1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN ISO 26945:2011Metallic and other inorganic coatings Electrodeposited coatings of tin-cobalt alloy (ISO 26945:2011)BS EN ISO 26945:2011 BRITISH STANDARDNational forewordThis
2、 British Standard is the UK implementation of EN ISO 26945:2011. It supersedes BS EN ISO 26945:2008, which is withdrawn.The UK participation in its preparation was entrusted to Technical Committee STI/33, Electrodeposited and related coatings.A list of organizations represented on this committee can
3、 be obtained on request to its secretary.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. BSI 2011 ISBN 978 0 580 71741 3 ICS 25.220.40 Compliance with a British Standard cannot confer immunity from legal obli
4、gations.This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 March 2011.Amendments issued since publicationDate T e x t a f f e c t e dEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 26945 February 2011 ICS 25.220.40 Supersedes EN ISO
5、26945:2008English Version Metallic and other inorganic coatings - Electrodeposited coatings of tin-cobalt alloy (ISO 26945:2011) Revtements mtalliques et autres revtements inorganiques - Dpts lectrolytiques dalliage tain-cobalt (ISO 26945:2011) Metallische und andere anorganische berzge - Galvanisch
6、e berzge aus Zinn-Cobalt-Legierungen (ISO 26945:2011) This European Standard was approved by CEN on 8 February 2011. 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 an
7、y 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 langua
8、ge 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,
9、 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 COMIT EUROPEN DE NORMALISATION
10、 EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2011 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 26945:2011: EBS EN ISO 26945:2011 EN ISO 26945:2011 (E) 3 Foreword This document (EN ISO
11、26945:2011) 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
12、 standard, either by publication of an identical text or by endorsement, at the latest by August 2011, and conflicting national standards shall be withdrawn at the latest by August 2011. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rig
13、hts. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This document supersedes EN ISO 26945:2008. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Sta
14、ndard: Austria, Belgium, Bulgaria, Croatia, 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 Unite
15、d Kingdom. Endorsement notice The text of ISO 26945:2011 has been approved by CEN as a EN ISO 26945:2011 without any modification. BS EN ISO 26945:2011ISO 26945:2011(E) ISO 2011 All rights reserved iiiContents Page Foreword iv Introduction.v 1 Scope1 2 Normative references1 3 Terms and definitions .
16、2 4 Essential information to be supplied by the purchaser to the processor.2 5 Designation 3 5.1 General .3 5.2 Designation specification.3 5.3 Basis metal.3 5.4 Designation of heat treatment requirements4 5.5 Examples4 6 Requirements.4 6.1 Basis material 4 6.2 Appearance 5 6.3 Undercoats.5 6.4 Thic
17、kness .5 6.5 Adhesion 6 6.6 Quality-evaluation test of tin-cobalt alloy coatings .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 a
18、lloy coatings 8 Bibliography10 BS EN ISO 26945:2011ISO 26945:2011(E) iv ISO 2011 All rights reservedForeword 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
19、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 wo
20、rk. 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 Inte
21、rnational 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 t
22、he 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. This second edition cancels and replaces the first editi
23、on (ISO 26945:2008), of which it constitutes a minor revision. BS EN ISO 26945:2011ISO 26945:2011(E) ISO 2011 All rights reserved vIntroduction Electrodeposited coating of tin-cobalt alloy is characterized by its bright surface which is similar to decorative chromium coating. Hardness and wear-resis
24、tance 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 coat
25、ing. 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. BS EN ISO 26945:2011INTERNATIONAL STANDARD ISO 26945:2011(E) ISO 2011 All rights r
26、eserved 1Metallic and other inorganic coatings Electrodeposited coatings of tin-cobalt alloy WARNING This International Standard may not be compliant with some countries health and safety legislations and calls for the use of substances and/or procedures that may be injurious to health if adequate s
27、afety 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 user of this International Standard to establish appropriate health, safety and environmentally acc
28、eptable practices and take suitable actions to comply with any national and international regulations. Compliance with this International Standard does not in itself confer immunity from legal obligations. 1 Scope This International Standard specifies electrodeposited coatings of tin-cobalt alloy of
29、 approximate composition 75 % (mass fraction) to 80 % (mass fraction) tin, remainder cobalt, as a substitute for decorative chromium coatings of 0,1 m to 0,3 m thickness. Hardness and wear resistance properties of the coatings obtained are not equivalent to those of chromium coatings, but similar to
30、 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
31、 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 Microscopica
32、l 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 Electrod
33、eposited and chemically deposited coatings Review of methods available for testing adhesion ISO 3497, Metallic coatings Measurement of coating thickness X-ray spectrometric methods ISO 4519, Electrodeposited metallic coatings and related finishes Sampling procedures for inspection by attributes ISO
34、4541, Metallic and other non-organic coatings Corrodkote corrosion test (CORR test) ISO 9220, Metallic coatings Measurement of coating thickness Scanning electron microscope method BS EN ISO 26945:2011ISO 26945:2011(E) 2 ISO 2011 All rights reservedISO 9587, Metallic and other inorganic coatings Pre
35、treatment 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
36、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 i
37、norganic coatings Electrochemical measurement of diffusible hydrogen in steels Barnacle electrode method 3 Terms and definitions For the purposes of this document, the terms and definitions given in ISO 2064, ISO 2080, ISO 9587 and ISO 9588 apply. 4 Essential information to be supplied by the purcha
38、ser to the processor When ordering articles to be processed in accordance with this International Standard, the purchaser shall provide the following information in writing, in, for example, the contract, purchase order, or on the engineering drawing: a) the number of this International Standard, IS
39、O 26945, and article designation; b) the nature, condition and finish of the basis metal if they are likely to affect the serviceability and/or appearance of the coating (see 6.1); c) the significant surface of the article to be electroplated, indicated, for example, by drawings or by the provision
40、of suitably marked samples; d) additional part of surfaces where the minimum thickness requirements apply; e) positions where unavoidable contact marks and other defects are acceptable (see 6.2); f) any requirements for special pretreatment (see 6.1); g) tensile strength of parts and requirements fo
41、r heat treatment before and/or after electrodeposition (see 6.7 and 6.8); h) requirements, nature and thickness of undercoats (see 6.1 and 6.3); i) requirements for thickness, quality-evaluation test for controlling the quality and continuity of the coating and test method(s) to be used, and adhesio
42、n testing (see 6.4, 6.5 and 6.6); j) finish required, e.g. bright, dull or another type, accompanied by approved samples of the finish (see 6.2); k) the sampling plan to be adopted, and the acceptance levels (see Clause 7); l) any additional essential information. BS EN ISO 26945:2011ISO 26945:2011(
43、E) ISO 2011 All rights reserved 35 Designation 5.1 General The designation shall appear on engineering drawings, in the purchase order, the contract or in the detailed product specification. The designation specifies, in the following order, the basis metal, the specific alloy (optional), stress-rel
44、ief requirements, the type and thickness of undercoats (when present), the thickness and composition of alloy coating or coatings (when double or multilayer coatings are specified), and supplementary treatments, such as heat treatment to reduce susceptibility to hydrogen embrittlement. 5.2 Designati
45、on specification The designation shall comprise the following: a) the term “Electrodeposited coating”; b) the number of this International Standard, ISO 26945; c) a hyphen; d) the chemical symbol of the basis metal (see 5.3), e.g. Fe (iron or steel), followed by a solidus (/); e) the chemical symbol
46、 of the undercoat, e.g. Cu (copper) or Ni (nickel); f) stress-relief (SR) designation (see 5.4); g) a solidus (/); h) the chemical symbol(s) for the metal or alloy or coating(s); i) a number indicating the minimum local thickness, in micrometres, of the coating(s) followed by a solidus (/); j) hydro
47、gen-embrittlement-relief (ER) designation (see 5.4); k) if appropriate, codes indicating the type of any supplementary coating, followed by a solidus (/); l) if appropriate, codes designating any supplementary treatments. See 5.5 for examples of designations. 5.3 Basis metal The basis metal shall be
48、 designated by its chemical symbol, or its principal constituent, if it is an alloy. For example, Fe for iron and steel; Zn for zinc alloys; Cu for copper and copper alloys; Al for aluminium and aluminium alloys; Sn for tin and tin alloys; and Co for cobalt. In the case of non-metallic materials, th
49、e letters, NM, shall be used. It is recommended that the specific alloy be identified by its standard designation; for example, its UNS number or the local, national equivalent placed between the symbols . For example, Fe is the UNS designation for one high-strength steel (see Bibliography, Reference 1). BS EN ISO 26945:2011ISO 26945:2011(E) 4 ISO 2011 All rights reserved5.4 Designation of heat treatment requirements The heat treatment requirements shall be in brackets and designated as follow
