In the present work, the Curam drug was used as an eco-friendly corrosion inhibitor for the protection of stainless steel 304 (SS-304) in 2.0 M HCl solution. The inhibition efficiency was determined by mass loss (ML), Potentiodynamic polarization (PDP), and electrochemical impedance spectroscopy (EIS) measurements. The surface morphology analysis carried out using Fourier transform infrared spectroscopy (FT-IR) and atomic force microscopy (AFM). ML data prove that with an increase in the temperature, Curam still exhibits good anti-corrosion performance. The inhibition efficiency of Curam can still be maintained at about 72% at 318 K. The data of electrochemical measurements indicate that Curam is the mixed-type inhibitor. The adsorption process of Curam on the SS-304 surface obeys the Langmuir adsorption isotherm. FT-IR and AFM analysis showed the excellent inhibition performance of Curam for SS-304 dissolution in an acidic medium. The data obtained by chemical and electrochemical measurements are in good agreement with one another.

中文翻译：

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评价Curam药物作为一种环保腐蚀抑制剂，以保护304不锈钢在盐酸溶液中的作用：化学，电化学和表面形态研究

在目前的工作中，Curam药物被用作环保型缓蚀剂，用于在2.0 M HCl溶液中保护不锈钢304（SS-304）。抑制效率由质量损失（ML），恒动力极化（PDP）和电化学阻抗谱（EIS）测量确定。使用傅里叶变换红外光谱（FT-IR）和原子力显微镜（AFM）进行表面形态分析。ML数据证明，随着温度的升高，Curam仍显示出良好的防腐性能。在318 K下，Curam的抑制效率仍可保持在72％左右。电化学测量数据表明，Curam是混合型抑制剂。库拉姆在SS-304表面的吸附过程遵循Langmuir吸附等温线。FT-IR和AFM分析表明，Curam对SS-304在酸性介质中的溶解具有优异的抑制性能。通过化学和电化学测量获得的数据彼此非常吻合。