Abstract
The effects of magnetic field on anodic dissolution of iron in sulfuric acid were studied by potentiostatic polarization measurements and scanning electron microscopy observation. Magnetic field would reduce the surface film coverage fraction on electrode by enhancing the film dissolution process, thus made the electrode prone to active dissolution state. With increasing the applied potentials, magnetic field would accelerate the anodic dissolution, change the oscillation state or passive state to active dissolution state, or maintain the passive state, respectively. Potential for onset of passivation moved in the noble direction when magnetic field was imposed. At specific anodic potentials, denting occurred on two sides of the electrode paralleling to the gravitation direction due to localized accelerated dissolution induced by magnetic field. Uneven dissolution of iron in the presence of magnetic field was related to the relative configuration between magnetic field direction and the electrode surface , and the special concentration gradient at the electrode circumferential area.
Keywords
Iron, Magnetic field, Potentiostatically anodic polarization, Uneven dissolution, Passivation
Publication Date
2001-08-28
Online Available Date
2001-08-28
Revised Date
2001-08-28
Received Date
2001-08-28
Recommended Citation
Zhan-peng Lv, De-lun HUANG, Wu YANG.
Uneven Anodic Dissolution of Iron Induced by Magnetic Field[J]. Journal of Electrochemistry,
2001
,
7(3): 326-331.
DOI: 10.61558/2993-074X.1429
Available at:
https://jelectrochem.xmu.edu.cn/journal/vol7/iss3/5
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