Study on Corrosion Inhibition and Adsorption of Polyaspartic Acid Corrosion Inhibitor to Seawater Copper
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DOI: 10.25236/iwmecs.2019.048
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