ISO INTERNATIONAL 22848 STANDARD First edition 2021-02 Corrosion of metals and alloys Test method for measuring the stress corrosion crack growth rate of steels and alloys under static-load conditions in high-temperature water Corrosion des metaux et des alliages-Méthode d'essai pour le mesurage de la vitesse de propagation des fissures de corrosion sous contrainte des aciers et des alliages dans des conditions de charge statiquedansdeI'eauahautetempérature Referencenumber IS0 22848:2021(E) ISO @ IS0 2021 IS0 22848:2021(E) COPYRIGHTPROTECTEDDOCUMENT IS02021 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 below or Iso's member body in the country of the requester. ISO copyright office CP 40i: Ch. de Blandonnet 8 CH-1214 Vernier, Geneva Phone: +41 22 749 01 11 Email: [email protected] Website: www.iso.org Published in Switzerland i IS0 2021-All rights reserved IS022848:2021(E) Contents Page Foreword ..iv 1 Scope ..1 2 Normative references ..1 3 Terms and definitions ..1 4 Principle of test .2 5 Specimen .3 5.1 Specimen orientation. .3 5.2 Specimengeometry .3 5.3 .4 Specimen finish. 5.4 Specimen size requirement. .4 5.5 Specimendimensionalmeasurement ..5 5.6 Stress intensityfactor,Ki 6 Testequipment. .5 7 Cracklengthmeasurementbypotentialdropmethod .6 8 Corrosionpotentialmeasurement .7 8.1 General. .7 8.2 Measurement method .7 Test procedure. 9 .7 .1 9.1 General 9.2 Installationinautoclave 8 9.3 Adjustment of test environment .9 9.4 Loading. .9 9.4.1 General. .9 9.4.2 Fatigue pre-cracking. 9 9.4.3 SCC transitioning 9.4.4 Static loading .11 10 Evaluationoftestresults. ..11 11 Testreport .14 AnnexA(informative)cDCB specimengeometryand stress intensityfactorcalculation .16 AnnexB(informative)EquipmentforSCCgrowthtesting .19 AnnexC (informative)WaterchemistryandmonitoringitemsinsimulatedBWRandPWR .22 environments AnnexD (informative)Approachtodeterminecrackgrowthrate ..24 Bibliography .25 @ IS0 2021 - All rights reserved iii