Abstract The inhibition effect of 5-amino 1,3,4-thiadiazole-2-thiol (5-ATT) on the corrosion of mild steel in 1 M HCl solution at 303 K was studied practicing weight loss, electrochemical electrochemical (AC and DC) studies and X-ray photoelectron spectroscopy (XPS) methods. The obtained results showed that 5-ATT was an effective inhibitor in HCl medium. The inhibition efficiency, η(%), increased with the increase in concentration inhibitor but the temperature has almost no effect on the inhibition efficiency of 5-ATT. The activation dissolution thermodynamic parameters were calculated and discussed. Thermodynamic data and XPS analysis clearly show that the adsorption mechanism of 5-ATT on the mild steel surface in 1 M HCl solution is mainly electrostatic-adsorption. Tafel curves reveal that 5-ATT behaves as a mixed-type inhibitor with cathodic predominance and obeyed Langmuir adsorption isotherm. With the aim of extracting the parameters of the electrochemical impedance spectroscopy an appropriate equivalent circuit model was offered.

中文翻译：

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盐酸介质中 5-氨基 1,3,4-噻二唑-2-硫醇对低碳钢的吸附和缓蚀性能：热力学、表面和电化学研究

摘要 通过失重、电化学（交流和直流）实验研究了 5-氨基 1,3,4-噻二唑-2-硫醇 (5-ATT) 在 1 M HCl 溶液中 303 K 对低碳钢腐蚀的抑制作用。 ) 研究和 X 射线光电子能谱 (XPS) 方法。所得结果表明5-ATT在HCl介质中是一种有效的抑制剂。抑制效率η(%)随着抑制剂浓度的增加而增加，但温度对5-ATT的抑制效率几乎没有影响。计算并讨论了活化溶解热力学参数。热力学数据和 XPS 分析清楚地表明，5-ATT 在 1 M HCl 溶液中低碳钢表面的吸附机制主要是静电吸附。Tafel 曲线显示 5-ATT 表现为阴极占优势的混合型抑制剂，并遵守朗缪尔吸附等温线。为了提取电化学阻抗谱的参数，提供了适当的等效电路模型。