Corrosion behavior of platinum treated Type 304L stainless steels during simulated BWR startup conditions
Low HWC combined with noble metal chemical addition(NMCA)or Online NobleChemTM(OLNC)has been adopted for boiling water reactors(BWRs)to mitigate stress corrosion cracking(SCC)by lowering the electrochemical corrosion potential(ECP)of structural materials in BWRs.Noble metal was injected into feedwater and then deposited on inner surface of the stainless steel(SS)piping to catalyze the recombination of hydrogen with oxygen and hydrogen peroxide.When the ECP was decreased to a critical potential(-230 mVSHE),the initiation of SCC and the crack growth rate were obviously reduced.However,some research indicated that the ECP of SS with NMCA application was increased,even higher than that without NMCA when the materials were exposed to oxidizing environments without hydrogen injection during startup of BWRs.Additionally,a higher ECP might increase the exchange current density and be detrimental to the resistance of SCC.In this study,the SCC initiation behavior of 304L SS with NMCA application was investigated in oxidizing environment with different temperature to simulate BWR water environments during startup.The results revealed that the NMCA certainly induced more crack initiation site in oxidizing conditions.
BWR Noble Metal Chemical Addition On-Line Noble Metal Chemical Addition Stress Corrosion Cracking Slow Strain Rate Test
Yue-Tai Chen Mei-Ya Wang Tsung-Kuang Yeh
Institute of Nuclear Engineering and Science,National Tsing Hua University Nuclear Science and Technology Development Center,National Tsing Hua University Department of Engineering and System Science,National Tsing Hua University
国际会议
沈阳
英文
238-251
2017-09-26（万方平台首次上网日期，不代表论文的发表时间）