ISO INTERNATIONAL STANDARD 4521 Second edition 2008-09-01 Metallic and other inorganic coatings Electrodeposited silver and silver alloy coatings for engineering purposes Specification and test methods Revetements metalliques et autres revetements inorganiques Dépots électrolytiques d'argent et d'alliages d'argent pour applications industrielles - Spécifications et méthodes d'essai Reference number ISO 4521:2008(E) @ ISO 2008 by IHS under ted without license from IHS Not for Resale ISO 4521:2008(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobe's licensing policy, this file may be printed or viewed but shall not be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In accepts no liability in this area. Adobe is a trademark of Adobe Systems Incorporated. Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation parameters were optimized for printing. Every care has been taken to ensure that the file is suitable for use by IsO member bodies. In the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below COPYRIGHTPROTECTEDDOCUMENT @ ISO2008 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, IsO's 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 copyright@iso.org Web www.iso.org Published in Switzerland @ Iso 2008 - All rights reserved ed without license from IHS Not for Resale ISO 4521:2008(E) Contents Page Foreword. Introduction 1 Scope 2 Normative references . 3 Terms and definitions 4 Information to be supplied by the purchaser to the electroplater 4.1 Essential information .... 4.2 Additional information.. 5 Designation 5.1 Genera.... 5.2 Designation specifications .. 5.3 Designation of the basis material . 5.4 Designation of heat treatment requirements 5.5 Examples of designations ....... 6 Requirements, 6.1 General. 6.2 Appearance 6.3 Thickness 6.4 Porosity. 6.5 Accelerated corrosion testing. 6.6 Composition .... 6.7 Stress-relief heat treatment prior to electroplating.. 6.8 Hydrogen-embrittlement-relief heat treatment after electroplating.... 6.9 Adhesion... 6.10 Electrical properties . 6.11 Microhardness .. 6.12 Solderability 6.13 Wear resistance 6.14 Ductility. 6.15 Undercoats 6.16 Freedom from contamination 6.17 Anti-tarnish treatments .... 7 Sampling...... Annex A (normative) Requirements for undercoats... Annex B (normative) Methods of measuring the thickness of electroplated silver and silver alloy coatings...... 11 Annex C (normative) Adhesion tests .... Annex D (normative) Determination of the presence of residual salts . Bibliography.... Copyrght International Organizaion for standardizllon ghts reserved ii Not for Resale