Study on Corrosion Inhibition and Adsorption Behavior of Calcium Lignosulfonate on Pure Copper Grounding Material in Korla Soil Simulated Solution

• Published in: Cai liao bao hu Vol. 57; no. 2; pp. 84 - 91
• Main Author: HE Cheng, WANG Zongjiang, LIU Yongqiang, LIU Guangming, HE Hualin, YANG Haitao
• Format: Journal Article
• Language: Chinese
• Published: Editorial Department of Materials Protection 01.02.2024
• Subjects: korla soil simulation solution|pure cu grounding material|calcium lignosulfonate|corrosion inhibition|adsorption
• ISSN: 1001-1560
• DOI: 10.16577/j.issn.1001-1560.2024.0037

In order to investigate the corrosion inhibition efficiency of calcium lignosulfonate (CLS) added to the Korla soil simulation solution on pure copper grounding material and its adsorption behavior on the surface of pure copper grounding material， the effect of CLS in the Korla soil simulation solution on the corrosion behavior of pure copper grounding material was studied using potentiodynamic polarization curves and electrochemical impedance spectroscopy.Results showed that as the concentration of CLS increased within the range of 2.27×10-4 to 9.08×10-4 mol/L， the corrosion inhibition efficiency of Cu was found to gradually increase.This increase suggested that the addition of CLS effectively inhibited the corrosion reaction process of Cu， categorizing CLS in the soil simulation solution system as an anode corrosion inhibitor.Analysis of the Mott-Schottky curves revealed that the film formed on the Cu surface in the soil simulating solution possessed the characteristics of a P-type semiconductor film.It was