Inhibition of copper corrosion using thiazole derivative

Abstract

The inhibitor efficiency of 5-(4'-dimetylaminobenzylidene)-2,4-dioxotetrahydro-1,3-thiazole, DABDT, against copper corrosion in acidic sulfate solution (0.1moldm-3 Na2SO4 at pH=3) was investigated applying the electrochemical impedance spectroscopy (EIS) and scanning electron microscopy (SEM). Obtained results indicated that inhibition efficiency of investigated thiazole derivative is good and that it increases with the increase of the applied concentration of thiazole. The protective effect the DABDT achieved through the adsorption (following Langmuir isotherm) on copper surface as a thin inhibitor film, which is manifested as an increase of the total resistance, a decrease of the double layer capacitance and also as the less damaged copper surface compared with the blank solution.