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A novel corrosion inhibitor for copper in sulfuric acid media: Complexation of iodide ions with Benincasa Hispida leaf extract

Bochuan TanSchool of Metallurgy and Materials Engineering, Chongqing University of Science and Technology, Chongqing, 401331, ChinaHaiqin RenSchool of Metallurgy and Materials Engineering, Chongqing University of Science and Technology, Chongqing, 401331, ChinaRuilai ZhangChongqing Academy of Metrology and Quality Inspection, Chongqing, 401331, ChinaRong WangSchool of Metallurgy and Materials Engineering, Chongqing University of Science and Technology, Chongqing, 401331, ChinaLingwei MaNational Materials Corrosion and Protection Data Center, University of Science and Technology Beijing, Beijing 100083, ChinaXin LiSchool of Chemistry and Chemical Engineering, Chongqing University, Chongqing, 400044, ChinaWenpo LiSchool of Chemistry and Chemical Engineering, Chongqing University, Chongqing, 400044, ChinaLei GuoSchool of Material and Chemical Engineering, Tongren University, Tongren 554300, ChinaMohammad K. Al‐SadoonDepartment of Chemistry, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia

2024en

ABI

Annotatsiya

In the context of green and low-carbon development, the rapid development of industry brings the problem of metal corrosion costs increase, metal corrosion protection methods are of great concern. Extracts from Benincasa hispida leaves (BHLE), which were obtained through pressurised liquid extraction , were employed as a inhibitor for copper corrosion in 0.5 M H 2 SO 4 . Their composition and anti-corrosion properties were subsequently analyzed and evaluated. The electrochemical analysis results indicated that BHLE functions as a cathodic-type corrosion inhibitor . The anti-corrosion performance intensifies with the increase in concentration but diminishes gradually as the temperature rises, when the concentration of BHLE is 400 mg/L, the corrosion inhibition efficiency can reach 91.82 %, when the concentration of added potassium iodide reaches 16 mg/L the slow-release efficiency of the compounded corrosion inhibitor reaches 96.92 %. The addition of I − strengthens the inhibition efficiency through the adsorption form dominated by competitive adsorption. The adsorption of BHLE onto the surface of copper follows the Langmuir monolayer adsorption model. • Electrochemical test data indicate Benincasa hispida leaves extract belong to mixed-type corrosion inhibitor. • The Pumpkin leaf extract adsorb on the Cu in accordance with the Langmuir model. • Theoretical calculation provide in-depth understanding of the experimental results.

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Identifikatorlar

DOI: 10.1016/j.colsurfa.2024.135710

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