ABSTRACT The corrosion inhibition performances of thiourea (TU), l-cysteine (CYS), sodium dodecyl sulfonate (SDS), tetradecyl trimethyl ammonium bromide (TTAB), N-benzyl pyridinium chloride (BPC) and imidazoline quaternary ammonium salt (IAS) in CO2-saturated and CO2/H2S coexistent brine solutions were investigated by electrochemical measurement, weight-loss test, molecular dynamics simulation and SEM observation. The results show that H2S can remarkably affect the adsorption of some inhibitors on the steel surface and the inhibition performance. In detail, the inhibition performances of TU, CYS and SDS, which are effective in the CO2 environment, deteriorate in the CO2/H2S environment. However, the cationic inhibitors (TTAB, BPC and IAS) exhibit good inhibition performance in the CO2/H2S environment possibly because of a relatively strong interaction between inhibitor cations and HS− ions. The finding of this study delivers a provable method to predict the performance of inhibitors in the aggressive solution containing H2S.

中文翻译：

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碳钢各种缓蚀剂在CO2和CO2/H2S环境中缓蚀性能的研究

摘要 硫脲 (TU)、l-半胱氨酸 (CYS)、十二烷基磺酸钠 (SDS)、十四烷基三甲基溴化铵 (TTAB)、N-苄基氯化吡啶 (BPC) 和咪唑啉季铵盐 (IAS) 的缓蚀性能通过电化学测量、失重试验、分子动力学模拟和扫描电镜观察研究了 CO2 饱和和 CO2/H2S 共存盐水溶液。结果表明，H2S对某些缓蚀剂在钢表面的吸附和缓蚀性能有显着影响。具体而言，在 CO2 环境中有效的 TU、CYS 和 SDS 的抑制性能在 CO2/H2S 环境中恶化。然而，阳离子抑制剂（TTAB、BPC 和 IAS) 在 CO2/H2S 环境中表现出良好的抑制性能，这可能是因为抑制剂阳离子和 HS− 离子之间的相互作用较强。这项研究的发现提供了一种可证明的方法来预测抑制剂在含有 H2S 的腐蚀性溶液中的性能。