Abstract In this study, the effect of penicillin V (a common antibiotic in the treatment of infectious diseases) as an environmentally friendly inhibitor on low carbon steel in the simulated acidic sour water corrosion (corrosive oxygenated solution based on Na2S + Na2SO4; pH = 3) were investigated by potentiodynamic polarization and immersion tests at different temperatures and concentrations of the inhibitor. The results showed that at a concentration of 500 ppm at 25 °C, the inhibition efficiency was 94.2%, which decreased with increasing temperature. The results of the FTIR test from the surface of the samples indicate the possible formation of compounds of nitrogen-hydrogen, carbon-nitrogen, and generally nitrogen with heteroatoms as well as the presence of oxygenated compounds similar to those of organic compounds. The surface adsorption of the inhibitor accomplishes the inhibition mechanism onto the metal surface, and its adsorption is carried out following the Langmuir adsorption isotherm. Thermodynamic parameters were also calculated and discussed. UV–vis analysis results showed that the inhibitor on the metal surface formed complexes with metal ions through its functional groups. The complex built on the metal surface occupies a large surface area and by blocking the metal from corrosive factors, it reduces the charge and ion transfer at the metal surface and increases its corrosion resistance.

中文翻译：

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含硫化氢腐蚀气体环境下使用口服青霉素作为低碳钢新型环保缓蚀剂

摘要 本研究在模拟酸性酸性水腐蚀（基于Na2S+Na2SO4的腐蚀性含氧溶液；pH=3）中，青霉素V（一种治疗传染病的常用抗生素）作为环保抑制剂对低碳钢的影响。 ) 在不同温度和抑制剂浓度下通过动电位极化和浸泡试验进行了研究。结果表明，在 25 ℃下，浓度为 500 ppm 时，抑制效率为 94.2%，随温度升高而降低。样品表面的 FTIR 测试结果表明，可能形成氮氢化合物、碳氮化合物，通常是氮与杂原子的化合物，以及与有机化合物类似的含氧化合物的存在。抑制剂的表面吸附实现了对金属表面的抑制机制，其吸附遵循朗缪尔吸附等温线。还计算和讨论了热力学参数。UV-vis分析结果表明，金属表面的抑制剂通过其官能团与金属离子形成络合物。建立在金属表面的络合物占据了很大的表面积，通过阻止金属受到腐蚀因素的影响，减少了金属表面的电荷和离子转移，增加了其耐腐蚀性。UV-vis分析结果表明，金属表面的抑制剂通过其官能团与金属离子形成络合物。建立在金属表面的络合物占据了很大的表面积，通过阻止金属受到腐蚀因素的影响，减少了金属表面的电荷和离子转移，增加了其耐腐蚀性。UV-vis分析结果表明，金属表面的抑制剂通过其官能团与金属离子形成络合物。建立在金属表面的络合物占据了很大的表面积，通过阻止金属受到腐蚀因素的影响，减少了金属表面的电荷和离子转移，增加了其耐腐蚀性。