文献类型：期刊文献

英文题名：Improved corrosion resistance and hydrophobic stability of sol-gel coatings by benzoxazine modification on aluminum alloys AA1060

作者：Zhou, Zhou[1];Liu, Juan[2];Meng, Xin[1];Zhou, Changlu[1]

机构：[1]East China Univ Sci & Technol, Sch Chem Engn, Shanghai Key Lab Multiphase Mat, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Res Ctr Anal & Test, Shanghai 200237, Peoples R China

年份：2024

卷号：21

期号：3

起止页码：893

外文期刊名：JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH

收录：;EI(收录号：20235015208608);WOS:【SCI-EXPANDED(收录号:WOS:001120142100001)】；

基金：The authors acknowledge the National Natural Science Foundation of China (21978086, 22278139), Shanghai Pujiang Program (2020PJD015), Shanghai Municipal Science and Technology Commission (21520761100), the Fundamental Research Funds for the Central Universities.

语种：英文

外文关键词：Benzoxazine; Silane; Sol-gel; Corrosion protection; Aluminum alloys

摘要：A series of sol-gel coatings based on tetraethoxysilane (TEOS) was adopted in order to provide corrosion protection for aluminum alloys AA1060, which were modified by incorporating various ratios of silane-functionalized benzoxazine (Bz), labeled as Bz-based sol-gel coatings. Fourier transform infrared spectra were utilized to characterize the crosslinking network of Bz-based sol-gel coatings through calculating the conversion of Bz structure after the curing process, which was also further confirmed by the gel content test. Both hydrophobicity and corrosion resistance of Bz-based sol-gel coatings were fully investigated with the assistance of water contact angle (WCA) measurements, electrochemical impedance spectroscopy (EIS), and salt spray test. Bz incorporation could improve hydrophobic stability and corrosion resistance of Bz-based sol-gel coatings with increasing the Bz content during the 30-day immersion in a 3.5 wt% NaCl aqueous solution. Better performance of Bz-based sol-gel coatings than that of a control TEOS coating with a WCA above 93 degrees and a charge-transfer resistance over 100 k omega cm2 after 30-day EIS measurement shows their effective protective property for aluminum alloys.