Abstract
Effect of thermal aging and irradiation on the corrosion behavior of 308L stainless steel (SS) in simulated pressurized water reactor (PWR) environment was investigated by using electrochemical techniques and surface analysis. The results delineated that the corrosion susceptibility of 308L SS decreased first and then increased obviously after the thermal-aged, thermal-aged and irradiated process, respectively. It can be attribute to variation of the microstructure and composition of the passive film. Compared with the 308L SS, the thermal-aged ones performed a compacter passive film characteristic with oxide Cr2O3, Fe2O3 and hydroxide Ni(OH)3. Whereas, after the thermal-aged and irradiated process, the thickness of the passive film decreased obviously and the hydroxide Ni(OH)3 transform to the unstable NiOOH. As a result, performing higher corrosion susceptibility once more.
Published Version
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