ISO INTERNATIONAL STANDARD 15721 First edition 2001-04-15 Metallic coatings Porosity tests - Porosity in gold or palladium coatings by sulfurous acid/sulfur dioxide vapour Revetements métalliques-Essais de porositePorosité des revetements d'or ou de palladium par essai a I'acide sulfureux/vapeur de dioxyde de soufre Reference number ISO 15721:2001(E) ISO @ ISO 2001 by IHS under lic ted without license from IHS Not for Resale ISO 15721:2001(E) PDFdisclaimer 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 downloading this area. Adobe is a trademarkof 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 @ISO2001 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or 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.ch Web www.iso.ch Printed in Switzerland @ISO2001-All rightsreserved py IHS unde ermittedwithoutlicense from IHS Not for Resale ISO 15721:2001(E) Contents Page Foreword. Introduction 1 Scope 2 Normative references 3 Terms and definitions 4 Apparatus 5 Reagents 6 Safety hazards. 7 Procedure 8 Examination 9 Precision. 10 Test report. Annex A (informative) Significance and use ili d by IHS under license with nse from IHS Not for Resale