Triazoles as a class of multifunctional corrosion inhibitors. Review. Part II. 1,2,3-Benzotriazole and its derivatives. Iron and steels

• Yu.I. Kuznetsov

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

Abstract: This article presents a review of studies (mainly published in 2005–2019) on the adsorption of 1,2,3-benzotriazole (BTA) and its derivatives on iron and various steels from aqueous solutions, as well as their ability to inhibit corrosion in a wide range of solution pH. It examines the effect of these organic corrosion inhibitors on the formation of surface layers, their composition and efficiency of protective action studied using corrosion, electrochemical and other physicochemical methods. Considerable attention is paid to BTA itself, the wide range of corrosive environments in which it can serve as an effective corrosion inhibitor, analysis of the reasons for its successful application in the practice of anticorrosion protection of various steels, as well as the new prospects for its use and increasing the efficiency of anticorrosion protection. The significant advantages of BTA and some of its derivatives for the protection of iron and steel in combination with other organic corrosion inhibitors mainly belonging to the class of carboxylic acid salts are analyzed. A brief discussion is given concerning the prospects of creating nanocontainers with BTA that can significantly increase the protective properties and environmental safety of paint and other coatings on steels. The importance of continuing research in this relatively new and important scientific field is noted. At the same time, it is noted that the prospects of steel protection with mixed inhibitors containing BTA or its substituted derivatives are poorly studied in alkaline and acidic environments, in contrast to neutral ones.

Keywords: metal corrosion, adsorption, corrosion inhibitors, 1,2,3-benzotriazole and its derivatives, iron, mild steel, carboxylic acid salts, acid solutions, concrete pore solutions, encapsulated inhibitor

Int. J. Corros. Scale Inhib., 2020, 9, no. 3, 780-811 PDF (647 K)
doi: 10.17675/2305-6894-2020-9-3-1

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