Evaluation of the effects of oxide film on electrochemical corrosion potential of stainless steel in high temperature water

Shunsuke Uchida, Tomonori Satoh, Takashi Tsukada, Takahiro Miyazawa, Yoshiyuki Satoh, Keizo Ishii

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Citations (Scopus)

Abstract

As a result of in situ measurements of corrosion behaviors of stainless steel specimens exposed to H2O2 and O2 in high temperature water, the relationship among electrochemical corrosion potential (ECP), metal surface conditions and environmental conditions have been revealed. Based on the relationship, a model to evaluate ECP of stainless steel has been developed with coupling an electrochemical model and a double oxide layer model and then differences in ECP behaviors of specimens exposed to H 2O2 and O2 have been evaluated. Major conclusions are as follows. 1. ECP was determined by the inner oxide layers, which were much affected by OH radicals at the surface. The difference in ECP behaviors of the specimens exposed to H2O2 and O 2 were mainly from the thickness and developing rate of the inner oxide layers. 2. Calculated ECP behaviors, e.g., the different responses to H2O2 and O2 and hysteresis and memory effects, agreed with the measured ones. 3. Further studies were required for fine structures of oxide layers and chemical and physical properties of oxides to improve the accuracy of the model.

Original languageEnglish
Title of host publication14th International Conference on Environmental Degradation of Materials in Nuclear Power Systems Water Reactors 2009
Pages1100-1109
Number of pages10
Publication statusPublished - 2009 Dec 1
Event714th International Conference on Environmental Degradation of Materials in Nuclear Power Systems Water Reactors 2009 - Virginia Beach, VA, United States
Duration: 2009 Aug 232009 Aug 27

Publication series

Name14th International Conference on Environmental Degradation of Materials in Nuclear Power Systems Water Reactors 2009
Volume2

Other

Other714th International Conference on Environmental Degradation of Materials in Nuclear Power Systems Water Reactors 2009
CountryUnited States
CityVirginia Beach, VA
Period09/8/2309/8/27

ASJC Scopus subject areas

  • Nuclear Energy and Engineering
  • Environmental Engineering

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