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Passivity and pitting of austenic stainless steel AISI 316 in the CH3OH-H2SO4 system

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Abstract

The passivity and pitting behaviour of AISI 316 stainless steel in methanol containing different concentrations (0.001 to 1 M) of H2SO4 has been investigated by an electrochemical method. Higher concentrations of sulphuric acid have been found to facilitate the passivation process and influence the passivity current and passivation range. The studies reveal the peculiarities of steel pitting and predicts the protective properties of the surface by a process of repassivation in this system. The kinetics of pitting, morphology of the pits and repassivation of the surface have been investigated for this steel. The beneficial effect of molybdenum as an alloying element of steel, on corrosion behaviour has been noticed.

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Author notes

  1. V. K. Singh

    Present address: Department of Chemistry, U.P. College, Varanasi, India

Authors and Affiliations

  1. Department of Chemistry, Banaras Hindu University, 221 005, Varanasi, India

    V. K. Singh & V. B. Singh

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  2. V. B. Singh
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Singh, V.K., Singh, V.B. Passivity and pitting of austenic stainless steel AISI 316 in the CH3OH-H2SO4 system. J Mater Sci 25, 690–696 (1990). https://doi.org/10.1007/BF00714096

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