Author(s)

Lihua Liang, Changjiang Zuo, Xin Shi

Corresponding Author

Lihua Liang

Abstract

The inhibitory performance and adsorption behavior of green inhibitor Polyaspartic acid (PASP) on copper in 3% NaCl solution was studied by electrochemical impedance and polarization curve method. The results showed that when PASP was used at an optimal concentration of 15 mg/L, the corrosion inhibition rate could reach 77.2%. The adsorption of PASP significantly reduced the erosion of Cl-, which belongs to the anode type corrosion inhibitor. The adsorption behavior of PASP obeys the Langmuir adsorption isotherm. The formula is a spontaneous, exothermic process that belongs to chemical adsorption.

Keywords

Copper, Sea water, PASP, adsorption and corrosion