Corrosion behavior of titanium dioxide (TiO₂)-coated Al alloy in saline environment

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Show simple item record Rabbey, Md Fazlay 2018-12-21T01:02:21Z 2018-12-21T01:02:21Z 2018-08
dc.description Master's Project (M.S.) University of Alaska Fairbanks, 2018 en_US
dc.description.abstract Al alloys have been used in many applications, however, they are susceptible to corrosion when exposed in saline environment. In this work, TiO₂ nanoellipsoids with aspect ratios (AR) of 1, 2, 4 and 6 were synthesized, TiO₂ coatings of AR 1, AR2, AR4, and AR6 were fabricated on AA2024-T3 Al alloy substrate, and their corrosion behaviors in the saline environment were investigated by analyzing the scanning electron microscope (SEM) imaging, potentiodynamic polarization scans and electrochemical impedance spectroscopy. TiO₂-coated Al samples showed better corrosion performance compared to the bare Al sample. Among the coated samples, TiO₂ AR6 coated samples showed lower corrosion rate compared to other samples. Although TiO₂ nanoellipsoids coatings show good corrosion resistance, it is noted that TiO₂ coatings are porous, which allows the penetration of corrosive media through the pores to reach the surface of the substrate. A polystyrene (PS)-TiO₂ AR6 nanocomposite coating was fabricated, where the pores of the coatings were sealed by polystyrene, which is expected to further improve the corrosion resistance of TiO₂ coatings. en_US
dc.language.iso en_US en_US
dc.subject Titanium dioxide en_US
dc.subject Corrosion en_US
dc.subject Aluminum alloys en_US
dc.subject Prevention en_US
dc.title Corrosion behavior of titanium dioxide (TiO₂)-coated Al alloy in saline environment en_US
dc.type Other en_US ms
dc.identifier.department Department of Mechanical Engineering
dc.contributor.chair Zhang, Lei
dc.contributor.committee Zhang, Junqing
dc.contributor.committee Huang, Daisy
dc.contributor.committee Peterson, Rorik

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