Effect of inhibitor formulations based on octanoic acid with benzotriazole and 2-mercaptobenzothiazole on the corrosion and electrochemical properties of AlSi10Mg alloy obtained using additive technologies

• A.R. Gazizyanova, I.V. Fedotova, S.M. Reshetnikov, R.S. Konshin, T.A. Pisareva, S.A. Emel’yanova and L.A. Sabanova

Udmurt State University, 1 Universitetskaya St., 426034 Izhevsk, Russia

Abstract: The effect of inhibitor formulations based on octanoic acid with benzotriazole and 2-mercaptobenzothiazole on the corrosion and electrochemical properties of AlSi10Mg aluminum alloy obtained by selective laser melting at different build rates was studied. Microstructural, corrosion-electrochemical, and IR spectroscopic studies were carried out. It was shown that the pore size depends on the scan speed. The minimum average pore diameter was observed for the sample fabricated at 1400 mm/s. It was found that in most cases, inhibitor treatment leads to a decrease in the current in the passive region. IR spectroscopy revealed changes in the spectral pattern after the thermochemical activation of the inhibitor formulations, which may indicate that their components interact with the surface of the AlSi10Mg alloy.

Keywords: corrosion, additive technologies, selective laser melting, AlSi10Mg, spectroscopic methods of analysis, benzotriazole, 2,2-mercaptobenzothiazole

Int. J. Corros. Scale Inhib., 2026, 15, no. 2, 113-127
doi: 10.17675/2305-6894-2026-15-2-7

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