化学吸附
物理吸附
X射线光电子能谱
吸附
化学
壳聚糖
朗缪尔吸附模型
盐酸
结晶度
接触角
核化学
两性离子
电化学
缓蚀剂
腐蚀
物理化学
无机化学
分析化学(期刊)
分子
化学工程
材料科学
结晶学
有机化学
复合材料
电极
工程类
作者
Xiaohu Luo,Bin Chen,Ji Li,Chengliang Zhou,Guang Meng,Kaimei Peng,Hong Dai,Bang Lan,Wentao Xiong,Yali Liu
标识
DOI:10.1016/j.ijbiomac.2024.131429
摘要
Herein, a novel chitosan Schiff base (CS-FGA) as a sustainable corrosion inhibitor has been successfully synthesized via a simple amidation reaction by using an imidazolium zwitterion and chitosan (CS). The corrosion inhibition property of CS-FGA for mild steel (MS) in a 1.0 M HCl solution was studied by various electrochemical tests and physical characterization methods. The findings indicate that the maximum inhibition efficiency of CS-FGA as a mixed-type inhibitor for MS in 1.0 M HCl solution with 400 mg L-1 reaches 97.6 %, much much higher than the CS and the recently reported chitosan-based inhibitors. Scanning electron microscopy (SEM), atomic force microscopy (AFM), and water contact angle (WCA) results reveal that the CS-FGA molecules firmly adsorb on the MS surface to form a protective layer. The adsorption of CS-FGA on the MS surface belongs to the Langmuir adsorption isotherm containing both the physisorption and chemisorption. According to the X-ray photoelectron spectroscopy (XPS) and UV-vis spectrum, FeN bonds presented on the MS surface further prove the chemisorption between CS-FGA and Fe to generate the stable protective layer. Additionally, theoretical calculations from quantum chemical calculation (DFT) and molecular simulations (MD) were performed to reveal the inhibition mechanism of CS-FGA.
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