Analysis of natural okra extracts as corrosion inhibitors for mild steel in acidic medium

被引:0
作者
Aliyu Adebayo Sulaimon
Pearl Isabellah Murungi
Bennet Nii Tackie-Otoo
Princess Christiana Nwankwo
Mohamad Azmi Bustam
机构
[1] Universiti Teknologi PETRONAS,Department of Petroleum Engineering
[2] Universiti Teknologi PETRONAS,Centre of Research in Ionic Liquids (CORIL)
[3] University of Ibadan,Department of Petroleum Engineering
[4] Universiti Teknologi PETRONAS,Department of Chemical Engineering
来源
Environmental Science and Pollution Research | 2023年 / 30卷
关键词
Corrosion inhibitors; Okra mucilage; Box-Behnken; Mild steel; Weight loss method;
D O I
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中图分类号
学科分类号
摘要
Plant extracts have been shown to effectively inhibit metal corrosion. Using the Box-Behnken design, gravimetric, and electrochemical techniques, analyses were designed to investigate the anti-corrosion potential of okra in a 1M HCl medium. The inhibition performances derived from the various methods were in good agreement, demonstrating that physio-chemisorption was effective and adhered to the Langmuir isotherm model. The efficiency of okra mucilage extract was 96% at a much lower concentration compared to 91.2% and 88.4% for the unsieved extract and gelly-okra filtrate, respectively. FTIR results showed the presence of several functional groups in the okra mucilage extract that are associated with adsorption, and TGA analysis revealed that the extract has high thermal stability. FESEM analysis also supported evidence of adsorption. It was determined that corrosion inhibition by okra mucilage extract was primarily influenced by temperature, followed by extract concentration, with immersion time having the least effect. From the model optimization, it was observed that okra mucilage extract at 200 ppm, 60°C, and 24 h gave an inhibition efficiency of 89.98% and high desirability. These results demonstrate the high capacity of natural okra as an efficient biodegradable corrosion inhibitor.
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页码:119309 / 119328
页数:19
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