Yang Feng, Liu Yu, Liu Tong, Liu Shuan, Zhao Haichao
School of Materials Science and Engineering, ShenYang University of Chemical Technology ShenYang 110142 China.
Key Laboratory of Marine Materials and Related Technologies, Zhejiang Key Laboratory of Marine Materials and Protective Technologies, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences Ningbo 315201 China
RSC Adv. 2019 Sep 25;9(52):30249-30258. doi: 10.1039/c9ra04047a. eCollection 2019 Sep 23.
In this work, a water-soluble host-guest complex containing carboxymethylated beta-cyclodextrin (CM-β-CD) and an aniline trimer (AT) was synthesized. The application of AT-CM-β-CD as an inhibitor for alleviating the corrosion of Q235 carbon steel in 1 M HCl solution was investigated by potentiodynamic polarization and electrochemical impedance spectroscopy (EIS). Results showed that the inhibition efficiency was significantly increased in the presence of AT-CM-β-CD, and the inhibition efficiency was up to 99.2% when the concentration of AT-CM-β-CD was 250 mg L. Field emission scanning electron microscopy (SEM) and laser scanning confocal microscopy (LSCM) confirmed that the corrosion inhibitor had excellent corrosion inhibition effects due to the formation of an adsorption film on the surface of Q235 carbon steel. According to the data extracted from the Langmuir adsorption model, AT-CM-β-CD absorption involves both physisorption and chemisorption.
在本工作中，合成了一种包含羧甲基化β-环糊精（CM-β-CD）和苯胺三聚体（AT）的水溶性主客体复合物。通过动电位极化和电化学阻抗谱（EIS）研究了AT-CM-β-CD作为缓蚀剂在1 M HCl溶液中缓解Q235碳钢腐蚀的应用。结果表明，在AT-CM-β-CD存在下，缓蚀效率显著提高，当AT-CM-β-CD浓度为250 mg/L时，缓蚀效率高达99.2%。场发射扫描电子显微镜（SEM）和激光扫描共聚焦显微镜（LSCM）证实，由于在Q235碳钢表面形成了吸附膜，该缓蚀剂具有优异的缓蚀效果。根据从朗缪尔吸附模型提取的数据，AT-CM-β-CD的吸附涉及物理吸附和化学吸附。
