ISO INTERNATIONAL STANDARD 4527 Second edition 2003-05-15 Metallic coatings Autocatalytic (electroless) nickel-phosphorus alloy coatings Specification and test methods Revetements metalliques Dépots autocatalytiques (sans courant) d'alliages de nickel-phosphore - Spécifications et méthodes d'essai Reference number ISO 4527:2003(E) ISO @ISO2003 py IHS under lic itted without license from IHS Not for Resale ISO 4527:2003(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 trademarkof AdobeSystems 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 ?ISO2003 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 [email protected] Web www.iso.org Published in Switzerland ationalgazaiSandardizato @Iso2003-All rightsreserved ermittedwithoutlicense from IHS Not for Resale ISO 4527:2003(E) Contents Page Foreword. iv Introduction. V 1 Scope.. 2 Normative references .... 3 Terms and definitions. 4 Information to be supplied to the producer of the coating.... 4.1 Essential information.... 4.2 Additional information.... 5 Designation of basis metal, metal layers and heat treatment requirements .. 5.1 General.... 5.2 Designating the basis metal.... 5.3 Designation of heat treatment requirements ..... 5.4 Designating the type and thickness of metal layers .... 5.5 Examples of designations... 6 Requirements. 6.1 Special test specimens... 6.2 Appearance.... 6.3 Surface finish 6.4 Thickness. 6.5 Hardness 6.6 Adhesion... 6.7 Porosity. 6.8 Corrosion resistance .. 6.9 Stress relief heat treatment prior to coating ...... 6.10 Hydrogen embrittlement relief heat treatment after coating 6.11 Heat treatment to harden the coating .... 6.12 Heat treatment to improve adhesion.. 6.13 Wear resistance...... 6.14 Solderability... 6.15 Chemical composition... 6.16 Peening of metal parts... 6.17 Undercoats and overcoats ... 7 Samp.ling ........ Annex A (normative) Heat treatment to improve adhesion and increase hardness 9 Annex B (informative) Thickness test methods ........ Annex C (informative) Guidance on tnickness, composition and use of autocataiytic nickel-phosphorus coatings .. .15 Annex D (normative) Methods for chemical analysis of autocatalytic nickel coatings for phosphorus content . 18 Bibliography ... .22 CopyrghtInternational Organizainsandardizationrightsreserved ted without license from IHS Not for Resale ISO 4527:2003(E) Foreword 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 International Standards are drafted in accordance with the rules given in the ISO/lEc Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards 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 such patent rights. Subcommittee Sc 3, Electrodeposited coatings and