Corrosion resistance of HRB500 carbon steel in alkaline environment with various inhibitor and NaClconcentrations were investigated using electrochemical impedance spectroscopy (EIS), potentiodynamicpolarization, and scanning electron microscope. The inhibition effect of white mulberry leaves extract(WMLE) on carbon steels in alkaline media were studied. Results revealed that inhibitor and chloridevalues played a significant role in the formation of protective passive layers on the steel surface. TheEIS analysis is in agreement with the best-fit results for double-layer capacitance of solution–steelinterface which were steadily increased over 126.5 μFcm-2 with 4 wt% NaCl in the alkaline solution,indicating that produced corrosion can occur on the steel surface. Results achieved from electrochemicalanalysis indicated that a high value of inhibition efficiency (88%) was obtained in the presence of 400mg/L WMLE at room temperature..
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机译：使用电化学阻抗光谱（EIS），电位动力分散和扫描电子显微镜研究了HRB500碳钢中HRB500碳钢在碱性环境中的耐腐蚀性和Naclcontation。研究了白桑叶提取物（WMLE）对碱性培养基中碳钢的抑制作用。结果表明，抑制剂和氯化物值在钢表面上的保护无源层的形成中发挥了重要作用。 TheEIS分析与溶液 - 钢制界面的双层电容的最佳拟合结果一致，其在碱性溶液中具有4wt％NaCl的126.5μFCM-2稳定增加，表明钢表面上可能发生产生的腐蚀。从电化学碱基获得的结果表明，在室温下在400mg / L WMLE存在下获得高值抑制效率（88％）。
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