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首页> 外文会议>NACE Corrosion Conference Expo >Inhibition of Mild Steel Corrosion Using Aqueous Extract of Cocos nucifera L. Peduncle in Acidic Solutions and Their Adsorption Characteristics
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Inhibition of Mild Steel Corrosion Using Aqueous Extract of Cocos nucifera L. Peduncle in Acidic Solutions and Their Adsorption Characteristics

机译：抑制酸性溶液中的Cocos Nucififera L.花梗的水提取物和吸附特性的抑制作用及其吸附特性

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摘要

Cocos nucifera L. peduncle (CNP) extract, obtained from destructive distillation, as a possible source of green inhibitor, for the corrosion of mild steel in 1 M HCl was evaluated using mass loss method, potentiodynamic polarization technique, and electrochemical impedance spectroscopy (EIS). The inhibition efficiency was found to change with variation in concentration of the inhibitor, time of immersion, and temperature. The adsorption of the inhibitor molecule onto the metal surface was found to obey El-Awady kinetic thermodynamic and Frumkin adsorption isotherm. The activation energy (E_a) and other thermodynamic parameters indicate a strong interaction between the inhibitor and the mild steel surface. Polarization measurements indicate that CNP act as a mixed type inhibitor. SEM confirmed the adsorption of inhibitor molecules on mild steel surface. Quantum chemical calculations were performed by Gaussian 03 code of programs using B3LYP/6-31 G (d) basis set, to gain some insight, about structural and electronic effects on the inhibition efficiency of the tested inhibitor. FT-IR spectral studies further corroborated the mechanism of inhibition.
机译：椰子L.花梗（CNP）提取物，从干馏获得，如绿色抑制剂的可能的源，低碳钢中的1M HCl的腐蚀是用质量损失法，电位极化技术，以及电化学阻抗谱（EIS评价）。抑制效率为与在抑制剂浓度变化，浸渍的时间和温度来改变。抑制剂分子在金属表面上的吸附被认为服从埃尔 - Awady动力学热力学和弗兰坎吸附等温线。活化能（E_A）和其它热力学参数表明抑制剂和软钢表面之间的强相互作用。极化测量表明，CNP充当混合型抑制剂。 SEM证实在软钢上表面抑制剂分子的吸附。量子化学计算通过使用B3LYP / 6-31 G（d）基组，从而获得一些见解，关于所测试的抑制剂的抑制效率的结构和电子效果程序高斯03代码执行。 FT-IR光谱的研究进一步证实了抑制的机制。

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