Fenugreek extract was examined as a corrosion inhibitor for copper and nickel in 2.0 M H2SO4solution by gravimetric and electrochemical measurements. Scanning electron micrographs showedthat the surface damage is decreased in inhibited acidic solution for both metals. The maximuminhibition efficiencies were 85.6% and 83.5% for copper and nickel, respectively, by using 20%(V/V%) of fenugreek extract in H2SO4 solution. Adsorption of fenugreek on both metals followsLangmuir adsorption isotherm. Florry-Huggins isotherm can be applied successively only in case ofnickel suggesting a chemisorptions mode at later stages of adsorption process. Linear polarization andimpedance measurements prove the inhibition ability of fenugreek for copper and nickel corrosion inH2SO4 solution.
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机译：胡芦巴提取物通过重量分析和电化学测量作为2.0 M H2SO4溶液中铜和镍的缓蚀剂。扫描电子显微镜照片表明，两种金属在受抑制的酸性溶液中表面损伤均减少。在H2SO4溶液中使用20％（V / V％）的葫芦巴提取物，对铜和镍的最大抑制效率分别为85.6％和83.5％。胡芦巴在两种金属上的吸附遵循朗缪尔吸附等温线。仅在镍提示在吸附过程的后期出现化学吸附模式的情况下，才能连续应用Florry-Huggins等温线。线性极化和阻抗测量证明葫芦巴具有抑制H2SO4溶液中铜和镍腐蚀的能力。
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