Electrochemical Mitigation of Intergranular Stress Corrosion Cracking in Boiling Water Reactors
Electrochemical Mitigation of Intergranular Stress Corrosion Cracking in Boiling Water Reactors
复制标题
沸水反应堆中晶间应力腐蚀裂纹的电化学缓解
DOI：
10.5006/1.3280658
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发表时间：
2005
期刊：
影响因子：
--
通讯作者：
Y. J. Kim
中科院分区：
文献类型：
--
作者：
Y. J. Kim
摘要介绍了电化学缓解沸水堆结构材料晶间应力腐蚀开裂（IGSCC）的基本认识和实际应用。控制表面的电化学性质，例如，催化或绝缘性质，改变结构材料的电化学腐蚀电位（ECP），并随后影响高温水中IGSCC的敏感性。显然，氧化物表面上贵金属的存在显著改善了氢氧化动力学，从而提高了氢（H2）到氧（O2）和过氧化氢（H2O2）形成水（H2O）的催化重组效率。当水中存在化学计量或更高量的氢时，掺杂有贵金属的304型（UNS S30400）不锈钢（SS）表面上的催化性质的增强导致化学上最低的ECP值。还观察到绝缘保护...
Abstract The fundamental understanding and practical application of electrochemical mitigation of intergranular stress corrosion cracking (IGSCC) of structural materials in a boiling water reactor (BWR) is described. Controlling the electrochemical property of the surface, e.g., catalytic or insulating nature, alters the electrochemical corrosion potential (ECP) of structural materials and subsequently affects the IGSCC susceptibility in high-temperature water. It is evident that the presence of noble metals on the oxide surface dramatically improves the hydrogen oxidation kinetics and thus enhances the catalytic recombination efficiency of hydrogen (H2) to oxygen (O2) and hydrogen peroxide (H2O2) to form water (H2O). The enhancement in the catalytic nature on Type 304 (UNS S30400) stainless steel (SS) surface doped with noble metals results in the thermodynamically lowest ECP value when a stoichiometric or higher amount of hydrogen is present in the water. It is also observed that an insulated protective...