Rubber leaf extract: A green inhibitor for mild steel corrosion in 1.0 M HCl medium, response surface analyzer and electrochemical approach

Results in Surfaces and Interfaces Pub Date : 2025-07-23 DOI:10.1016/j.rsurfi.2025.100607

O.G. Echem , V.I. Chukwuike , T. Tubonemi , V.C. Anadebe , F.E. Abeng , L.G. Barine

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Abstract

Strong adsorption is a requisite surface property for long time protection of inhibitors. The present research investigates the potential of the anchoring sites and water expelling characteristics of rubber leave extract on mild steel for corrosion protection in HCl environment. Using rubber leave promises to be advantageous not only because of its abundance but also environmentally friendly. Based on this, atomic absorption spectroscopy (AAS), gasometric, weight loss, electrochemical and surface imaging techniques were employed to investigate the efficiency of the inhibitor extract. Three isotherm models were utilized to explain the adsorption characteristic of the inhibitor. The results showed comparatively high inhibition efficiencies from the techniques as follows; weight loss (96.98 %), AAS (99.68 %), electrochemical (96.52 %) and gasometric (86.53 %). The minor deviation in the case of the gasometric method was attributed to errors relating to unavoidable gas leakage. The overall protection efficiency can be linked to the material adhesion and high electrical resistance (48000 Ω) of rubber extract. The scanning electron microscopy (SEM) shows a surface morphology of the adsorbent molecules on the mild steel surface according to Langmuir and Temkin adsorption isotherms.

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橡胶叶提取物：在1.0 M HCl介质中对低碳钢的绿色缓蚀剂，响应面分析和电化学方法

强吸附是缓蚀剂长期保护所必需的表面性能。研究了橡胶叶提取物在低碳钢上的锚固点潜力及其在盐酸环境下的排水特性。使用橡胶假不仅是有利的，因为它的丰富，而且是环保的。在此基础上，采用原子吸收光谱（AAS）、气相色谱、失重、电化学和表面成像等技术考察了缓蚀剂提取物的萃取效率。采用三个等温线模型来解释缓蚀剂的吸附特性。实验结果表明，采用以下几种技术抑制效果较好；失重（96.98%）、原子吸收光谱（99.68%）、电化学（96.52%）和气相测定（86.53%）。气体计量法的微小偏差归因于与不可避免的气体泄漏有关的误差。整体保护效率与橡胶提取物的材料附着力和高电阻（48000 Ω）有关。扫描电镜（SEM）根据Langmuir和Temkin吸附等温线显示了吸附剂分子在低碳钢表面的表面形貌。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Results in Surfaces and Interfaces

CiteScore

2.70

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0.00%

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