摘要
采用动电位极化和恒电位极化等方法,研究了磁场对铁在0.2 mol/L氯化钠溶液中阳极溶解速率的影响.结果表明:磁场加速了铁的阳极溶解速率;在0 T磁场下动电位极化后,铁电极表面宏观均匀;在0.4 T磁场下动电位极化后,铁电极表面与磁场方向平行的两侧出现局部加速溶解;恒电位极化时,外加磁场下铁-电极溶液界面达到稳态所需的时间比无外加磁场下所需的长;在0 T和0.4 T磁场下恒电位极化时,在较宽的电位范围内磁场对阳极电流的增强系数相近.
The effect of magenetic field on anodic dissolution rate of iron in 0.2 mol/L sodium chloride solution was investigated by potentiodynamic polarization and potentiostatic polarization.The results showed that magnetic field accelerated the anodic dissolution rate of iron.The surface of electrode was macrsocopically uniform after potentiodynamic polarization in 0 T magnetic field.After potentiodynamic polarization in 0.4 T magnetic field,locally accelerated dissolution occurred on both sides of the iron electrode surface parallel to the direction of magnetic field.It took longer time for iron-electrode solution interface to reach the steady state in an applied magnetic field than that during anodic polarization in no applied magnetic field during potentiodynamic polarization.When potentiostatic polarization in 0 T and 0.4 T magnetic fields,the enhancement factor for anodic current density by the magnetic field was similar in a wide potential range.
作者
李晨
许鑫和
宋晓娟
宁飞
董海英
蔡爽巍
唐元杰
吕战鹏
LI Chen;XU Xinhe;SONG Xiaojuan;NING Fei;DONG Haiying;CAI Shuangwei;TANG Yuanjie;LÜ Zhanpeng(Institute of Materials,School of Materials Science and Engineering,Shanghai University,Shanghai 200072,China;State Key Laboratory of Advanced Special Steel,Shanghai University,Shanghai 200072,China)
出处
《腐蚀与防护》
CAS
北大核心
2022年第6期58-61,96,共5页
Corrosion & Protection
基金
国家自然科学基金项目(51571183)
国家重点研发计划(2017YFB0703002)。
关键词
磁场
铁
阳极溶解
氯化钠
腐蚀
magnetic field
iron
anodic dissolution
sodium chloride
corrosion
作者简介
通信作者:吕战鹏(1967-),研究员,博士,主要从事金属腐蚀与防护研究,021-56336107,zplu@t.shu.edu.cn。
