Abstract: In order to study the influence of atomic oxygen and electrochemical corrosion on aluminum alloy, boron nitride nanosheets (BNNS), which can resists atomic oxygen corrosion, were added into epoxy resin to protect aluminum alloy form electrochemical corrosion, and the tests of polarization curve and impedance were carried. The results show that compared with pure epoxy resin, the 0.20% of BNNS can make the pitting potential of the coating increase by 323 mV, the passivation interval increase by 5 times, and the impedance increase by 15 times, and satisfactory effects were obtained. BNNS makes the diffusion channels of ions in the electrolyte become curved and narrow, thus enhancing the coating resistance to electrochemical corrosion.

Keywords: electrochemical corrosion； aluminum alloy； boron nitride nanosheet； composite coating； atomic oxygen corrosion

中图分类号： TB37; TG174

文献标志码：A

文章编号：1008-5548(2021)06-0001-10

DOI:10.13732/j.issn.1008-5548.2021.06.001

收稿日期： 2021-08-04，修回日期：2021-09-27，在线出版时间：2021-10-26 16:11。

基金项目：北京市教委共建项目，编号：25500002016105002；航天科学技术基金项目，编号：BH2020-09。

第一作者简介：张晓静(1984—)，女，博士研究生，实验师，研究方向为二维纳米材料制备及防腐蚀应用。E-mail： zhangxiaojing@buaa.edu.cn。

通信作者简介：沈志刚(1958—)，男，博士，教授，博士生导师，研究方向为二维纳米材料制备及应用。E-mail： shenzhg@buaa.edu.cn。