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

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 extractio...

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Bibliographic Details
Published in:Colloids and surfaces. A, Physicochemical and engineering aspects Physicochemical and engineering aspects, 2025-01, Vol.705, p.135710, Article 135710
Main Authors: Tan, Bochuan, Ren, Haiqin, Zhang, Ruilai, Wang, Rong, Ma, Lingwei, Li, Xin, Li, Wenpo, Guo, Lei, Al-Sadoon, Mohammad K.
Format: Article
Language:English
Subjects:
Benincasa hispida leaves extracts
Copper
Corrosion inhibitor
Electrochemical measurement
Theoretical method
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Summary: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 H2SO4. 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. [Display omitted] •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.
ISSN:0927-7757
DOI:10.1016/j.colsurfa.2024.135710