玉米叶提取物在酸性介质中抑制铝腐蚀特性的响应面方法和实验评估

IF 2.3 4区材料科学 Q2 METALLURGY & METALLURGICAL ENGINEERING

Anti-corrosion Methods and Materials Pub Date : 2024-06-06 DOI:10.1108/acmm-03-2024-2988

Justin C Emereole, Chigoziri N Njoku, Alexander I Ikeuba, Ifenyinwa C Ekeke, Emmanuel Yakubu, Ogbonna C Nkuzinna, Nnamdi A Nnodum, Madueke S Nwakaudu

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引用次数: 0

摘要

设计/方法/途径将响应面方法（RSM）与实验相结合，评估玉米叶提取物（CLE）在酸性介质中对铝的缓蚀性能。研究结果缓蚀效果随抑制剂浓度和时间的增加而增加，但随温度的升高而降低。缓蚀机理表明腐蚀过程是自发放热的物理吸附。热力学参数显示，活化能在 32.1 和 24.7 kJ/mol 之间，吸附能在 -14.53 和 -65.07 之间，吉布斯自由能为 -10.12 kJ/mol，这表明 CLE 是自发物理吸附放热的。利用 RSM 生成了一个模型来估计工艺参数（抑制剂浓度、反应时间和温度）的影响。还利用 RSM 对工艺因素进行了优化。实验得出的抑制效率百分比（85.61%）与理论技术（RSM）得出的 84.89% 非常接近。对被抑制和未被抑制的铝样品进行的扫描电镜观察表明，CLE 是酸性介质中一种有效的铝缓蚀剂。

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Response surface methodology and experimental evaluation of the inhibitory properties of corn leaf extract for aluminum corrosion in acid media

Purpose

This study aims to develop eco-friendly corrosion inhibitors for aluminum in acidic media by evaluating the corrosion inhibition properties of corn leaf extract (CLE) using response surface methodology (RSM) and experiments.

Design/methodology/approach

The RSM was combined with experiments to evaluate the corrosion inhibition properties of CLE on aluminum in acid media.

Findings

The effectiveness of the inhibition increased with increasing inhibitor concentration and time but decreased with increasing temperature. The corrosion inhibition mechanism revealed the corrosion process is spontaneous exothermic physical adsorption. Thermodynamic parameters revealed an activation energy between 32.1 and 24.7 kJ/mol, energy of adsorption between −14.53 and −65.07 and Gibbs free energy of −10.12 kJ/mol which indicated the CLE exothermically spontaneously physisorbed. A model was generated to estimate the effect of the process parameters (inhibitor concentration, reaction time and temperature) using the RSM. Optimization of the process factors was also carried out using the RSM. The percentage inhibition efficiency obtained experimentally (85.61%) was closely comparable to 84.89% obtained by the theoretical technique (RSM). The SEM observations of the inhibited and uninhibited Al samples demonstrated that CLE is an effective corrosion inhibitor for aluminum in acid media.

Originality/value

Results herein provide novel information on the possible application of CLEs as effective eco-friendly corrosion inhibitors.

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来源期刊

Anti-corrosion Methods and Materials 工程技术-冶金工程

CiteScore

2.80

自引率

16.70%

发文量

审稿时长

13.5 months

期刊介绍： Anti-Corrosion Methods and Materials publishes a broad coverage of the materials and techniques employed in corrosion prevention. Coverage is essentially of a practical nature and designed to be of material benefit to those working in the field. Proven applications are covered together with company news and new product information. Anti-Corrosion Methods and Materials now also includes research articles that reflect the most interesting and strategically important research and development activities from around the world. Every year, industry pays a massive and rising cost for its corrosion problems. Research and development into new materials, processes and initiatives to combat this loss is increasing, and new findings are constantly coming to light which can help to beat corrosion problems throughout industry. This journal uniquely focuses on these exciting developments to make essential reading for anyone aiming to regain profits lost through corrosion difficulties. • New methods, materials and software • New developments in research and industry • Stainless steels • Protection of structural steelwork • Industry update, conference news, dates and events • Environmental issues • Health & safety, including EC regulations • Corrosion monitoring and plant health assessment • The latest equipment and processes • Corrosion cost and corrosion risk management.