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

Autor:	Xin Yuan, Yilin Du, Zhihai Lin, Zhiqiang Liu, Lin Gu
Jazyk:	angličtina
Rok vydání:	2022
Předmět:	Polymers and Plastics General Chemistry silicone-epoxy coatings 3-glycidoxypropyltrimethoxy silane EIS DSC water uptake model validation Al-alloy
Zdroj:	Polymers; Volume 14; Issue 15; Pages: 3076
ISSN:	2073-4360
DOI:	10.3390/polym14153076
Popis:	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.
Databáze:	OpenAIRE
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