Effects of a variety of water chemistry conditions on the corrosion behavior of Type 304 stainless steel (SS) in a simulated boiling water reactor (BWR) environment are described. In particular, the effects of dissolved oxygen (O2), hydrogen (H2), and hydrogen peroxide (H2O2), and various impurities on the electrochemical corrosion potential (ECP) and oxide structure of 304 SS are considered. It has been shown that the presence of H2O2, water flow rate, and corrosion rate and oxide chemistry of 304 SS significantly affected the 304 SS ECP and also observed that the presence of Cu in the water increased the 304 SS ECP in HWC, but no significant of Zn effect was observed. It is also interesting to note that in the presence of both H2O2 and H2, Pt ECP is lower than 304 SS ECP, mainly due to possible catalytic nature of Pt and/or low chemical potential of OH radicals.

Subject
Water, Boiling water reactors, Hydrogen concentration, Corrosion currents, Corrosion rate, Metal surfaces, Hydrogen peroxide, Water chemistry, Oxide surfaces, Oxygen, Copper, Risk reduction, Hydrogen
Keywords:
BWR, stainless steel, high temperature water, ECP, stress corrosion cracking, oxygen, peroxide
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2005
Association for Materials Protection and Performance (AMPP)
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