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首页> 外文期刊>Journal of Materials Engineering and Performance >Inhibition of Aluminum Alloy Corrosion in 0.5 M Nitric Acid Solution by 4-4-Dimethyloxazolidine-2-thione
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Inhibition of Aluminum Alloy Corrosion in 0.5 M Nitric Acid Solution by 4-4-Dimethyloxazolidine-2-thione

机译：4-4-二甲基恶唑烷-2-硫酮对0.5 M硝酸溶液中铝合金腐蚀的抑制作用

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摘要

The corrosion inhibition of Al-Alloy (Al2024) in 0.5 M nitric acid solution at 30℃ was achieved using 4-4-dimethyloxazolidine-2-thione (DMT) as a corrosion inhibitor. The electrochemical performance of the DMT was studied by electrochemical impedance spectroscopy (EIS), potentiodynamic polarization measurements, and scanning electron microscopic study (SEM). The results indicated that DMT acts as an inhibitor for Al2024 in 0.5 M nitric acid. Polarization curves indicated that DMT was a mixed-type inhibitor. Inhibition efficiencies were observed to be increased with an increase in DMT concentration and attains approximately to 93.4% at 2 mM of DMT in 0.5 M nitric acid. The adsorption of DMT model on Al2024 surface obeyed in accordance with Langmuir adsorption isotherm model. The value of the free energy of adsorption ΔG_(ads) indicated that the adsorption of DMT molecule was a spontaneous process and was typical of physical and chemical adsorption.
机译：使用4-4-二甲基恶唑烷-2-硫酮（DMT）作为缓蚀剂，可以在30℃的0.5 M硝酸溶液中抑制铝合金（Al2024）的腐蚀。通过电化学阻抗谱（EIS），电势极化测量和扫描电子显微镜研究（SEM）研究了DMT的电化学性能。结果表明，DMT在0.5 M硝酸中充当Al2024的抑制剂。极化曲线表明DMT是一种混合型抑制剂。观察到抑制效率随DMT浓度的增加而增加，并在0.5 M硝酸中于2 mM DMT时达到约93.4％。根据Langmuir吸附等温线模型，DMT模型在Al2024表面的吸附遵循。吸附自由能的值ΔG_（ads）表明DMT分子的吸附是自发过程，是物理和化学吸附的典型过程。

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