Surface treatment method for aluminum alloy and surface treatment method for magnesium alloy
AssigneesUlvac, Inc., Ulvac Techno, Ltd.
InventorsShunji Misawa, Sakae Inayoshi, Hiroshi Sato
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Abstract
The present invention provides a surface treatment method for an aluminum alloy and a surface treatment method for a magnesium alloy, which enable providing the surface of an aluminum alloy containing magnesium or the surface of a magnesium alloy with sufficient corrosion resistance to corrosive gases, while preventing the surface from scattering magnesium therefrom even when used in a vacuum at a temperature of not less than 300° C. In this method, a carbon fluoride compound is applied over the surface of the aluminum alloy containing magnesium or the surface of the magnesium alloy, followed by heating in an oxygen atmosphere, thereby forming a fluoride passivation film.
Claims10
A surface treatment method for an aluminum alloy comprising:
- forming a fluoride passivation film on a surface of the aluminum alloy containing magnesium by applying a solution which is obtained by dispersing a carbon fluoride compound in alkyl ether, ethyl acetate, or butyl acetate over the surface of the aluminum alloy containing magnesium and then heating in an oxygen atmosphere,
- wherein a content rate of the carbon fluoride compound is equal to or more than 30% by weight and equal to or less than 50% by weight.
A surface treatment method for a magnesium alloy comprising:
- forming a fluoride passivation film on a surface of the magnesium alloy by applying a solution which is obtained by dispersing a carbon fluoride compound in alkyl ether, ethyl acetate, or butyl acetate over the surface of the magnesium alloy and then heating in an oxygen atmosphere,
- wherein a content rate of the carbon fluoride compound is equal to or more than 30% by weight and equal to or less than 50% by weight.
Dependencies are inferred from the claim text.