Chamber inhibitors of steel corrosion based on lauric acid

• I.V. Tsvetkova^1,2, A.Yu. Luchkin¹, O.A. Goncharova¹, S.S. Veselyi¹ and N.N. Andreev¹

¹ A.N. Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninsky pr. 31, 119071 Moscow, Russian Federation
² D. Mendeleev University of Chemical Technology of Russia, Miusskaya sq. 9, 125047 Moscow, Russian Federation

Abstract: Chamber protection is a kind of vapor-phase protection of metals from atmospheric corrosion by means of corrosion inhibitors. It involves short-term treatment of metals in inhibitor vapors at elevated temperatures and is based on the anticorrosive aftereffect of the adsorption films formed in this process. The use of chamber inhibitors is a promising approach to the in-process steel protection. The ability of lauric acid, its binary mixtures with urotropine, as well as ternary mixtures with urotropine and benzotriazole, tolyltriazole or chlorobenzotriazole to protect steel in chamber protection was studied by a combination of electrochemical and corrosion methods. It has been shown that lauric acid itself is an efficient chamber inhibitor of atmospheric corrosion. Its protective effect can be enhanced by addition of urotropine or combinations of urotropine with benzotriazole or its derivatives. The protective effect of the mixed chamber inhibitors that we studied significantly exceeds that of their components. Nevertheless, analysis of the mutual effect of the components indicates that they do not manifest synergistic interactions.

Keywords: atmospheric corrosion, chamber inhibitors, lauric acid, vapor-phase protection of steel

Int. J. Corros. Scale Inhib., 2021, 10, no. 1, 107-119 PDF (578 K)
doi: 10.17675/2305-6894-2021-10-1-6

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