7 Stress relief heat treatment prior to electroplating.7
6.8 Hydrogen-embrittlement-relief heat treatment after electroplating.7
7 Sampling.7
Annex A (normative) Methods of measuring the thickness of tin-cobalt alloy coatings .8
Bibliography .10

ISO 26945:2008(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 26945 was prepared by Technical Committee ISO/TC 107, Metallic and other inorganic coatings.
iv © ISO 2008 – All rights reserved

ISO 26945:2008(E)
Introduction
Electrodeposited coating of tin-cobalt alloy is characterized by its bright surface which is similar to decorative
chromium coating. Hardness and wear-resistance properties of tin-cobalt alloy coatings are not equivalent to
those of chromium coatings, but are similar to those of tin-nickel alloy coatings (see ISO 2179). Thus tin-cobalt
coatings may be regarded, as far as surface lustre is concerned, as one of the possible alternatives to
chromium coating. Due to its higher current efficiency (more than 70 %), tin-cobalt alloy coatings can be
applied by rack and barrel plating processes to a wide range of complicated shapes and sizes, e.g. nuts, bolts,
rivets, etc.
INTERNATIONAL STANDARD ISO 26945:2008(E)

Metallic and other inorganic coatings — Electrodeposited
coatings of tin-cobalt alloy
WARNING — This International Standard may not be compliant with some countries’ health and safety
legislation, 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 legislation associated with its use. It is the
responsibility of the user of this International Standard to establish appropriate health, safety and
environmentally acceptable practices and take suitable actions to comply with any national and
international regulations. Compliance with this International Standard does not of itself confer
immunity from legal obligations.
1 Scope
This International Standard specifies electrodeposited coatings of tin-cobalt alloy of approximate composition
75 % (mass fraction) to 80 % (mass fraction) tin, remainder cobalt, as a substitute for decorative chromium
coatings of 0,1 µm to 0,3 µm thickness. Hardness and wear resistance properties of the coatings obtained are
not equivalent to those of chromium coatings, but similar to those of tin-nickel alloy coatings.
Tin-cobalt alloy coatings can be applied by rack or barrel plating processes.
This International Standard does not specify requirements for the surface condition of the basis metal prior to
electroplating.
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
ISO 2080, Metallic and other i
...