Abstract
The aeronautics industry uses aluminum alloy AA2024-T3 due to its low density and good mechanical properties. However, this alloy requires the use of protective coatings because it does not have the corrosion and wear resistance required by the aeronautics industry. In this context, this work aims at evaluating the performanceof AA2024-T3 aluminum coated with hybrid films containing graphene oxide. The hybrid films were obtained by a dip coating process from a sol composed by tetraethoxysilane/3 (trimethoxysilylpropyl) methacrylate/cerium nitrate/ethanol/water with different concentrations of graphene oxide in suspension. The morphology was evaluated by Scanning Electron Microscopy. The corrosion resistance and wear behavior of the obtained coatings were characterized by open circuit potential, polarization curves and dry wear tests using constant force in a ball-on-plate tribometer. In the studied conditions, the metal coated with hybrid matrix films containing graphene oxide presented no changes in the corrosion resistance, but it showed a positive contribution to the wear resistance.
Highlights
This paper discusses recent topics involving graphene oxide, composite films and their use in aviation
Electrochemical and mechanical behavior of aluminum AA2024-T3 coated with hybrid matrix containing graphene oxide circuito aberto, curvas de polarização e testes de desgaste a seco com força constante em um tribômetro ball-on-plate
Aluminum alloys were coated with hybrid films obtained from a TEOS and TMSPMA sol prepared with Ce(NO3)3 inhibitor and the coating properties were effected by the addition of graphene oxide (GO)
Summary
This paper discusses recent topics involving graphene oxide, composite films and their use in aviation. Considering environmental problems with the coating material used in aircraft fuselages, this paper aims at obtaining a new protective film that is both in agreement with new environmental standards and more adequate in relation to corrosive effects. The conversion layer is a pre-treated aluminum, which aims at promoting the bonding between aluminum and the primer. In this stage, the aviation industry uses chromium bath to form the conversion layer [1]. The top coat and primer layers are used for decoration, to increase wear resistance and to protect the substrate from corrosion
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