Inhibitive action and synergistic performance of 2-amino-ethanol and N,N-diethylethanamine on copper in hydrochloric acid solution
Bulletin of the Chemical Society of Ethiopia
Faculty of Engineering and the Built Environment, Tshwane University of Technology, P.M.B. X680, Pretoria, South Africa; College of Science and Technology, School of Engineering and Technology, Covenant University, P.M.B, Ota, Ogun State, Nigeria
The corrosion inhibition action of copper alloy in 1 M HC1 solution in the presence of 2-aminoethanol (A) and N,N-diethylethanamine (D) at 298 °K was investigated using gravimetric and linear polarization method. Surface studies of the copper alloy sample were observed by the help of high resolution scanning electron microscope equipped with energy dispersive spectroscopy (SEM/EDS). The evaluations were taken after 48 h interval for 288 h while the concentration of the inhibitor was varied from 5 to 10% w/v. The result of the examination shows that 2-aminoethanol (A) and A/A-diethylethanamine (D) has a good corrosion inhibition effect for copper alloy in 1 M HC1 solutions and its efficiency attains above 96% at 10% w/v concentration. The linear polarization result affirmed that 2-aminoethanol (A) and AA-diethylethanamine (D) acts as a mixed type corrosion inhibitor. Their adsorption on copper alloy has been found to obey Langmuir adsorption isotherm at all the concentration of inhibitor applied. The outcomes from all approaches are in good agreement with each other. © 2014 Chemical Society of Ethiopia.
National Research Foundation