Abstract

The inhibitive action of cysteine was investigated against the corrosion of aluminium alloy 6061-T6 (AA6061-T6) in a 0.5 M hydrochloric acidic medium in the temperatures range of 303–323 K using potentiodynamic polarization as well as electrochemical impedance spectroscopy methods. The electrochemical results of the former were validated by the latter. Cysteine showed mixed inhibitor behavior and exhibited good inhibition performance. The thermodynamic properties indicated mixed adsorption behavior of cysteine, which satisfied the Langmuir adsorption isotherm. The surface morphological investigation of both corroded and inhibited specimens was performed using a scanning electron microscopy and atomic force microscope, which revealed the adsorption of cysteine onto the alloy surface.

中文翻译：

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半胱氨酸作为环保抑制剂对0.5M HCl中AA6061-T6腐蚀的影响：电化学和表面研究

摘要

使用电位动力学极化和电化学阻抗谱方法研究了半胱氨酸在温度为303-323 K的0.5 M盐酸介质中对铝合金6061-T6（AA6061-T6）的腐蚀的抑制作用。前者的电化学结果被后者验证。半胱氨酸表现出混合的抑制剂行为并表现出良好的抑制性能。热力学性质表明半胱氨酸的混合吸附行为，满足Langmuir吸附等温线。使用扫描电子显微镜和原子力显微镜对腐蚀和抑制的样品进行了表面形态研究，结果表明半胱氨酸在合金表面上的吸附。