Abstract
In the present research the adhesion of thin anodic coatings of TiO2 (40 nm to 140 nm) is evaluated. Coatings were produced by anodic oxidation of Ti-6Al-4V, using H2SO4 as electrolyte at different voltages (20 V to 70 V), employing heat treatments of 1 h at 500 ℃ and 600 ℃.
The adhesion of coatings was evaluated by scratch test with load rates of 2 N/mm and 4 N/mm and up to 10 N and 20 N of maximum load.
The adhesion was dependent on the increasing load rates. At larger rate a brittle behavior was found and the critical load decreased with heat treatment temperature. For non-heat treated coatings, the critical load of adherence increased with coating thickness.
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Vera, M.L., Rosenberger, M.R., Schvezov, C.E., Ares, A.E. (2015). Adhesion of Anodic Titanium Dioxide Coatings on Titanium Grades 5 Alloys. In: TMS 2015 144th Annual Meeting & Exhibition. Springer, Cham. https://doi.org/10.1007/978-3-319-48127-2_81
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DOI: https://doi.org/10.1007/978-3-319-48127-2_81
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