XU Xiaoyu，LI Li，WANG Jianrong，DUAN Guangbin

(School of Material Science and Engineering，University of Jinan，Jinan 250022，China)

Abstract: In this paper, KH-792 silane was modified by nanoscale polypyrrole prepared by chemical in-situ polymerization to improve the anticorrosion of silane films. The optimal doping amount of polypyrrole for silane solution was determined by electrochemical impedance spectroscopy(EIS), and the modified film with the best corrosion resistance was obtained. The corrosion resistance mechanism of the modified film was investigated by EIS and equivalent circuit fitting data, comparing with the single silane film under the same corrosion condition. The conclusion is that the corrosion resistance of modified film is significantly improved, about 4 times that of a single silane film. The initial corrosion resistanceof modified film is mainly due to the mechanical shielding effect, and the middle and later stage of corrosion resistance is due to the passivation film formed by polypyrrole.

Keywords: nano-polypyrrole; silane film; corrosion resistance; electrochemistry

中图分类号：TG174.4

文献标志码：A

文章编号：1008-5548(2021)06-0070-05

DOI:10.13732/j.issn.1008-5548.2021.06.008

收稿日期： 2021-03-25，修回日期：2021-07-06，在线出版时间：2021-10-18 16:40。

基金项目：国家自然科学基金项目，编号：51501072。

第一作者简介：许潇雨(1991—)，女，硕士，助理实验师，研究方向为材料腐蚀及其控制。E-mail：mse_xuxy@ujn.edu.cn。

通信作者简介：段广彬(1983—)，男，博士，教授，研究方向为建筑科学与工程。E-mail：mse_duangb@ujn.edu.cn。