This study investigated the effect of l-methionine (LMT) on the corrosion behavior of AISI309S stainless steel in 1 M H₂SO₄ solution using electrochemical impedance spectroscopy (EIS), Tafel polarization, and electrochemical noise methods. The performance of corrosion inhibition was analyzed by scanning electron microscopy, atomic force microscopy, adsorption isotherms, x-ray photoelectron spectroscopy (XPS), and contact angle measurement. The electrochemical studies revealed a significant increase in the charge transfer resistance and a reduction in the corrosion current density in the presence of LMT in the acidic media. The results of the EIS and Tafel tests determined the corrosion inhibition efficiency to be about 97% and 95%, respectively. The microscopy analysis showed that the surface suffered lower corrosion damages in the presence of LMT. Besides, the adsorption of LMT on the anodic sites of the surface through its sulfur atom was verified by EIS and XPS studies.

这项研究调查了l-蛋氨酸（LMT）对AISI309S不锈钢在1 MH ₂ SO _4中的腐蚀行为的影响解决方案使用电化学阻抗谱（EIS），Tafel极化和电化学噪声方法。通过扫描电子显微镜，原子力显微镜，吸附等温线，X射线光电子能谱（XPS）和接触角测量来分析腐蚀抑制性能。电化学研究表明，在酸性介质中存在LMT的情况下，电荷转移电阻显着增加，腐蚀电流密度降低。EIS和Tafel测试的结果分别确定了缓蚀效率约为97％和95％。显微镜分析表明，在存在LMT的情况下，表面遭受的腐蚀损害较小。除了，