摘要
对含氟离子（Ｆ－）稀盐酸介质中 ３１６不锈钢的钝化行为进行了研究．结果表明，自然腐蚀电位下 ３１６不锈钢在含 Ｆ－稀盐酸溶液中能够钝化；低浓度 Ｆ－对不锈钢钝化性能的影响很小，但较高浓度的 Ｆ－（≥０.０１ｍｏｌ／Ｌ）能够显著降低钝化性能；阳极极化过程中不锈钢表面能形成含 Ｆ－的富 Ｃｒ钝化膜．提出了Ｆ－离子破坏钝化膜的加速反应机理．
The passivity of 316 stainless steel was investigated in F-containing dilute hydrochloric acid solutions aerated with oxygen gas at 25 degreesC. The polarization curves illustrate that 316 stainless steel can passivate in above solutions at corrosion potential. The anodic polarization curves show that low concentrations of F- ion have no significant influence on the passivity of 316 stainless steel, while the passivity is deteriorated by the higher concentrations (greater than or equal to0.01 mol/L) of F- ion. In 0.1 mol/L NaF solutions, an anodic current peak occurs before pitting potential, which doesn't appear in the solutions with low concentrations of NaF. During anodic polarization, a F--incorporated and Cr-enriched film forms on the stainless steel surface. The F--accelerated reactions mechanism is proposed for the deterioration of the passive film.
出处
《金属学报》
SCIE
EI
CAS
CSCD
北大核心
2001年第10期1083-1086,共4页
Acta Metallurgica Sinica
基金
国家重点基础研究专项经费G2000026409
