摘要
采用动电位极化曲线和电化学阻抗谱研究了316LN不锈钢在不同pH和不同Cl^-浓度的硼酸+氢氧化锂混合溶液中的电化学行为。结果表明,316LN在上述混合溶液中均能形成钝化膜,且都具有较宽的钝化区间;随着pH增大,316LN的点蚀电位升高,维钝电流密度减小,电荷转移电阻增大;随着Cl^-含量增大,316LN的点蚀电位下降,维钝电流密度增大,电荷转移电阻减小。
The electrochemical behaviors of 316LN stainless steel in H3 BOa-t-LiOH solution with different pH and Cl- contents were studied by potentiodynamic polarization and electrochemical impedance spectroscopy （EIS）. The results show that 316LN stainless steel had a wide passive anodic region in all solutions with different pH and Cl- contents. With the increase of pH, the pitting potential increased, the passivation current decreased and the charge transfer resistance increased of 316LN stainless steel. With the increase of Cl- content, the pitting potential decreased, the passivation current increased and the charge transfer resistance decreased of the stainless steel.
出处
《腐蚀与防护》
CAS
北大核心
2015年第11期1053-1057,共5页
Corrosion & Protection
基金
国家高技术研究发展计划(2012AA03A507)
江西省教育厅科技项目(GJJ14534)
江西省金属材料微结构调控重点实验室开放基金(JW201223001)
江苏高校优势学科建设工程资助项目(PDPA)
关键词
316LN不锈钢
极化曲线
电化学阻抗
316LN stainless steel
potentiodynamic polarization
electrochemical impedance spectroscopy
