2, 10-dimethylacridin-9(10H)-one as New Synthesized Corrosion Inhibitor for C38 Steel in 0.5 M H2SO4

Abstract

The corrosion inhibition of C38 steel in 0.5 M H2SO4 solution by 2,10-dimethylacridin-9(10H)-one (DMA) has been studied using electrochemical polarization , electrochemical impedance spectroscopy (EIS) and weight loss methods. The corrosion inhibition efficiency measured by all the three techniques was in good agreement with each other. The results showed that DMA is a very good inhibitor for C38 steel in acidic media. The inhibition efficiency increases with increasing inhibitor concentration and with increasing temperature. It acts as a mixed-type inhibitor. Thermodynamic and activation parameters obtained from the study are discussed. Adsorption of DMA was found to follow the Langmuir’s adsorption isotherm and chemisorption mechanism is proposed.