The inhibitive effects of 8-mercaptoquinoline and its iron chelate complex in the acid corrosion of iron in 1 M HCl

• V. P. Grigor´ev, E. V. Plekhanova, E. E. Verbitskaya and L. D. Popov

Southern Federal University, ul. Zorge 7, Rostov-on-Don, 344090 Russian Federation

Abstract: The inhibitive effect of a 8-hydroxyquinoline derivative (1) and the corresponding Fe²⁺ chelate (2) in the corrosion of Fe in 1 M HCl was studied. The adsorption mechanism of these compounds was considered and the post-treatment effect of these compounds was studied. An increase in the concentration of compounds 1 and 2 increases corrosion inhibition for all the compounds studied. The residual protective effect of chelates is much higher than that of the corresponding ligands. The results that we obtained were interpreted in terms of organic compounds – metal surface interactions.

Keywords: corrosion, inhibitor, iron, chelates, residual protective effect

Int. J. Corros. Scale Inhib., 2014, 3, no. 4, 215–226 PDF (868 K)
doi: 10.17675/2305-6894-2014-3-4-215-226

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