Ethylhexanoic acid as a chamber inhibitor of zinc-plated steel

• A.Yu. Luchkin, O.S. Makarova, S.S. Vesely, O.A. Goncharova and N.N. Andreev

A.N. Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninsky pr. 31, 119071 Moscow, Russian Federation

Abstract: It has been shown by corrosion and electrochemical methods that chamber treatment of zinc-plated steel with 2-ethylhexanoic acid significantly increases its corrosion resistance due to passivation of the coating and a growth of its resistance against local anionic depassivation. The optimal conditions for chamber treatment of zinc-plated steel are as follows: temperature 100°C, duration 1 h. The anticorrosive after-effect of the adsorption films of 2-ethylhexanoic acid increases on one-day exposure of zinc-plated steel to ambient conditions after chamber treatment. The protective action of 2-ethylhexanoic acid as a chamber corrosion inhibitor has a mixed activation-blocking mechanism, with predominance of blocking effects.

Keywords: zinc-plated steel, atmospheric corrosion, chamber corrosion protection, chamber inhibitors, ethylhexanoic acid

Int. J. Corros. Scale Inhib., 2023, 12, no. 2, 586-596
doi: 10.17675/2305-6894-2023-12-2-11

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