GLYMO处理的有机硅-环氧涂层对2024铝合金的吸水、附着力及防腐性能的影响

Effect of Water Uptake, Adhesion and Anti-Corrosion Performance for Silicone-Epoxy Coatings Treated with GLYMO on 2024 Al-Alloy.

作者信息

Yuan Xin, Du Yilin, Lin Zhihai, Liu Zhiqiang, Gu Lin

机构信息

School of Chemical Engineering and Technology, Sun Yat-sen University, Zhuhai 510275, China.

Advanced Material Test Center, School of Mechanics and Civil&Architecture, Northwestern Polytechnical University, Xi'an 710129, China.

出版信息

Polymers (Basel). 2022 Jul 29;14(15):3076. doi: 10.3390/polym14153076.

DOI:10.3390/polym14153076

PMID:35956589

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9370607/

Abstract

Water uptake, adhesion and corrosion performance of silicone-epoxy coating on 2024 Al-alloy treated with different GLYMO were systematically studied by gravimetry, electrochemical measurements, DSC, pull-off adhesion and salt spray tests. The results showed that GLYMO not only enhanced the cross-linking of the silicon-epoxy coating but also enhanced the bonding between the coating and the Al-alloy interface. This gives the coating better wet adhesion, less water absorption and improves the corrosion resistance of the coating. The micro-nano silane layer, preferentially between the coating and Al-alloy oxide layer, was validated by the model of the water concentration jump.

摘要

通过重量法、电化学测量、差示扫描量热法、拉开法附着力测试和盐雾试验，系统研究了用不同的γ-缩水甘油醚氧基丙基三甲氧基硅烷（GLYMO）处理的2024铝合金上硅氧烷-环氧树脂涂层的吸水、附着力和腐蚀性能。结果表明，GLYMO不仅增强了硅氧烷-环氧树脂涂层的交联，还增强了涂层与铝合金界面之间的结合力。这使涂层具有更好的湿附着力、更低的吸水率，并提高了涂层的耐腐蚀性。通过水浓度跃变模型验证了在涂层和铝合金氧化层之间优先形成的微纳米硅烷层。