Lyophilized hot water extract of Purple Knight leaves (PKLE) has investigated as an environment friendly and cost effective corrosion inhibitor against corrosion of mild steel in 1 M HCl solution. Corrosion inhibition efficiency of PKLE has studied using Gravimetric, potentiodynamic polarization and electrochemical impedance spectroscopic methods.
  PKLE acts as mixed inhibitor and its adsorption on mild steel surface in 1 M HCl solution follows the Langmuir adsorption isotherm. Thermodynamic parameters of the adsorption process and apparent activation energy for the corrosion process have been determined. Both physical and chemical adsorption contributes to the overall adsorption process. Scanning Electron Microscopy reveals a significant protection of metal surface by PKLE molecules.
  The chemical characterization of PKLE is carried out by gas chromatography and FT-IR spectroscopy.

中文翻译：

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紫色骑士树篱工厂的叶子在1 M HCl介质中用于低碳钢的绿色缓蚀剂：电化学，重量分析，吸附和SEM研究

  紫色骑士叶（PKLE）的冻干热水提取物已被研究为一种环保且经济有效的腐蚀抑制剂，可防止低碳钢在1 M HCl溶液中腐蚀。PKLE的腐蚀抑制效率已使用重量分析法，恒电位极化法和电化学阻抗谱法进行了研究。
  PKLE用作混合抑制剂，其在1M HCl溶液中的低碳钢表面吸附遵循Langmuir吸附等温线。已经确定了吸附过程的热力学参数和腐蚀过程的表观活化能。物理吸附和化学吸附都有助于整个吸附过程。扫描电子显微镜揭示了PKLE分子对金属表面的显着保护。
  PKLE的化学表征通过气相色谱和FT-IR光谱进行。