Abstract
Passivation of iron and low-carbon steel in borate buffer solution (pH 7.40) was studied in the presence of 1,2,3-benzotriazole (BTA) and its equimolar mixture with sodium phenylundecanoate (SPU). As was shown BTA is an ineffective stabilizer of the passive state, while SPU has a better efficiency in this function. However, the stabilizing effect of BTA can be improved by forming its adsorption layer on the electrode surface pre-modified with SPU anions at anodic potential E = 0.2 V or by its co-adsorption with SPU. The analysis of attraction between the adsorbed particles of these inhibitors enabled to suggest that their co-adsorption on oxidized iron (E = 0.2 V) yields associates of SPU and BTA anions.
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Original Russian Text © Yu.I. Kuznetsov, N.P. Andreeva, M.O. Agafonkina, 2010, published in Elektrokhimiya, 2010, Vol. 46, No. 5, pp. 593–598.
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Kuznetsov, Y.I., Andreeva, N.P. & Agafonkina, M.O. On co-adsorption on passive iron from aqueous 1,2,3-benzotriazole and sodium phenylundecanoate. Russ J Electrochem 46, 560–564 (2010). https://doi.org/10.1134/S1023193510050101
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DOI: https://doi.org/10.1134/S1023193510050101