Surface treatment method for aluminum exterior part of vehicle
AssigneesHyundai Motor Company, Kia Motors Corporation
InventorChang-Yeol Yoo
Life of this patent
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Abstract
A surface treatment method for an aluminum exterior part of a vehicle includes: pre-treating the aluminum exterior part comprising aluminum or an aluminum alloy; etching a surface of the pre-treated aluminum exterior part by immersing the pre-treated aluminum exterior part in an etching solution; forming an oxide layer on the surface of the aluminum exterior part by immersing the aluminum exterior part, which is subjected to the etching, in a hydrothermal synthetic solution; and forming an electrodeposition coating layer on the surface of the aluminum exterior part, which is subjected to the forming the oxide layer.
Claims10
A surface treatment method for an aluminum exterior part of a vehicle, comprising:
- pre-treating the aluminum exterior part comprising aluminum or an aluminum alloy;
- etching a surface of the pre-treated aluminum exterior part by immersing the pre-treated aluminum exterior part in an etching solution;
- forming an oxide layer on the surface of the aluminum exterior part by immersing the aluminum exterior part, which is subjected to the etching, in a hydrothermal synthetic solution;
- and
- forming an electrodeposition coating layer on the surface of the aluminum exterior part, which is subjected to the forming the oxide layer,
- wherein the hydrothermal synthetic solution contains zirconium nitrate (Zr(NO3)4) of 0.1 to 1 mole (M), hexamethylenetetramine of 0.1 to 1 mole (M), and remainder of water based on a total hydrothermal synthetic solution.
Dependencies are inferred from the claim text.