1、January 2009DEUTSCHE NORM English price group 13No part of this standard may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS 25.220.40!$UKW“1504052
2、www.din.deDDIN EN ISO 4521Metallic and other inorganic coatings Electrodeposited silver and silver alloy coatings for engineeringpurposes Specification and test methods (ISO 4521:2008)English version of DIN EN ISO 4521:2009-01Metallische berzge und andere anorganische berzge Galvanische Silber- und
3、Silberlegierungs-berzge fr technische Zwecke Anforderungen und Prfverfahren (ISO 4521:2008)Englische Fassung DIN EN ISO 4521:2009-01www.beuth.deDocument comprises 27 pagesDIN EN ISO 4521:2009-01 2 National foreword This standard has been prepared by Technical Committee ISO/TC 107 “Metallic and other
4、 inorganic coatings” (Secretariat: KATS, Republic of Korea). In accordance with the Agreement on technical cooperation between ISO and CEN (Vienna Agreement), ISO 4521:2008 has been adopted by Technical Committee CEN/TC 262 “Metallic and other inorganic coatings” (Secretariat: BSI, United Kingdom) a
5、s a European Standard. The responsible German body involved in its preparation was the Normenausschuss Materialprfung (Materials Testing Standards Committee), Technical Committee NA 062-01-76 AA Galvanische berzge. The DIN Standards corresponding to the International Standards referred to in clause
6、2 of this document are as follows: ISO 1463 DIN EN ISO 1463 ISO 2064 DIN EN ISO 2064 ISO 2177 DIN EN ISO 2177 ISO 2178 DIN EN ISO 2178 ISO 3497 DIN EN ISO 3497 ISO 3543 DIN EN ISO 3543 ISO 3868 DIN EN ISO 3868 ISO 4516 DIN EN ISO 4516 ISO 4518 DIN EN ISO 4518 ISO 4538 DIN EN ISO 4538 ISO 10111 DIN E
7、N ISO 10111 ISO 10289 DIN EN ISO 10289 ISO 10308 DIN EN ISO 10308 ISO 12687 DIN EN ISO 12687 National Annex NA (informative) Bibliography DIN EN ISO 1463:2004-08, Metallic and oxide coatings Measurement of coating thickness Microscopi-cal method DIN EN ISO 2064:2000-06, Metallic and other inorganic
8、coatings Definitions and conventions concerning the measurement of thickness DIN EN ISO 2177:2004-08, Metallic coatings Measurement of coating thickness Coulometric method by anodic dissolution DIN EN ISO 2178:1995-04, Non-magnetic coatings on magnetic substrates Measurement of coating thickness by
9、the magnetic method DIN EN ISO 3497:2001-12, Metallic coatings Measurement of coating thickness X-ray spectrometric methods DIN EN ISO 4521:2009-01 3 DIN EN ISO 3543:2001-12, Metallic and non-metallic coatings Measurement of thickness Beta backscatter method DIN EN ISO 3868:1995-01, Metallic and oth
10、er non-organic coatings Measurement of coating thickness by the Fizeau multiple-beam interferometric method DIN EN ISO 4516:2002-10, Metallic and other inorganic coatings Vickers and Knoop microhardness tests DIN EN ISO 4518:1995-04, Metallic coatings Measurement of coating thickness by the profilom
11、etric method DIN EN ISO 4538:1995-04, Metallic coatings Thioacetamide corrosion test (TAA test) DIN EN ISO 10111:2002-03, Metallic and other inorganic coatings Measurement of mass per unit area Review of gravimetric and chemical analysis methods DIN EN ISO 10289:2001-04, Methods for corrosion testin
12、g of metallic and other inorganic coatings on metallic substrates Rating of test specimens and manufactured articles subjected to corrosion tests DIN EN ISO 10308:2006-04, Metallic coatings Review of porosity tests DIN EN ISO 12687:1998-09, Metallic coatings Porosity tests Humid sulfur (flowers of s
13、ulfur) test DIN EN ISO 4521:2009-01 4 This page is intentionally blank EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 4521 September 2008 ICS 25.220.40 English Version Metallic and other inorganic coatings - Electrodeposited silver and silver alloy coatings for engineering purposes - Speci
14、fication and test methods (ISO 4521:2008) Revtements mtalliques et autres revtements inorganiques - Dpts lectrolytiques dargent et dalliages dargent pour applications industrielles - Spcifications et mthodes dessai (ISO 4521:2008) Metallische berzge und andere anorganische berzge -Galvanische Silber
15、- und Silberlegierungs-berzge fr technische Zwecke - Anforderungen und Prfverfahren (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
16、 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, G
17、erman). 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, Czec
18、h 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 COMIT EUROP
19、EN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels 2008 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 4521:2008: EContents Page 2 DIN EN ISO 4521:2009-01 EN ISO 4521:2008
20、 (E) Foreword .3 Introduction.4 1 Scope5 2 Normative references5 3 Terms and definitions .6 4 Information to be supplied by the purchaser to the electroplater .6 4.1 Essential information6 4.2 Additional information 7 5 Designation 7 5.1 General .7 5.2 Designation specifications.8 5.3 Designation of
21、 the basis material8 5.4 Designation of heat treatment requirements8 5.5 Examples of designations 9 6 Requirements.9 6.1 General .9 6.2 Appearance 9 6.3 Thickness .10 6.4 Porosity 10 6.5 Accelerated corrosion testing10 6.6 Composition.10 6.7 Stress-relief heat treatment prior to electroplating .10 6
22、.8 Hydrogen-embrittlement-relief heat treatment after electroplating .10 6.9 Adhesion 11 6.10 Electrical properties11 6.11 Microhardness .11 6.12 Solderability .11 6.13 Wear resistance.11 6.14 Ductility.11 6.15 Undercoats.11 6.16 Freedom from contamination.12 6.17 Anti-tarnish treatments.12 7 Sampli
23、ng 12 Annex A (normative) Requirements for undercoats .13 Annex B (normative) Methods of measuring the thickness of electroplated silver and silver alloy coatings15 Annex C (normative) Adhesion tests19 Annex D (normative) Determination of the presence of residual salts .21 Bibliography23 Foreword 3
24、DIN EN ISO 4521:2009-01 EN ISO 4521:2008 (E) 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 B
25、SI. 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 o
26、f 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 impleme
27、nt 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 an
28、d 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. Introduction Electrodeposited silver and silver alloy coatings are often specified for their extremely good electrical conductivity, but corrosion protection is
29、 often an additional requirement for electrical, electronic and other applications. In many conditions of service, sulfide films may form on the coatings, increasing the contact resistance at the silver electroplated mating surface and making them unsuitable for use in low-voltage electronic circuit
30、s. Sulfide films are not especially detrimental to other electronic applications where higher voltage and higher contact pressures are used, because the films are not completely insulating. Because the appearance and serviceability of electroplated silver coatings depend on the condition of the basi
31、s material, agreement should be reached between interested parties that the surface finish and roughness of the basis material are satisfactory for electroplating. Electroplated silver coatings have been used as bearing surfaces for many decades and are particularly useful where the load-bearing sur
32、faces are not well lubricated. Electroplated silver coatings have largely replaced electroplated gold coatings on metallic lead frames, the devices that support the majority of silicon chips. 4 DIN EN ISO 4521:2009-01 EN ISO 4521:2008 (E) WARNING This International Standard may not be compliant with
33、 some countries health and safety legislations 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 legislations associated
34、 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 n
35、ot, in itself, confer immunity from legal obligations. 1 Scope This International Standard specifies requirements for electroplated silver and silver alloy coatings for electrical, electronic and other engineering applications, including test methods. Engineering applications are defined as those in
36、 which the coating essentially serves a non-decorative purpose. Although this International Standard does not specify the condition, finish or surface roughness of the basis material prior to electroplating, the appearance and serviceability of electroplated silver and silver alloy coatings depend o
37、n the condition of the basis material. It is essential that the purchaser specifies the surface finish and roughness of the basis material in order to conform to the product requirements. This International Standard does not apply to coatings on screw threads or to coatings on sheet, strip or wire i
38、n the 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 applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
39、 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, metallic and other inorg
40、anic coatings Vocabulary ISO 2177, Metallic coatings Measurement of coating thickness Coulometric method by anodic dissolution ISO 2178, Non-magnetic coatings on magnetic substrates Measurement of coating thickness Magnetic method ISO 3497, Metallic coatings Measurement of coating thickness X-ray sp
41、ectrometric methods 5 DIN EN ISO 4521:2009-01 EN ISO 4521:2008 (E) ISO 3543, Metallic and non-metallic coatings Measurement of thickness Beta backscatter method ISO 3868, Metallic and other non-organic coatings Measurement of coating thicknesses Fizeau multiple-beam interferometry method ISO 4516, M
42、etallic and other inorganic coatings Vickers and Knoop microhardness tests ISO 4518, Metallic coatings Measurement of coating thickness Profilometric method ISO 4519:1980, Electrodeposited metallic coatings and related finishes Sampling procedures for inspection by attributes ISO 4538, Metallic coat
43、ings Thioacetamide corrosion test (TAA test) 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 and steel to reduce the risk of hydrogen embrittleme
44、nt ISO 10111, Metallic and other inorganic coatings Measurement of mass per unit area Review of gravimetric and chemical analysis methods ISO 10289, Methods for corrosion testing of metallic and other inorganic coatings on metallic substrates Rating of test specimens and manufactured articles subjec
45、ted to corrosion tests ISO 10308, Metallic coatings Review of porosity 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 12687, Metallic coatings Porosity tests H
46、umid sulfur (flowers of sulfur) test ISO 14647, Metallic coatings Determination of porosity in gold coatings on metal substrates Nitric acid vapour test ISO 15724, Metallic and other inorganic coatings Electrochemical measurement of diffusible hydrogen in steels Barnacle electrode method IEC 60068-2
47、-20, Basic environmental testing procedures Part 2: Tests. Test T: Soldering 3 Terms and definitions For the purposes of this document, the terms and definitions given in ISO 2064 and ISO 2080 apply. 4 Information to be supplied by the purchaser to the electroplater 4.1 Essential information The fol
48、lowing information shall be supplied by the purchaser to the electroplater in writing, for example, in the purchase order or contract, or on engineering drawings: a) the number of this International Standard (ISO 4521) and the designation (see Clause 5); b) the significant surface indicated, for exa
49、mple, on drawings or by the provision of suitably marked samples; 6 DIN EN ISO 4521:2009-01 EN ISO 4521:2008 (E) 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; d) the position on the surface of unavoidable defects, such as rack marks (see 6.2); e) the finish required, for example, bright, dull or another type, preferably ac
