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Received September 23, 2003
Accepted April 19, 2004
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An Electrochemical Study of Stainless Steels and a Nickel Alloy in a Decontamination Agent Using the Potentiodynamic Method
Research Institute for Innovation in Sustainable Chemistry (AIST), National Institute of Advanced Industrial Science and Technology, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8565, Japan 1Nuclear Power Laboratory, Korea Electric Power Research Institute (KEPRI), 103-16 Munji-Dong, Yuseong-Gu, Daejeon 305-380, Korea 2Gwangju Branch, Korea Basic Science Institute (KBSI), 300 Yongbong-Dong, Buk-Gu, Gwangju 500-757, Korea
hj-lee@aist.go.jp
Korean Journal of Chemical Engineering, July 2004, 21(4), 895-900(6), 10.1007/BF02705536
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Abstract
Chemical decontamination is accepted as one of the effective methods for decreasing radioactivity from radioactive materials existing in the systems of the nuclear power plants. In chemical decontamination processes, metal oxides dissolve in chelating agents such as oxalic acid and EDTA (Ethylenediaminetetraacetic acid) in the dissolution step for the chemical decontamination process. It is important to investigate corrosion behaviors with respect to decontaminating agents in the development of decontamination process. In this study, the potentiodynamic method was considered among electrochemical methods in order to investigate corrosion behaviors of stainless steels (SS 316, SS 304) and a nickel alloy (Inconel 600). The corrosion behaviors observed in the potentiodynamic results agreed with those of corrosion behaviors observed in the weight loss method, showing that the electrochemical study is a very useful method for estimating corrosion behavior.
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