Inhibition ability of green tea extract (GTE) on the C38 steel (CS) in 1.0 M HCl was evaluated using different methods such as: weight loss, electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization (PDP) methods at various temperatures. Polarisation curves show that GTE acts essentially as mixed-type inhibitor controlling cathodic and anodic reactions with slight predominant in cathodic branches. EIS results indicate the increase of resistance transfer (Rt) while double layer capacitance (Cdl) decrease in the rise of green tea extract (GTE) concentrations. Obtained results also showed that the inhibition efficiency decreased with a rise in the temperature. Activation * * energy (Ea), enthalpy (?Ha ) and entropy and (?Sa ) of corrosion process were estimated using experimental measurements.
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机译：使用不同的方法评估绿茶提取物（GTE）对C38钢（CS）在1.0 M HCl中的抑制能力，例如：失重，电化学阻抗谱（EIS）和电势极化（PDP）在不同温度下的方法。极化曲线表明，GTE本质上起着混合型抑制剂的作用，控制着阴极和阳极反应，在阴极分支中略占优势。 EIS结果表明，随着绿茶提取物（GTE）浓度的增加，电阻传递（Rt）增加，而双层电容（Cdl）减小。所得结果还表明，抑制效率随着温度的升高而降低。使用实验测量值估算腐蚀过程的活化能*（Ea），焓（ΔHa）和熵和（ΔSa）。
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