Effect of imidazoline derivatives on the corrosion inhibition of Q235 steel in HCl medium: experimental and theoretical investigation
Effect of imidazoline derivatives on the corrosion inhibition of Q235 steel in HCl medium: experimental and theoretical investigation
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DOI：
10.1515/corrrev-2021-0094
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发表时间：
2022-04
影响因子：
3.2
通讯作者：
Pengjie Wang;Liping Xiong;Zhongyi He;Xin Xu;Jianqiang Hu;Qi Chen;Renhui Zhang;Jibin Pu;Lei Guo
中科院分区：
文献类型：
--
作者：
Pengjie Wang;Liping Xiong;Zhongyi He;Xin Xu;Jianqiang Hu;Qi Chen;Renhui Zhang;Jibin Pu;Lei Guo
本文合成了两个新的咪唑啉衍生物(SMF和SMIF)，并用红外光谱、拉曼光谱和核磁共振技术对其结构进行了确证。通过实验和理论证明了该缓蚀剂在盐酸溶液中的缓蚀能力和缓蚀机理。SMIF在失重实验中的缓蚀率为94.69%，在Tafel实验中为95.99%，在电化学实验中为95.30%。其缓蚀机理是SMF和SMIF在Q235表面形成稳定的保护膜，阻碍电荷转移。EDS、FT-IR和XPS均证明SMF和SMIF缓蚀剂能够稳定地吸附在Q235表面并形成保护膜。DFT和MD也证实了其缓蚀机理。实验和理论计算表明，SMF和SMIF在1M HCl溶液中表现出良好的缓蚀性能。
Abstract In this work, two new imidazoline derivatives (SMF and SMIF) have been synthesized successfully, and their structure have been confirmed by IR, Raman, and NMR techniques. The corrosion inhibition ability and mechanism in HCl solution were proved by experimental and theoretical methods. The inhibition efficiency of SMIF was 94.69% in weight loss experiment, 95.99% (Tafel), and 95.30% (EIS) in electrochemistry. The corrosion inhibition mechanism is that SMF and SMIF form a stable protective film on the surface of Q235 and hinders charge transfer. EDS, FT-IR, and XPS all proved that SMF and SMIF inhibitors could stably adsorb on Q235 surface and form a protective film. The DFT and MD also proved the corrosion inhibiton mechanism. Experiments and theoretical calculations showed that SMF and SMIF exhibited excellent corrosion inhibition performance in 1 M HCl solution.