Development of the Fundamental Multiphysics Analysis Model for Crevice Corrosion Using a Finite Element Method
It is necessary to study crevice structures which can mitigate crevice corrosion as the origin of SCC of materials used in BWR core region. A fundamental crevice corrosion simulation model has been developed to design corrosion control structures for these materials. Effects of the width and the depth on the corrosive environment in a crevice were studied based on that model. Calculated pH in the crevice decreased with time for all crevice geometries. The lowest pH was found at the deepest position in the crevice for all the cases. It seemed there was only a negligible difference in pH where the crevice depth was deeper than the specific depth which depended on the crevice width.
KeywordsBWR Crevice corrosion Stress corrosion cracking Control rod Electrochemical corrosion potential Stainless steel
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