磁场对车轴钢在氯化钠溶液中腐蚀速率及阳极过程的影响  

The Effects of Magnetic Field on Corrosion Rate and Anodic Processes of Axel Steel in Sodium Chloride Solution

作　　者：宋晓娟 李鑫 王娟[1,2] 董海英 吕战鹏[1,2] SONG Xiaojuan;LI Xing;WANG Juan;DONG Haiying;LYU 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)

机构地区：[1]上海大学材料科学与工程学院材料研究所,上海200072 [2]上海大学省部共建特殊钢冶金与制备国家重点实验室,上海200072

出　　处：《腐蚀与防护》2024年第7期1-7,共7页Corrosion & Protection

基　　金：国家自然科学基金(52271060);国家重点研发计划(2017YFB0703002)。

摘　　要：在自然充气的氯化钠溶液中研究了磁场对车轴钢腐蚀速率和阳极溶解的影响。结果表明:磁场对较短浸泡周期内的腐蚀有显著加速作用,当浸泡时间较长时,磁场的影响减弱。磁场倾向于使自腐蚀电位正移,导致阳极极化曲线起始段的电流密度降低。在阳极极化曲线的电流密度-电位线性区间恒电位极化时,当极化电位较低时,极化一段时间后,电流密度能够达到稳态,而当极化电位较高时,极化开始后电流密度先急增;然后基本随时间延长线性下降。外加磁场后,阳极电流密度出现一个小增幅,表明在本试验的极化条件下,试样的反应速率主要不是受带电离子离开电极表面的传质过程控制的。研究结果可以为磁场作用下金属材料的腐蚀行为评价和机理分析提供依据。The effect of magnetic field on the corrosion rate and anodic dissolution of axle steel in a naturally inflated sodium chloride solution was studied.The results indicate that the magnetic field had a significant accelerating effect on corrosion within a shorter soaking period,and the influence of the magnetic field weakened when the soaking time prolonged.The magnetic field tended to cause a positive shift in the self corrosion potential,resulting in a decrease in the current density at the beginning of the anodic polarization curve.When performing constant potential polarization in the linear range of current density-potential in the anodic polarization curve,when the polarization potential was low,the current density could reach a steady state after polarization for a period of time.However,when the polarization potential was high,the current density first increased sharply after polarization began and then decreased linearly with time.After applying a magnetic field,there was a small increase in the anode current density,indicating that under the polarization conditions of this experiment,the reaction rate of the sample was mainly not controlled by the mass transfer process of charged ions leaving the electrode surface.The research results could provide a basis for the evaluation and mechanism analysis of the corrosion behavior of metal materials under magnetic field action.

关 键 词：磁场 车轴钢 氯离子 腐蚀 阳极溶解 

分 类 号：TG174.4[金属学及工艺—金属表面处理]