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

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-lin...

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Published inPolymers Vol. 14; no. 15; p. 3076
Main Authors Yuan, Xin, Du, Yilin, Lin, Zhihai, Liu, Zhiqiang, Gu, Lin
Format Journal Article
LanguageEnglish
Published Basel MDPI AG 29.07.2022
MDPI
Subjects
3-glycidoxypropyltrimethoxy silane
Aluminum base alloys
Corrosion effects
Corrosion prevention
Corrosion resistance
Crosslinking
Curing
DSC
EIS
Electrodes
Electrolytes
Epoxy coatings
Epoxy resins
model validation
Performance evaluation
Polymers
Protective coatings
Salt spray tests
silicone-epoxy coatings
Silicones
Water absorption
water uptake
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Summary: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.
Bibliography:ObjectType-Article-1
SourceType-Scholarly Journals-1
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content type line 23
ISSN:2073-4360
2073-4360
DOI:10.3390/polym14153076