核电厂水池覆面钢板在硼酸溶液中的腐蚀行为  

Corrosion Behavior of Steel Liner Plate in Boric Acid Solution Used in Nuclear Power Plant

作　　者：姚琳 郑越 张洪军 胡月飞 崔岚 左景辉[2] YAO Lin;ZHENG Yue;ZHANG Hongjun;HU Yudei;CUI Lan;ZUO Jinghui(China Nuclear Power Engineering Co., Ltd., Beijing 100840, China;Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China)

机构地区：[1]中国核电工程有限公司,北京100840 [2]中国科学院金属研究所,沈阳110016

出　　处：《腐蚀与防护》2018年第7期525-529,共5页Corrosion & Protection

摘　　要：采用晶间腐蚀试验,电化学试验及应力腐蚀试验等研究了核电厂水池覆面钢板S32205、S32101和S30403在硼酸溶液中的腐蚀行为。结果表明:三种材料在给定试验条件下的晶间腐蚀倾向很小;S32205不锈钢的缝隙腐蚀发生电位和保护电位最高,分别为0.64V和0.1V;S32101和S30403不锈钢的缝隙腐蚀发生电位基本接近,约为0.25V,S30403不锈钢的保护电位(0V)略高于S32101不锈钢(-0.1V)的;三种材料的耐缝隙腐蚀和应力腐蚀性能均为S32205不锈钢>S32101不锈钢>S30403不锈钢;三种材料经恒载荷应力腐蚀试验后均未发生断裂。Intergranular corrosion test, electrochemical test and stress corrosion test were used to study the corrosion behavior of pool steel liner S32205, S32101 and S30403 in the boric acid solution of nuclear power plants. The results showed that the intergranular corrosion tendency of the three materials under given test conditions was small. Crevice corrosion potential and protection potential of S32205 stainless steel were the highest, which were 0. 64 V （vs. SCE, the same below） and 0. 1 V, respectively. The crevice corrosion potentials of S32101 and S30403 stainless steels were almost the same, about 0. 25 V. The protection potential of S30403 stainless steel （0 V） was slightly higher than that of $32101 stainless steel （--0. 1 V）. The crevice corrosion resistance and stress corrosion resistance of the three materials were S32205 stainless steel 〉S32101 stainless steel 〉S30403 stainless steel, and all the three materials did not fracture after the constant load stress corrosion test.

关 键 词：水池覆面钢板 硼酸 缝隙腐蚀 应力腐蚀 

分 类 号：TG174[金属学及工艺—金属表面处理]