Abstract—

The inhibiting effect of the expired meloxicam on the corrosion of mild steel (MS) in 1 M HCl was tested by the weight loss, electrochemical frequency modulation, potentiodynamic polarization (PP) and electrochemical impedance spectroscopy techniques. The PP curves showed that this drug acts as mixed type inhibitor. This drug was adsorbed chemically on the MS surface following the Temkin adsorption isotherm. Some thermodynamic parameters were computed and discussed. The results indicated that the protection efficiency increases by raising both the doses of the inhibitor and the temperature of the medium. The morphology of the MS surface was analyzed by scanning electron microscopy, atomic force microscopy, and Fourier transform infrared spectroscopy. All of the obtained results from different techniques are similar.

中文翻译：

---

过期美洛昔康在盐酸溶液中对低碳钢的吸附和耐腐蚀性能

摘要—

通过失重，电化学频率调制，电位动力学极化（PP）和电化学阻抗谱技术测试了过期的美洛昔康对1 M HCl中低碳钢（MS）腐蚀的抑制作用。PP曲线表明该药物起混合型抑制剂的作用。在Temkin吸附等温线之后，该药物化学吸附在MS表面上。计算并讨论了一些热力学参数。结果表明，通过提高抑制剂的剂量和介质的温度都可以提高保护效率。通过扫描电子显微镜，原子力显微镜和傅里叶变换红外光谱分析MS表面的形态。从不同技术获得的所有结果都是相似的。