ISO INTERNATIONAL STANDARD 9223 Second edition 2012-02-01 Corrosion of metals and alloys Corrosivity of atmospheres - Classification, determination and estimation Corrosion des métaux et alliages - ( Corrosivité des atmospheres - Classification, détermination et estimation Reference number ISO 9223:2012(E) @ ISO 2012 by IHS under lic Not for Resale ISO 9223:2012(E) COPYRIGHTPROTECTEDDOCUMENT @ISO2012 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, IsO's memberbody in the country of the requester. ISO copyright office Case postale 56 : CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail [email protected] Web www.iso.org Published in Switzerland ........ @ ISO 2012 - All rights reserved Not for Resale ISO 9223:2012(E) Contents Page Foreword .iv Introductior 1 Scope 2 Normative references. 3 Terms and definitions 4 Symbols and abbreviated terms 4.1 Symbols.... 4.2 Abbreviated terms 5 Category of corrosivity of the atmosphere... 6 Classification of corrosivity of the atmosphere... Corrosivity determination based on corrosion rate measurement of standard specimens ... 8 Corrosivity estimation based on environmental information ... 8.1 Corrosivityestimation .General ..... 8.2 Normative corrosivity estimation based on calculated first-year corrosion losses .. 8.3 Informative corrosivity estimation based on description of exposure conditions ... Annex A (informative) Sources of uncertainty associated with the determination and estimation of atmospheric corrosivity..... Annex B (informative) Characterization of the atmosphere in relation to its corrosivity Annex C (informative) Description of typical atmospheric environments related to the estimation of corrosivity categories.... Bibliography..... CopyrghtInternational OrganizaionSadardizaoghtsreserved ili nse from IHS Not for Resale