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1、BS ISO 26945:2008 ICS 25.220.40 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW BRITISH STANDARD Metallic and other inorganic coatings Electrodeposited coatings of tin-cobalt alloy Licensed Copy: London South Bank University, South Bank University, 02/02/2009 06:18, Uncontroll
2、ed Copy, (c) BSI This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 January 2009 BSI 2009 ISBN 978 0 580 58971 3 Amendments/corrigenda issued since publication DateComments BS ISO 26945:2008 National foreword This British Standard is the UK i
3、mplementation of ISO 26945:2008. 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 be obtained on request to its secretary. This publication does not purport to include
4、 all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard cannot confer immunity from legal obligations. Licensed Copy: London South Bank University, South Bank University, 02/02/2009 06:18, Uncontrolled Copy, (c) BSI BS ISO 26
5、945:2008 Reference number ISO 26945:2008(E) ISO 2008 INTERNATIONAL STANDARD ISO 26945 First edition 2008-12-15 Metallic and other inorganic coatings Electrodeposited coatings of tin-cobalt alloy Revtements mtalliques et autres revtements inorganiques Dpts lectrolytiques dalliage tain-cobalt Licensed
6、 Copy: London South Bank University, South Bank University, 02/02/2009 06:18, Uncontrolled Copy, (c) BSI BS ISO 26945:2008 ISO 26945:2008(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobes licensing policy, this file may be printed or viewed but shall not be ed
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9、odies. In the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below. COPYRIGHT PROTECTED DOCUMENT ISO 2008 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by an
10、y means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or ISOs member body in the country of the requester. ISO copyright office Case postale 56 CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail
11、copyrightiso.org Web www.iso.org Published in Switzerland ii ISO 2008 All rights reserved Licensed Copy: London South Bank University, South Bank University, 02/02/2009 06:18, Uncontrolled Copy, (c) BSI BS ISO 26945:2008 ISO 26945:2008(E) ISO 2008 All rights reserved iii Contents Page Foreword iv In
12、troduction v 1 Scope 1 2 Normative references1 3 Terms and definitions .2 4 Information to be supplied by the purchaser to the processor2 4.1 Required information 2 5 Designation 3 5.1 General3 5.2 Designation specification .3 5.3 Basis metal.3 5.4 Designation of heat treatment requirements3 5.5 Exa
13、mples 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 testing6 6.7 Stress relief heat treatment prior to electroplating7 6.8 Hydrogen-embrittlement-relief heat treatment after electroplating7 7 Sampling.7 Annex A (n
14、ormative) Methods of measuring the thickness of tin-cobalt alloy coatings 8 Bibliography10 Licensed Copy: London South Bank University, South Bank University, 02/02/2009 06:18, Uncontrolled Copy, (c) BSI BS ISO 26945:2008 ISO 26945:2008(E) iv ISO 2008 All rights reserved Foreword ISO (the Internatio
15、nal 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
16、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 standar
17、dization. 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 v
18、oting. 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 s
19、uch patent rights. ISO 26945 was prepared by Technical Committee ISO/TC 107, Metallic and other inorganic coatings. Licensed Copy: London South Bank University, South Bank University, 02/02/2009 06:18, Uncontrolled Copy, (c) BSI BS ISO 26945:2008 ISO 26945:2008(E) ISO 2008 All rights reserved v Intr
20、oduction 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
21、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 processe
22、s to a wide range of complicated shapes and sizes, e.g. nuts, bolts, rivets, etc. Licensed Copy: London South Bank University, South Bank University, 02/02/2009 06:18, Uncontrolled Copy, (c) BSI BS ISO 26945:2008 Licensed Copy: London South Bank University, South Bank University, 02/02/2009 06:18, U
23、ncontrolled Copy, (c) BSI BS ISO 26945:2008 INTERNATIONAL STANDARD ISO 26945:2008(E) ISO 2008 All rights reserved 1 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 legis
24、lation, 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
25、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 o
26、bligations. 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 m to 0,3 m thickness. Hardness and wear resis
27、tance 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 condi
28、tion 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 an
29、y 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 inorganic coatings Surface treatment, me
30、tallic and other inorganic coatings Vocabulary ISO 2819, Metallic coatings on metallic substrates Electrodeposited and chemically deposited coatings Review of methods available for testing adhesion ISO 3497, Metallic coatings Measurements of coating thickness X-ray spectrometric methods ISO 4519, El
31、ectrodeposited metallic coatings and related finishes Sampling procedures for inspection by attributes ISO 4541, Metallic and other non-organic coatings Corrodkote corrosion test (CORR test) ISO 9220, Metallic coatings Measurement of coating thickness Scanning electron microscope method Licensed Cop
32、y: London South Bank University, South Bank University, 02/02/2009 06:18, Uncontrolled Copy, (c) BSI BS ISO 26945:2008 ISO 26945:2008(E) 2 ISO 2008 All rights reserved ISO 9587, Metallic and other inorganic coatings Pretreatment of iron or steel to reduce the risk of hydrogen embrittlement ISO 9588,
33、 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 substrates Rating of test specimens and manufactured articles subjected to corros
34、ion 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 inorganic coatings Electrochemical measurement of diffusible hydrogen in steels Ba
35、rnacle electrode method ASTM B117, Standard Practice for Operating Salt Spray (Fog) Apparatus ASTM B368, Standard Method for Copper-Accelerated Acetic Acid-Salt Spray (Fog) Testing (CASS Test) 3 Terms and definitions For the purposes of this document, the terms and definitions given in ISO 2064, ISO
36、 2080, ISO 9587 and ISO 9588 apply. 4 Information to be supplied by the purchaser to the processor 4.1 Required information When ordering articles to be processed in accordance with this International Standard, the purchaser shall provide the following information in writing, in e.g. the contract, p
37、urchase order, or on the engineering drawing: a) the number of this International Standard, ISO 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 surfac
38、e of the article to be electroplated, as indicated, for example, by drawings or by the provision of suitably marked samples; d) additional parts of surfaces where minimum thickness requirements apply; e) positions where unavoidable contact marks and other defects are acceptable (see 6.2); f) any req
39、uirements for special pretreatment (see 6.1); g) tensile strength of parts and requirements for heat treatment before and/or after electrodeposition (see 6.7 and 6.8); h) requirements, nature and thickness of undercoats (see 6.3); i) requirements for thickness, accelerated corrosion and adhesion tes
40、ting (see 6.4, 6.5 and 6.6); j) finish required, e.g. bright, dull or other 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. Licensed Copy: London South Bank Universit
41、y, South Bank University, 02/02/2009 06:18, Uncontrolled Copy, (c) BSI BS ISO 26945:2008 ISO 26945:2008(E) ISO 2008 All rights reserved 3 5 Designation 5.1 General The article designation shall appear on engineering drawings, in the purchase order, in the contract or in the detailed product specific
42、ation. The designation specifies, in the following order, the basis metal, the specific alloy (optional), stress relief requirements, the type and thickness of undercoats (when present), the thickness and composition of alloy coating or coatings (in the order of application when double or multilayer
43、 coatings are specified), and supplementary treatments, such as heat treatment to reduce susceptibility to hydrogen embrittlement. 5.2 Designation specification The designation shall comprise: a) the term, Electrodeposited coating; b) the number of this International Standard, ISO 26945; c) a hyphen
44、; 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 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 coa
45、ting(s); i) a number indicating the minimum local thickness, in micrometres, of the coating(s) followed by a solidus; j) hydrogen-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, code
46、s designating any supplementary treatments. See 5.5 for examples of designations. 5.3 Basis metal The basis metal shall be designated by its chemical symbol, or its principal constituent if an alloy. For example, Fe for iron and steel; Zn for zinc alloys; Cu for copper and copper alloys, Al for alum
47、inium and aluminium alloys, Sn for tin and tin alloys, and Co for cobalt. In the case of non-metallic materials, the 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 b
48、etween the symbols, . For example, Fe is the UNS designation for one high-strength steel (see Reference 1). 5.4 Designation of heat treatment requirements The heat treatment requirements shall be in brackets and designated as follows: Licensed Copy: London South Bank University, South Bank Universit
49、y, 02/02/2009 06:18, Uncontrolled Copy, (c) BSI BS ISO 26945:2008 ISO 26945:2008(E) 4 ISO 2008 All rights reserved a) the letters, SR, for stress relief heat treatment prior to electroplating, the letters, ER, for hydrogen- embrittlement-relief heat treatment after electroplating, and the letters, HT for heat treatment for other purposes; b) in parentheses, the minimum temperature, C; c) the duration of heat treatment, in hours. For example, SR(210)1 designates stress relief heat tr