BS ISO BRITISH STANDARD 22778:2006 Metallic coatings - Physical vapour-deposited coatings ofcadmium on iron and steel - Specification and test methods ICS 25.220.40 BSi NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW British Standards BSIS022778:2006 National foreword This British Standard was published by BSI. It is the UK implementation of ISO 22778:2006. The UK participation in its preparation was entrusted to Technical Committee STI/33, Electrodeposited and related coatings. A list of organizations represented on STI/33 can be obtained on request to its secretary. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard cannot confer immunity from legal obligations. This British Standard was Amendmentsissuedsincepublication published under the authority of the Standards Policy and Date Amd. No. Comments Strategy Committee on 30 November 2006 BSI 2006 ISBN 0 580497437 BSIS022778:2006 ISO INTERNATIONAL STANDARD 22778 First edition 2006-11-15 Metallic coatings Physical vapour-deposited coatings of cadmium on iron and steel Specification and test methods Revetementsmetalliques-Revetementsdecadmiumappliquespar videsurferetacierSpécificationetmethodesd'essai Reference number ISO 22778:2006(E) ii BS ISO 22778:2006 Contents Page Foreword iv Introduction 1 Scope 2 Normativereferences. 3 Term(s) and definition(s) 4 Informationtobesuppliedbythepurchasertotheprocessor. 5 Designation 6 Requirements.. 5 7 Sampling.. 6 8 Rejection.. Annex A(informative)Additional information concerning equipment,substratepreparation,and process parameters.... 10 Annex B (normative)Determination of the average thickness of cadmium coatings.. 12 AnnexC (normative)Adhesiontestmethods.. AnnexD (normative)Sampling... 14 Bibliography .. 15 ili BSIS0 22778:2006 Foreword IsO (the International Organization for Standardization) is a worldwide federation of national standards bodies technical committees. Each member body interested in a subject for which a technical committee has been InternationalElectrotechnicalCommission(lEC)onallmattersofelectrotechnicalstandardization International Standards are drafted in accordance with the rules given in the ISO/lEC Directives, Part 2 adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote rights. IsO shall not be held responsible for identifying any or all such patent rights. SubcommitteeSC3,Electrodepositedcoatingsandrelatedfinishes iv BSIS022778:2006 Introduction enhance appearance and improve resistance to corrosion.Unlike electroplating,physical vapour deposition does not introduce hydrogen into the basis material. Hence, vapour-deposited cadmium coatings are Hydrogen, however, can be introduced into the substrate during fabrication, cleaning, pickling and other There remain, nevertheless, critical applications, often aerospace-related, where the unique properties of and low contact resistance, make continued use necessary. One benefit of depositing cadmium by physica cadmium is at an absolute minimum.