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Effect of hydrogen sulfide on the iron dissolution rate in a sodium sulfate solution under natural aeration conditions

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Abstract

The influence of hydrogen sulfide (10–100 mg/1) on the Armco iron anodic dissolution in an aerated 0.17 M Na2SO4 solution is investigated. During a potentiostatic anodic polarization, the hydrogen sulfide introduction makes the current increase stepwise. The magnitude of the increase depends on the duration of preliminary anodic polarization, electrode potential, and hydrogen sulfide concentration. The anodic metal dissolution activation by hydrogen sulfide is explained by chemical conversion of the oxide-hydroxide passivating film into iron sulfide that is generated at the metal surface in the form of a porous film and does not hinder the electrode dissolution.

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Authors and Affiliations

  1. Moscow State Pedagogical University, ul. Malaya Pirogovskaya 1, 119882, Moscow, Russia

    V. V. Egorov & V. V. Batrakov

Authors
  1. V. V. Egorov
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  2. V. V. Batrakov
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Dedicated to the ninetieth anniversary of Ya.M. Kolotyrkin’s birth.

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Egorov, V.V., Batrakov, V.V. Effect of hydrogen sulfide on the iron dissolution rate in a sodium sulfate solution under natural aeration conditions. Russ J Electrochem 36, 1144–1148 (2000). https://doi.org/10.1007/BF02757536

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  • DOI: https://doi.org/10.1007/BF02757536

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