The influence of synergistic effects of 5-methyl-1H-benzotriazole and potassium sorbate as well as 5-methyl-1H-benzotriazole and gelatin on the copper corrosion in sulphuric acid solution

The synergistic inhibition effect of the 5-methyl-1H-benzotriazole (MBTAH)/1H-benzotriazole (BTAH) with potassium sorbate and gelatin on the copper corrosion in an acidic sulphate solution was investigated by electrochemical methods and weight loss measurements. According to the obtained results, potassium sorbate and gelatin act as mixed-type inhibitors. The inhibition efficiency was significantly greater in the presence of MBTAH/BTAH with potassium sorbate or gelatin which indicates that synergistic inhibition effect was achieved. Investigated compounds obey Langmuir adsorption isotherm.