ISO INTERNATIONAL STANDARD 17668 First edition 2016-02-01 Zinc diffusion coatings on ferrous products Sherardizing Specification Revetements par diffusion de zinc sur les produits ferreux - Shérardisation - Spécification Reference number ISO 17668:2016(E) ISO International Organization for Standardization see=ZHEJIANG INST OF STANDARDIZATION C1 5956617 @IS02016 vided by IHS under No reproduction or networking permitted without license from IHS IS0 17668:2016(E) COPYRIGHT PROTECTED DOCUMENT IS0 2016, Published in Switzerland All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form written permission. Permission can be requested from either Iso at the address below or Iso's member body in the country of the requester. ISOcopyrightoffice Ch. de Blandonnet 8 · CP 401 CH-1214 Vernier, Geneva, Switzerland Tel. +41 22 749 01 11 Fax +41 22 749 09 47 copyright@iso.org www.iso.org Internatinir DrganizationforStandardization Licensee-ZHEJIANG INST.OF STANDARDIZoISQ 6 - All rights reserved Not for Resale, 2016/4/22 07:53:32 networking permited withoutlicense from IHS IS0 17668:2016(E) Contents Page Foreword ..iv Introduction. ..V 1 Scope. ..1 2 Normative references 3 Terms and definitions ..1 4 General requirements .3 4.1 Surface condition base material .3 4.2 Information to be supplied by the purchaser .3 5 Acceptance inspection and sampling .3 6 Coating properties. .4 6.1 Appearance. .4 6.2 Thickness. ..4 6.2.1 General .4 6.2.2 Test methods .4 6.2.3 Reference areas .5 6.2.4 Magnetic method or electro-magnetic method 5 6.2.5 Gravimetric method 5 6.2.6 Thickness requirements .5 6.3 Acceptancecriteria. .6 6.4 Additional clearances for threaded components .6 7 Ceritificate of compliance ..6 Annex A (normative) Information to be supplied by the purchaser to the sherardizer ..7 AnnexB(informative)Determinationofthickness .8 Annex C (informative) General information ..10 Annex D (informative) Corrosion resistance of sherardized layers ..12 Bibliography. ..13 iii nSee=ZHEJIANG INST OF STANDARDIZATION C1 5956617 thout license from IHS