ISO INTERNATIONAL STANDARD 14713-3 Second edition 2017-04 Zinc coatings Guidelines and recommendations for the protection against corrosion of iron and steel in structures - Part 3: Sherardizing Revetements de zinc Lignes directrices et recommandations pour la protection contre la corrosion du fer et de I'acier dans les constructions- Partie 3: Sherardisation Reference number ISO 14713-3:2017(E) ISO IS02017 IS0 14713-3:2017(E) COPYRIGHTPROTECTEDDOCUMENT IS02017,PublishedinSwitzerland 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 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 ii @ IS0 2017 - All rights reserved IS0 14713-3:2017(E) Contents Page Foreword iv Introduction .V 1 Scope. .1 2 Normative references .1 3 Terms and definitions 1 4 Design for sherardizing. 2 4.1 General 2 4.2 Surface preparation 2 4.3 Design considerations 3 4.4 Clearances of threaded components 3 5 Storage and transport 4 5.1 General. 4 5.2 Recommendations for storage and transport 6 Effects of article condition on quality of sherardizing .4 6.1 Composition 4 6.2 Surface condition 4 6.3 Influence of steel surface roughness on the sherardized coating thickness 5 6.4 Internalstressesinthebasematerial 5 6.4.1 General. 5 6.4.2 Distortion cracking 5 6.4.3 Hydrogen embrittlement 6 6.5 Large objects and thick steels. 6 7 Effect of sherardizing process on the article 6 7.1 Processing circumstances 6 7.2 Coating properties influenced by the sherardizing process. 6 7.2.1 Sherardizing practice .6 7.2.2 Surface properties of the finished article 6 8 After-treatments .7 Bibliography 8 IS02017-All rights reserved iii