Inhibition of copper local depassivation in alkaline media with oxygen-containing anions

• E.A. Skrypnikova¹ and S.A. Kaluzhina²

¹ MESC Air Force Military Air Academy named after N.E. Zhukovsky and Yu.A. Gagarin, ul. Staryh bolshevikov 54a, Voronezh, 394000 Russian Federation
² Voronezh State University, Universitetskaya pl. 1, Voronezh, 394006 Russian Federation

Abstract: Using complex physical and chemical methods, a comparative estimation of the capability of benzotriazole (BTAH) to act as an inhibitor of copper local activation (LA) was carried out in alkaline–nitrate and alkaline–sulphate solutions in a temperature range of 20–60°C. It was shown that in both systems studied, BTAH hinders copper LA according to an adsorption–polymerization mechanism. Furthermore, the effect is the stronger, the higher the temperature of the working solution is.

Keywords: copper, pitting corrosion, elevated temperature, benzotriazole

Int. J. Corros. Scale Inhib., 2017, 6, no. 2, 142–150 PDF (1 534 K)
doi: 10.17675/2305-6894-2017-6-2-4

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