核蒸汽发生器用缓蚀剂的电化学行为研究  

Research of Electrochemistry Behavior of Slower for Nuclear Steam Generator

作　　者：徐祺[1] 黄新泉[1] 苏兴万[1] 马韦刚[1] 

机构地区：[1]中国核动力研究设计院核燃料及材料国家级重点实验室,成都600041

出　　处：《核动力工程》2005年第1期84-87,共4页Nuclear Power Engineering

摘　　要：近来的研究表明,添加TiO2缓蚀剂能有效减缓蒸汽发生器传热管的应力腐蚀开裂(SCC)和晶间腐蚀(IGA)等局部腐蚀,延长蒸汽发生器的使用寿命。本研究以不锈钢为试验材料,对含Ti缓蚀添加剂在热浓碱环境中缓解应力腐蚀开裂的能力进行了初步的电化学研究。结果表明,在热浓碱环境中,含Ti缓蚀剂对不锈钢碱蚀有一定缓蚀效果,而不同浓度的缓蚀剂的缓蚀效果差别不明显。Corrosion of construction material in high temperature water is one of the important problems of nuclear reactor. Lately research shows that TiO2 inhibiting species can alleviate local corrosion, such as stress corrosion cracking (SCC) and intergranular attack (IGA) of steam generator tubes, and thus prolong the life of SG tube. This paper has studied the corrosion potentials and polarization curve of stainless steel in caustic solution with TiO2 inhibiting species, and it shows that TiO2 have positive effect.

关 键 词：核蒸汽发生器 不锈钢 含Ti缓蚀剂 碱溶液 极化曲线 

分 类 号：TG174.4[金属学及工艺—金属表面处理]