磁场对铁在不同电位高氯酸钠溶液中阳极溶解的影响
Effect of Magnetic Field on Anodic Dissolution of Iron in Sodium Perchlorate Solution at Different Potentials
摘 要
在不同磁场条件的0.1 mol/L NaClO4溶液中对铁阳极进行了动电位极化和恒电位极化，研究了磁场对铁阳极溶解的影响。结果表明：磁场使铁的开路电位正移，降低了极化曲线低电位区的电流密度，增大了高电位区的电流密度和阳极极化曲线线性段的斜率；恒电位极化时，低电位下磁场的作用与施加磁场的顺序有关，在高电位下磁场会增大电流密度，与动电位极化曲线的结果一致；磁场作用下高速溶解后铁电极表面出现月牙形局部腐蚀形貌。
磁场
阳极溶解
高氯酸钠
局部腐蚀
iron
magnetic field
anodic dissolution
sodium perchlorate
localized corrosion
Abstract
Potentiodynamic polarization and potentiostatic polarization were carried out to anode of iron in 0.1 mol/L NaClO4 solution and different magnetic fields, in order to study the effect of magnetic field on the anodic dissolution. The results show that magnetic field shifted the open circuit potential (OCP) of iron in positive direction, decreased the current density in the low potential region of the polarization curves, and increased the current density in the high potential region and the slope of linear section in anodic polarization curves. The effect of magnetic field was related to the sequence of applying magnetic field at low potentials in potentiostatic polarization, and magnetic field could increase the current density at high potentials, which was consistent with the result of potentiodynamic polarization curves. Localized corrosion morphology with cresent-shape was observed on the surface of electrodes after high-rate dissolution in the action of magnetic field.
中图分类号 TG172 DOI 10.11973/fsyfh-202008001
所属栏目 试验研究
基金项目 国家自然科学基金（51571183）；国家重点研发计划（2017YFB0703002）
收稿日期 2019/9/25
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引用该论文: CAI Shuangwei,NING Fei,TANG Yuanjie,ZHANG Kun,CUI Tongming,MA Jiarong,Lü Zhanpeng. Effect of Magnetic Field on Anodic Dissolution of Iron in Sodium Perchlorate Solution at Different Potentials[J]. Corrosion & Protection, 2020, 41(8): 1
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参考文献
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【3】MONZON L M A,COEY J. Magnetic fields in electrochemistry:The Lorentz force. A mini-review[J]. Electrochemistry Communications,2014,42(5):38-41.
【4】MONZON L M A,COEY J. Magnetic fields in electrochemistry:The Kelvin force. A mini-review[J]. Electrochemistry Communications,2014,42(5):42-45.
【5】LU Z P,HUANG D L,YANG WU,CONGLETON J. Effects of an applied magnetic field on the dissolution and passivation of iron in sulphuric acid[J]. Corrosion Science,2003,45(10):2233-2249.
【6】LU Z P,HUANG D L,YANG W. Probing into the effects of a magnetic field on the electrode processes of iron in sulphuric acid solutions with dichromate based on the fundamental electrochemistry kinetics[J]. Corrosion Science,2005,47(6):1472-1492.
【7】LU Z P,SHOJI T,YANG W. Anomalous surface morphology of iron generated after anodic dissolution under magnetic fields[J]. Corrosion Science,2010,52(8):2680-2686.
【8】LI H J,XIONG Q,LU Z P,et al. A magnetic field induced undulated surface and the shift of the active/passivation transition threshold of iron in a sulfuric acid solution[J]. Corrosion Science,2017,129:179-191.
【9】WANG C,CHEN S H,YU X L. Anodic dissolution of iron in a magnetic field with holographic microphotography[J]. Journal of Electrochemical Society,1996,143(12):283-285.
【10】SUEPTITZ R,KOZA J,UHLEMANN M,et al. Magnetic field effect on the anodic behaviour of a ferromagnetic electrode in acidic solutions[J]. Electrochimica Acta,2009,54(8):2229-2233.
【11】LU Z P,CHEN J M. Magnetic field effects on anodic polarisation behaviour of iron in neutral aqueous solutions[J]. British Corrosion Journal,2000,35(3):224-228.
【12】陈珍,吕战鹏,肖茜,等. 磁场对铁在含亚硝酸根的氯化钠溶液中不同电位下极化电流的影响[J]. 腐蚀与防护,2017,38(1):6-10.
【13】LU Z P,HUANG C,HUANG D L,et al. Effects of a magnetic field on the anodic dissolution,passivation and transpassivation behaviour of iron in weakly alkaline solutions with or without halides[J]. Corrosion Science,2006,48(10):3049-3077.
【14】陈俊明,吕战鹏. 磁场和杂质离子存在下Fe/Na2SO4体系的阳极极化行为[J]. 中国腐蚀与防护学报,1998,18(2):119-125.
【15】梁峰,曹楚南. 铁在含有SCN-的高氯酸钠及硫酸钠溶液中的腐蚀电化学行为[J]. 中国腐蚀与防护学报,1990,10(2):109-118.
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