ISO INTERNATIONAL STANDARD 12944-2 Second edition 2017-11 Paints and varnishes Corrosion protection of steel structures by protective paint systems Part 2: Classification of environments Peintures et vernis - Anticorrosion des structures en acier par systemes de peinture - Partie 2: Classification des environnements Reference number ISO 12944-2:2017(E) [so @ IS0 2017 Provided by IHS Markit under license with ANS IS0 12944-2:2017(E) COPYRIGHTPROTECTEDDOCUMENT @ IS0 2017, Published in Switzerland All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form writtenpermission.PermissioncanberequestedfromeitherIsOattheaddressbeloworIsO'smemberbodyinthecountryof 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 [email protected] www.iso.org ii @ IS0 2017 - All rights reserved Provided by IHS Markit under iense with ANSI IS0 12944-2:2017(E) Contents Page Foreword iv Introduction 1 Scope 1 2 Normative references. 3 Terms and definitions 4 Corrosion stresses due to the atmosphere, water and soil 3 4.1 Atmosphericcorrosion 4.2 Corrosion in water and soil. 4.2.1 General.: 4.2.2 Structures immersed in water 4.2.3 Structures buried in soil. 4.3 Special cases. 5 Classification of environments. 5.1 Atmospheric-corrosivity categories 5.2 Categoriesforwaterandsoil Annex A (informative) Climatic conditions Annex B (informative) Special cases Bibliography 11 @ IS0 2017 - All rights reserved iii Provided by IHS Markit under license with ANSI