An assessment of the corrosion protection of AA2024-T3 treated with vinyltrimethoxysilane/(3-glycidyloxypropyl)trimethoxysilane

作者：Dalmoro V; dos Santos J H Z; Aleman C; Azambuja D S^*

来源：Corrosion Science, 2015, 92: 200-208.

DOI：10.1016/j.corsci.2014.12.001

• Aluminum
• Metal coatings
• EIS

The protection of aluminum alloy 2024-T3 imparted by (3-glycidyloxypropyl)trimethoxysilane (GPTMS)/vinyltrimetoxysilane (VTMS) sol-gel films and the incorporation of ethylenediamine tetra(methylenephosphonic acid) (EDTPO) into silica matrix has been investigated. The corrosion behavior in chloride solution depends on the GPTMS/VTMS ratio. The protective performance has been improved by achieving a better coverage surface through the addition of EDTPO to sal-gel films. Nevertheless, EDTPO catalyzes the opening of epoxy ring, promoting the hydrophilic character of the silica surface. On the other hand, the incorporation of functionalized silica nanoparticles into silica/EDTPO matrix affords long-term corrosion protection due to the enhancement of barrier properties.

• 出版日期2015-3