Corrosion Inhibition of Al-alloy in 3.5% NaCl Solution by a Natural Inhibitor: An Electrochemical and Surface Study

Wanying Liu; Ambrish Singh; Yuanhua Lin; Eno. E. Ebenso; Guan Tianhan; Chengqiang Ren

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Corrosion Inhibition of Al-alloy in 3.5% NaCl Solution by a Natural Inhibitor: An Electrochemical and Surface Study

机译：天然抑制剂对铝合金在3.5％NaCl溶液中的腐蚀抑制作用：电化学和表面研究

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Root extract of Coptis chinensis (CCR) was used and its inhibition efficiency on corrosion of Al alloyin 3.5 wt.% NaCl was investigated through surface morphology and electrochemical techniques. TheNyquist diagrams containing the extract with different concentrations showed increase in Rct values,thus increasing inhibition efficiency. Potentiodynamic curves suggested that the extract acted as mixedtype in nature. The surface analysis through scanning electrochemical microscopy (SECM), UV- Visible Spectroscopy for Al alloy specimens also proved the results obtained by the electrochemicalexperiments. The adsorption of the studied inhibitor obeyed the Temkin adsorption isotherm.

机译：使用黄连的根提取物，通过表面形貌和电化学技术研究了其对3.5 wt％NaCl铝合金腐蚀的抑制作用。含有不同浓度提取物的奈奎斯特图显示Rct值增加，因此抑制效率增加。电位动力学曲线表明提取物在自然界中具有混合型的作用。通过扫描电化学显微镜（SECM），紫外可见光谱对铝合金样品进行表面分析也证明了电化学实验获得的结果。研究的抑制剂的吸附遵循Temkin吸附等温线。

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《International Journal of Electrochemical Science》 |2014年第10期|共14页
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Wanying Liu; Ambrish Singh; Yuanhua Lin; Eno. E. Ebenso; Guan Tianhan; Chengqiang Ren;
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Corrosion Inhibition of Al-alloy in 3.5% NaCl Solution by a Natural Inhibitor: An Electrochemical and Surface Study

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