IFKhAN-140, a chamber corrosion inhibitor for brass

• D.S. Kuznetsov, O.A. Goncharova, N.N. Andreev, N.P. Andreeva and S.S. Vesely

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

Abstract: A combination of accelerated electrochemical (potentiodynamic and impedance) and corrosion methods (performed under intense condensation of moisture and neutral salt fog), as well as outdoor tests were used to study the protective aftereffect of adsorption films formed on brass on exposure to a mixture of octadecylamine and benzotriazole (IFKhAN-140) at 100 and 120℃. It was shown that the components of IFKhAN-140 synergistically enhance the protective aftereffect of the adsorption layers. The protective aftereffect of the adsorbed inhibitor films is most pronounced at a chamber treatment temperature of 120℃, although at 100℃ the corrosion inhibition factors are also high. The protective properties of the inhibitor at the chamber treatment temperatures studied increase symbiotically with the treatment duration. However, chamber treatment for more than one hour leads to undesirable metal tarnishing. Using the ellipsometry method, it was found that the thickness of the surface films on brass that provides a significant increase in its corrosion resistance does not exceed 20 nm. The high protective properties of IFKhAN-140 toward steel, copper and brass at once allow it to be regarded as a formulation suitable for the protection of polymetallic products.

Keywords: brass, atmospheric corrosion, corrosion inhibitors, chamber corrosion inhibitors, vapor-phase protection, chamber protection

Int. J. Corros. Scale Inhib., 2020, 9, no. 1, 300-312 PDF (694 K)
doi: 10.17675/2305-6894-2020-9-1-19

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