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首页> 外文期刊>Applied Surface Science >Electrochemical and quantum chemical studies of some Schiff bases on the corrosion of steel in H_2SO_4 solution
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Electrochemical and quantum chemical studies of some Schiff bases on the corrosion of steel in H_2SO_4 solution

机译：基于H_2SO_4溶液中钢腐蚀的一些席夫碱的电化学和量子化学研究

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摘要

The efficiency, as steel-corrosion inhibitors in 0.1 M and 1 M H_2SO_4, of two Schiff bases, 2-{ [(4-methoxyphenyl)imino]methyl}phenol and 1-{[(4-methoxyphenyl)imino]methyl}-2-naphthol, (abbreviated SB-1 and SB-2, respectively) was investigated by Tafel extrapolation and linear polarization methods. Corrosion parameters and adsorption isotherms were determined from current-potential curves. It was found that the percent inhibition efficiencies (η%) and surface coverage (θ) increase with an increases in the concentrations of inhibitors. The results showed that these compounds act as good corrosion inhibitors especially at high concentrations. The adsorption of used compounds on the steel surface obeys Langmuir's isotherm. Obvious correlation was found between corrosion inhibition efficiency and quantum chemical parameters obtained by B3LYP/6-31g(d) method. The obtained theoretical results have been compared with the experimental findings.
机译：两个Schiff碱2- {[（（4-甲氧基苯基）亚氨基]甲基}苯酚和1-{[（（4-甲氧基苯基）亚氨基]甲基}-作为Schiff碱在0.1 M和1 M H_2SO_4中作为钢腐蚀抑制剂的效率用Tafel外推法和线性极化法研究了2-萘酚（分别简称为SB-1和SB-2）。根据电流-电位曲线确定腐蚀参数和吸附等温线。发现抑制效率的百分数（η％）和表面覆盖率（θ）随着抑制剂浓度的增加而增加。结果表明，这些化合物尤其在高浓度下可作为良好的腐蚀抑制剂。用过的化合物在钢表面的吸附符合朗缪尔等温线。腐蚀抑制效率与通过B3LYP / 6-31g（d）方法获得的量子化学参数之间存在明显的相关性。将获得的理论结果与实验结果进行了比较。

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