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J Chin Soc Corr Pro  1991, Vol. 11 Issue (4): 393-402    DOI:
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EIS STUDY OF PITTING CORROSION OF PASSIVE 304 STAINLESS STEEL IN STRONG ACIDIC MEDIA CONTAINING CHLORIDE
Zhang Puqang Wu Jixun Zhang Wenqi Lu Xinying and Wang Kuang (University of Science and Technology; Beijing)
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Abstract  Pitting behavior of passive AISI 304 stainless steel in 0.25M Na_2SO_4 aqueous solutions of pH1.0 containing chloride has been investigated using electrochemical impedance spectra(EIS). The characteristics of the measured impedance spectra have been analyzed. The following conclusions have been obtained: (1) The inductance occurring in very low frequency range at pit propagation stage and the impedance characteristics at pit initiation stage can be well interpreted by the adsorption-transitional chloride containing complex model (2) Under the experiental conditions, the adsorption of SO_4~(2-) on the surface of pits is the controlling factor for pit propagation kinetics. (3) The variation of the reciprocal of the overall charge transfer resistance of pitting reflects the variation of the overall pitting current.
Received:  25 August 1991     
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Zhang Puqang Wu Jixun Zhang Wenqi Lu Xinying and Wang Kuang (University of Science and Technology; Beijing). EIS STUDY OF PITTING CORROSION OF PASSIVE 304 STAINLESS STEEL IN STRONG ACIDIC MEDIA CONTAINING CHLORIDE. J Chin Soc Corr Pro, 1991, 11(4): 393-402.

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https://www.jcscp.org/EN/     OR     https://www.jcscp.org/EN/Y1991/V11/I4/393

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