Abstract
Studies on the iron passivation by organic acid anions in aqueous solutions are briefly reviewed. It is shown that the passivation can be caused only by their adsorption, retarding both the iron dissolution and the formation of oxide films. Earlier, it had been believed that oxide films play a dominant role in the iron passivation in neutral solutions. The recent viewpoint is that such nonoxide iron passivation can occur in solutions of salts of not only aromatic amino acids (sodium phenylantranilate and its substitutes), but other carboxylic acids as well. An important role of chemisorption and hydrophobic properties of anions for the formation of adsorption passive films is emphasized. New possibilities for inhibitor protection of iron against corrosion, which is based on adsorptive passivation, are pointed out.
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Translated from Elektrokhimiya, Vol. 40, No. 12, 2004, pp. 1503–1507.
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Kuznetsov, Y.I. Adsorptive Passivation of Iron by Organic Acid Anions. Russ J Electrochem 40, 1287–1291 (2004). https://doi.org/10.1007/s11175-005-0006-2
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DOI: https://doi.org/10.1007/s11175-005-0006-2