M. A. Chidiebere, L. Nnanna, A. Blessing, K. Oguzie, Okolue Beluonwu, Onyeachu Benedict, Emeka Emanuel Oguzie
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引用次数: 14
摘要
采用失重法、电化学法和表面探针法研究了龙葵叶水提液在1 M HCl和0.5 M H2SO4中的抑菌效果。DR萃取物通过在金属/溶液界面上吸附萃取物的有机物来抑制低碳钢在两种酸性环境中的腐蚀。动电位极化结果表明DR在两种酸性环境下均为混合型缓蚀剂，阻抗结果显示DR在腐蚀钢表面有吸附作用。抑制率的增加是浓度依赖性的。吸附遵循Langmuir等温线。扫描电镜(SEM)结果显示，在酸溶液中，在低碳钢表面吸附形成了一层保护层。
Inhibition of Acid Corrosion of Mild Steel Using Delonix regia Leaves Extract
The inhibition efficacy of aqueous extracts of the leaves of Delonixregia (DR) in 1 M HCl and 0.5 M H2SO4 have been investigated using weight loss, electrochemical and surface probe techniques. DR extract inhibited mild steel corrosion in both acidic environments via adsorption of the extract organic matter on the metal/solution interface. Potentiodynamic polarization results indicate that DR is a mixed type inhibitor in both acidic environments, whereas the impedance results revealed adsorption of the DR species on a corroding steel surface. Increase in inhibition efficiency was concentration dependent. The adsorption followed Langmuir adsorption isotherm. Scanning electron microscopy (SEM) results revealed the formation of a protective layer adsorbed on a mild steel surface in the acid solutions.
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