Longan seed and peel as environmentally friendly corrosion inhibitor for mild steel in acid solution: Experimental and theoretical studies

The extract of Longan’s peel and seed inhibits the corrosion of mild steel by adsorbing the effective compounds on the steel surface, resulting in the increased impedance values in Nyquist curves. [Display omitted] Longan seed and peel were extracted and used for impeding the corrosion of mild steel...

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Bibliographic Details
Published in:Journal of colloid and interface science 2017-08, Vol.499, p.110-119
Main Authors: Liao, Liu Li, Mo, Shi, Luo, Hong Qun, Li, Nian Bing
Format: Article
Language:English
Subjects:
Eco-friendly inhibitor
Electrochemical measurements
Longan
Mild steel
Modeling studies
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Summary:The extract of Longan’s peel and seed inhibits the corrosion of mild steel by adsorbing the effective compounds on the steel surface, resulting in the increased impedance values in Nyquist curves. [Display omitted] Longan seed and peel were extracted and used for impeding the corrosion of mild steel in hydrochloric acid solution. Experimental analyses indicate that the water extract of Longan’s seed and peel, a mixed type inhibitor, can be chemically adsorbed onto the steel surface, and its inhibition effect rises with increasing extract concentration. To understand the adsorption mechanism and the contributions of the four main compounds of the extract to corrosion protection effect, quantum chemical methods and infrared spectrum were also employed. Theoretically, four main antioxidant compounds were regarded as effective components in the water extract of Longan’s seed and peel.
ISSN:0021-9797
1095-7103
DOI:10.1016/j.jcis.2017.03.091