Oil-impregnated nanoporous oxide coating for inhibiting aluminum corrosion
AssigneeThe Trustees of the Stevens Institute of Technology
InventorsChang-Hwan Choi, Junghoon Lee
Life of this patent
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Abstract
A process includes means for depositing an anti-corrosion coating filled with liquid oil on an aluminum substrate. Aluminum is anodized and then treated with a thin hydrophobic sub-coating. The pores created through anodization are then impregnated with liquid oil. Oil penetration is maximized and residual air is minimized by first filling the pores with a filling solution, replacing the filling solution with an exchange fluid, and then replacing the exchange fluid with perfluorinated oil. The oil gives the surface coating anti-wetting properties and self-healing properties, thereby protecting the aluminum substrate underneath from corrosion.
Claims11
1-17. (canceled)
A method for forming a coating on a surface of a metal substrate, said method comprising the steps of:
- anodizing said substrate in oxalic acid to form an oxide layer having a plurality of nanopores, each nanopore having a sidewall;
- and
- filling said plurality of nanopores with a liquid oil.
Dependencies are inferred from the claim text.