摘要
采用交流阻抗技术研究了钝化304不锈钢在pH8.4,H_3BO_3(0.2Mol/t-Na_2B_4O_7(0.05mol/1)及pH9.2,Na_2B4O_7(0.05moI/I)的含氯介质中的点蚀行为;提出了点蚀的反应机理及发展阶段的界面等效电路模型,并认为在点蚀的发生和发展阶段都可能有复合物(MOHCl)及其进一步的吸附产物(MOHCl-Cl_n^-)形成。
The pitting behavior of passive 304 stainless steel in pH8.4, H3BO3 (0.2mol/l)-Na2B4O7 (0.05mol/l) and pH9.2, Na2B4O7 (0.05mol/l) solutions containing chlorion has been investigated using impedance technique. The possible reaction mechanism as well as the corresponding equivalent circuit model is presented. It is proposed that an intermediate complex (MOHCl) and its further adsorbed product (MOHCl-Cln-)ads will form during pit initiation and propagation stages.
出处
《北京科技大学学报》
EI
CAS
CSCD
北大核心
1990年第2期142-147,共6页
Journal of University of Science and Technology Beijing
关键词
点蚀
钝化
不锈钢
含氯介质
pitting, passivation, stainless steel, solution containing chlorion
