Electrochemical and theoretical studies of adsorption and corrosion inhibition of aniline violet compound on carbon steel in acidic solution

Abstract

The inhibition ability of 4-[bis[4-(dimethylamino)phenyllmethyl]-N,N-dimethylaniline (Mv10B) on carbon steel in 1 M HCl solution was studied by electrochemical techniques. Mv10B inhibited carbon steel corrosion in 1 M HCl solution significantly and the inhibition efficiency increased with Mv10B concentration. Potentiodynamic polarization results showed that Mv10B was a mixed-type inhibitor. The adsorption of Mv10B on steel surface followed Langmuir adsorption isotherm. The inhibition performance of Mv10B was also evidenced by AFM images. Computational investigations of studied inhibitor are performed by using HF method with 6-31++G(d,p) and 6-311++G(d,p) basis sets. (C) 2015 Published by Elsevier B.V. on behalf of Taiwan Institute of Chemical Engineers.