ISO INTERNATIONAL STANDARD 22479 First edition 2019-05 Corrosion of metals and alloys Sulfur dioxide test in a humid atmosphere (fixed gas method) Corrosion des metaux et alliages - Essai au dioxyde de soufre en atmosphere humide (méthode avec volume fixe de gaz) Reference number IS0 22479:2019(E) @ IS0 2019 IS0 22479:2019(E) COPYRIGHTPROTECTEDDOCUMENT @ IS0 2019 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 401 : Ch. de Blandonnet 8 CH-1214 Vernier, Geneva Phone: +41 22 749 01 11 Fax: +41 22 749 09 47 Email: [email protected] Website: www.iso.org Published in Switzerland ii @ IS0 2019 - All rights reserved IS0 22479:2019(E) Contents Page Foreword .iv Introduction V 1 Scope. 1 2 Normative references .1 3 Terms and definitions 1 4 Principle 1 5 Apparatus. 1 6 Test specimens. 3 6.1 General 3 6.2 Dimensions. 3 6.3 Preparation. 3 6.3.1 Metals and alloys 3 6.3.2 Paints and varnishes 3 6.4 Arrangement of the test specimens 4 Test conditions 4 7.1 Test cycles 4 7.2 Test duration. 5 8 Procedure 6 8.1 Introduction of water 6 8.2 Arrangementofthetestspecimens 6 8.3 Introduction of sulfur dioxide. 6 8.4 Heating the test cabinet. 6 8.5 Introduction of standard atmosphere 6 8.6 Replacement of water and sulfur dioxide 6 8.7 Cleaning of test specimens after test 6 8.7.1 General 6 8.7.2 Metals and alloys, metallic and non-organic coating test specimens .6 8.7.3 Organic coating test specimens. 7 8.8 Performance check 7 9 Evaluation .7 10 Test report. .7 Annex A (informative) Another example of a test cabinet .9 Annex B (informative) Performance check 10 Annex C (informative) Supplemental information 12 Bibliography .14 @ IS0 2019 - All rights reserved iii