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POTENTIOSTATIC CURRENT OSCILLATIONS OF IRON IN H_2SO_4 SOLUTION UNDER THE INFLUENCE OF Cl~- AND MAGNETIC FIELDS |
WANG Chao LEI Sheng-bin CHEN Shen-hao YU Xi-ling (Department of Chemistry; Shandong University; Jinan; 250100) |
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Abstract The effects of Cl- and external magnetic fields on potentiostatic current oscillations in Fe/0.5mol·L-1 H2SO4 system were studied with electrochemical methods and holographic microphotography. The imposed magnetic field influenced the current oscillations by speeding up the mass transfer and leading to the increase in the ratio of activation time to passivation time (ta/tp). The addition of Cl- inhibited the growth of the passive film, resulting in the increase in the ta/tp, and positive shifting and narrowing down of the oscillation potential range. The existence of both the magnetic field and C- had concurrent influence on current oscillations, which might be brought about chiefly by the increase in the magnetic susceptibility of the substance formed at the iron/solution interface.
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Received: 25 February 1998
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Cite this article:
WANG Chao LEI Sheng-bin CHEN Shen-hao YU Xi-ling (Department of Chemistry; Shandong University; Jinan; 250100). POTENTIOSTATIC CURRENT OSCILLATIONS OF IRON IN H_2SO_4 SOLUTION UNDER THE INFLUENCE OF Cl~- AND MAGNETIC FIELDS. J Chin Soc Corr Pro, 1998, 18(1): 27-34.
URL:
https://www.jcscp.org/EN/ OR https://www.jcscp.org/EN/Y1998/V18/I1/27
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