ISO INTERNATIONAL 6158 STANDARD Fourth edition 2018-11 Metallic and other inorganic coatings Electrodeposited coatings of chromium for engineering purposes Revetements metalliques etautres revetements inorganiques- Depots electrolytiques de chrome pour usages industriels Referencenumber IS0 6158:2018(E) ISO @ IS0 2018 IS06158:2018(E) COPYRIGHTPROTECTEDDOCUMENT IS02018 All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission. Permission can be requested from either IsO at the address below or IsO's member body in the country of the requester: ISO copyright office CP 40i : Ch. de Blandonnet 8 CH-1214 Vernier, Geneva Phone: +4122.749 0111 Fax: +41 22 749 09 47 Email:[email protected] Website: www.iso.org Published in Switzerland ii IS02018-Allrights reserved IS06158:2018(E) Contents Page Foreword iv Introduction V 1 Scope. .1 2 Normativereferences .1 .2 3 Terms and definitions 4 Informationtobesuppliedbythepurchasertotheprocessor .2 5 Designation .3 5.1 General. 3 5.2 Designation specification 3 5.3 Designation of basis metal 3 5.4 Designation ofheattreatment requirements 4 5.5 Designation of type and thickness of metal coating 4 5.6 Examples of designations. 5 Requirements 5 6 6.1 Specialtest specimens 5 6.2 Appearance 5 6.3 Surface finish 6 6.4 Thickness 6 6.5 Hardness. 6 6.6 Adhesion 6 6.7 Porosity 7 6.8 Stress relief heat treatment prior to coating 6.9 Hydrogen-embrittlement-reliefheattreatment 7 6.10 Peening of metal parts. 7 6.11 Use ofundercoats 8 6.12 Stripping. 8 6.13 Corrosion resistance/multilayer chromium plating 8 6.14 Surfaceroughnessofelectroplatedmetallicchromiumcoating 8 7 Sampling. .8 AnnexA(informative)Typicalthickness ofmetallicchromiumcoatingsspecifiedin engineeringapplications 9 AnnexB (normative)Thicknesstestmethodsforelectroplated metallicchromiumand othermetalliccoatings .10 Annex C (normative) Determination of cracks and pores in metallic chromium coatings. .11 AnnexD (normative)Classification of different quality/grate ofroughness of electrodeposited metallic chromium coatings .12 Bibliography .13 @ IS0 2018 - All rights reserved iii