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

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.

Inhibitive effect of 1,3,4-thiadiazole-2,5-dithiol on copper corrosion in chloride media

“…The latter is ensured in several chemical conditions and atmospheric environment by forming corrosion products with non conductive behavior or a barrier layer of oxides [9,10]. However, corrosion of copper is much more accelerated in some chemical specific environment especially those containing O 2 , sulfate, chloride and nitrates ions which are known as aggressive anions towards copper [11][12][13][14][15][16][17][18].…”