BS EN ISO 27874-2008 Metallic and other inorganic coatings - Electrodeposited gold nand gold alloy coatings for electrical electronic and engineering npurposes - Specification and .pdf

1、BS EN ISO27874:2008ICS 25.220.40,NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBRITISH STANDARDMetallic and otherinorganic coatings Electrodepositedgold and gold alloycoatings for electrical,electronic andengineering purposes Specification andtest methods (ISO27874:2008)This

2、British Standardwas published underthe authority of theStandards Policy andStrategy Committee on 30November 2008 BSI 2008ISBN 978 0 580 59218 8Amendments/corrigenda issued since publicationDate CommentsBS EN ISO 27874:2008National forewordThis British Standard is the UK implementation of EN ISO 2787

3、4:2008.It supersedes BS4292-1:1989 and BS6670-1:1986 and BS6670-4:1986 andBS6670-5:1986 which are withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee STI/33, Electrodeposited and related coatings.A list of organizations represented on this committee can be obtained

4、onrequest to its secretary.This publication does not purport to include all the necessary provisionsof a contract. Users are responsible for its correct application.Compliance with a British Standard cannot confer immunityfrom legal obligations.EUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN ISO 2

5、7874September 2008ICS 25.220.40English VersionMetallic and other inorganic coatings - Electrodeposited goldand gold alloy coatings for electrical, electronic and engineeringpurposes - Specification and test methods (ISO 27874:2008)Revtements mtalliques et autres revtementsinorganiques - Dpts lectrol

6、ytiques dor et dalliages dorpour usages lectrique, lectronique et industriels -Spcification et mthodes dessai (ISO 27874:2008)Metallische berzge - Galvanische Gold- undGoldlegierungsberzge fr elektrische, elektronische undtechnische Zwecke - Anforderungen und Prfverfahren(ISO 27874:2008)This Europea

7、n Standard was approved by CEN on 13 September 2008.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references conc

8、erning such nationalstandards 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 translationunder the responsibility of a CEN member into its own

9、language and notified to the CEN Management Centre has the same status as theofficial 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,

10、Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre: rue de Stassart, 36 B-1050 Brussels 2008 CEN All ri

11、ghts of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN ISO 27874:2008: EBS EN ISO 27874:2008EN ISO 27874:2008 (E) 3 Foreword This document (EN ISO 27874:2008) has been prepared by Technical Committee ISO/TC 107 “Metallic and other inorganic coatings“

12、 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, a

13、nd 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. Acco

14、rding 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, Latv

15、ia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. Endorsement notice The text of ISO 27874:2008 has been approved by CEN as a EN ISO 27874:2008 without any modification. BS EN ISO 27874:2008ISO 278

16、74:2008(E) ISO 2008 All rights reserved iiiContents Page Foreword iv Introduction v 1 Scope . 1 2 Normative references . 1 3 Terms and definitions. 2 4 Information to be supplied to the electroplater .3 5 Designation . 4 6 Requirements and test methods. 6 7 Sampling 9 Annex A (normative) Requirement

17、s for undercoats. 10 Annex B (normative) Methods of measuring the thickness of gold and gold alloy coatings 12 Annex C (normative) Adhesion tests . 20 Annex D (normative) Determination of gold content 22 Bibliography . 24 BS EN ISO 27874:2008ISO 27874:2008(E) iv ISO 2008 All rights reservedForeword

18、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

19、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 elect

20、rotechnical 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

21、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 ident

22、ifying any or all such patent rights. ISO 27874 was prepared by Technical Committee ISO/TC 107, Metallic and other inorganic coatings, Subcommittee SC 3, Electrodeposited coatings and related finishes. This first edition of ISO 27874 cancels and replaces ISO 4523:1985, ISO 4524-1:1985, ISO 4524-4:19

23、85 and ISO 4524-5:1985, of which it constitutes a technical revision. BS EN ISO 27874:2008ISO 27874:2008(E) ISO 2008 All rights reserved vIntroduction The engineering uses of electrodeposited gold and gold alloy coatings have expanded with the growth of the electrical and electronic industries. Low

24、voltages and currents, dry circuits and microwave frequencies require low-resistance interconnection systems, connectors and waveguides. Non-tarnishing, low-resistance gold coatings were the logical choice for connectors where the stability of contact surfaces was critical. The need to improve the w

25、ear resistance of gold coatings led to the development of new electroplating solutions containing controlled amounts of metallic and non-metallic additives that either changed the composition or altered the crystal structure of the coating. The special needs of the printed-circuit industry led to th

26、e development of acid gold electroplating solutions that contained no free cyanide, yielding coatings that are hard, bright and solderable. Formulations for high-speed electroplating up to current densities of 200 A/dm2were introduced for continuous strip, stripe or spot gold and gold alloy coatings

27、. The high cost of gold metal has led to the development of selective and thickness profile plating techniques to limit the use of the metal to the active areas only of the components, where the gold is required. Designers will therefore often specify the area requiring gold electroplating as well a

28、s the thickness profile, if required, by reference to suitably marked drawings. With the introduction of many new gold electroplating formulations and the proliferation of engineering applications, the need for technical standards that specify the requirements of electrodeposited gold and gold alloy

29、 coatings, as well as the test methods to ensure that the specified requirements are met, is critical. Composition, appearance, hardness, thickness, purity, porosity, wear resistance, solderability, electrical contact resistance, infrared reflectivity and other properties must be controlled to produ

30、ce high-quality gold and gold alloy coatings for engineering purposes. BS EN ISO 27874:2008BS EN ISO 27874:2008INTERNATIONAL STANDARD ISO 27874:2008(E) ISO 2008 All rights reserved 1Metallic and other inorganic coatings Electrodeposited gold and gold alloy coatings for electrical, electronic and eng

31、ineering purposes Specification and test methods WARNING This International Standard may not be compliant with some countries health, safety and environmental legislations. It calls for the use of substances and/or procedures that may be injurious to health if adequate safety measures are not taken.

32、 This International Standard does not address any health hazards, safety or environmental matters, or 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 app

33、ropriate action to comply with any national, regional and/or international regulations. Compliance with this International Standard does not, of itself, confer immunity from legal obligations. 1 Scope This International Standard specifies the requirements for electrodeposited gold and gold alloy coa

34、tings for electrical, electronic and other engineering applications on metallic and non-metallic substrates. It also specifies test methods for measuring the properties of the coatings. Although this International Standard does not specify the condition, finish or surface roughness of the basis mate

35、rial prior to electroplating, the appearance and serviceability of electroplated gold or gold alloy coatings depends on the condition of the basis material. It is essential that the purchaser specify the surface finish and roughness of the basis material in order to conform to the product requiremen

36、ts. This International Standard does not apply to coatings on threaded articles or to coatings on sheet or strip in non-fabricated form. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited appl

37、ies. 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 measur

38、ement of thickness ISO 2080, Metallic and other inorganic coatings Surface treatment, metallic and other inorganic coatings Vocabulary ISO 2177, Metallic coatings Measurement of coating thickness Coulometric method by anodic dissolution ISO 2819, Metallic coatings on metallic substrates Electrodepos

39、ited and chemically deposited coatings Review of methods available for testing adhesion ISO 3497, Metallic coatings Measurement of coating thickness X-ray spectrometric methods BS EN ISO 27874:2008ISO 27874:2008(E) 2 ISO 2008 All rights reservedISO 3543, Metallic and non-metallic coatings Measuremen

40、t of thickness Beta backscatter method ISO 3868, Metallic and other non-organic coatings Measurement of coating thicknesses Fizeau multiple-beam interferometry method ISO 3882, Metallic and other inorganic coatings Review of methods of measurement of thickness ISO 4516, Metallic and other inorganic

41、coatings Vickers and Knoop microhardness tests ISO 4518, Metallic coatings Measurement of coating thickness Profilometric method ISO 4519, Electrodeposited metallic coatings and related finishes Sampling procedures for inspection by attributes ISO 4524-2, Metallic coatings Test methods for electrode

42、posited gold and gold alloy coatings Part 2: Mixed flowing gas (MFG) environmental tests ISO 4524-3:1985, Metallic coatings Test methods for electrodeposited gold and gold alloy coatings Part 3: Electrographic tests for porosity ISO 4524-6, Metallic coatings Test methods for electrodeposited gold an

43、d gold alloy coatings Part 6: Determination of the presence of residual salts ISO 9587, Metallic and other inorganic coatings Pretreatment 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

44、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 corrosion tests ISO 10308, Metallic coatings Review of porosity tests ISO 12687, Metallic coatin

45、gs Porosity tests Humid sulfur (flowers of sulfur) test ISO 14647, Metallic coatings Determination of porosity in gold coatings on metal substrates Nitric acid vapour test IEC 60068-2-20, Environmental testing Part 2-20: Tests Test T: Test methods for solderability and resistance to soldering heat o

46、f devices with leads 3 Terms and definitions For the purposes of this document, the terms and definitions given in ISO 2064 and ISO 2080 and the following apply. 3.1 gold or gold alloy coating electrodeposited gold or gold alloy having intentional alloying elements in its composition 3.2 double-laye

47、r gold or gold alloy coating gold or gold alloy coating consisting of two discrete layers of differing gold contents 3.3 multilayer gold or gold alloy coating gold or gold alloy coating consisting of more than two discrete layers of differing gold contents BS EN ISO 27874:2008ISO 27874:2008(E) ISO 2

48、008 All rights reserved 34 Information to be supplied to the electroplater 4.1 Essential information The following information shall be supplied by the purchaser to the electroplater in writing in the purchase order or contract, or on engineering drawings: a) the designation (see Clause 5); b) the s

49、ignificant surface of the article, indicated, for example, as dimensioned areas on drawings or by the provision of suitably marked samples; c) the nature, condition and finish of the basis metal if they are likely to affect the serviceability and/or the appearance of the coating (see Clause 1); d) the position on the surface of any unavoidable defects, such as rack marks (see 6.2); e) the finish required, for example bright, dull or another type, preferably acc