摘要
利用动电位极化曲线、电化学阻抗谱和恒电位极化电流响应曲线对一种高氮不锈钢在含不同浓度Cl^-的0.5mol/L NaOH溶液中的腐蚀行为进行了研究。结果表明:高氮不锈钢在含Cl^-的0.5mol/L NaOH中具有良好的耐蚀性,极化曲线表现出阳极钝化特征,Cl^-浓度对点蚀电位无显著影响,钝化电流密度随Cl^-浓度的增加而增大;当Cl^-浓度增加到1.00mol/L时,高氮不锈钢表面生成的钝化膜呈n型半导体,仍具有良好的保护性,钝化膜的载流子密度随着Cl^-浓度的增加而增大。
The electrochemical behavior of a high nitrogen stainless steel（HNSS）in 0.5mol/L NaOH solution with different NaCl concentrations was investigated by means of potentiodynamic polarization curves,electrochemical impendence spectrum,current-time transient and Mott-Schottky curves.The results show that the HNSS had good corrosion resistance,and the potentiodynamic polarization curves of the HNSS exhibited anodic passivation in 0.5mol/L NaOH solution containing Cl^-.The concentration of Cl^- had no remarkable effects on pitting potential.The passive current density of the HNSS increased with the increase of Cl^- concentration.The passive film formed on the surface of the HNSS exhibited n type semiconductor and still had good protection,when the Cl^- concentration increased to 1.00mol/L.The donar density of passive film increased with the increasing of Cl^-concentration.
作者
李树伟
章莎
方金祥
乔岩欣
LI Shuwei ZHANG Sha FANG Jinxiang QIAO Yanxin(Daqing Oilfield Engineering Co. , Ltd. , Daqing 163712, China J iangxi Province Key Laboratory of Polymer Preparation and Processing, Shangrao Normal University, Shangrao 334001, China School of Mechanical Engineering, Guizhou University, Guiyang 550025, China School of Materials Science and Technology, Jiangsu University of Science and Technology, Zhenjiang 212003, China)
出处
《腐蚀与防护》
北大核心
2017年第8期583-588,共6页
Corrosion & Protection
基金
国家自然科学基金(51401092)
关键词
腐蚀
电化学
高氮钢
钝化
corrosion
electrochemistry
high nitrogen stainless steel（HNSS）
passivation
