Anomalous surface morphology of iron generated after anodic dissolution under magnetic fields |
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Authors: | Zhanpeng Lu Tetsuo Shoji |
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Affiliation: | a Fracture and Reliability Research Institute, Faculty of Engineering, Tohoku University, Sendai 980-8579, Japan b Shanghai Research Institute of Materials, Shanghai 200437, China |
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Abstract: | The effects of applied magnetic fields on the anodic dissolution of iron in a sulfuric acid solution were studied by potentiodynamic polarization measurements and electrode morphology observations. Uneven anodic dissolution occurs in the presence of magnetic field and the extent of the electrode surface inhomogeneity increases with magnetic flux density. Severely local dissolution at two edge areas of the iron electrode in the presence of magnetic fields is caused by the inhomogeneous distribution of the magnetic flux density at the ferromagnetic iron electrode and the resultant enhancement of the mass transport rate of interfacial film at local areas. |
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Keywords: | A Iron C Corrosion C Magnetic field C Magnetohydrodynamics C Magnetic field gradient force |
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