Method of coloring magnesium material, and housing made of colored magnesium material
AssigneeFujitsu Limited
InventorsYasuo Naganuma, Masami Tsutsumi
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Abstract
A housing made of a magnesium material is colored by a non-painting process. In this process, an anode oxide film is grown on the surface of the housing by subjecting the housing to anodization. The anode oxide film is colored without a paint being applied to the surface of the film.
Claims8
A method of coloring an object made of a magnesium material selected from the group consisting of pure metal magnesium and a magnesium alloy, the method comprising growing an anode oxide film on a surface of said object by subjecting said object to anodization, the anode oxide film being colored by a non-painting process;
- wherein said anodization utilizes an electrolyte containing a particulate pigment, the color of the anode oxide film being provided by allowing the particulate pigment to be taken into the anode oxide film growing on said surface of said object.
A method of coloring an object made of a magnesium material selected from the group consisting of pure metal magnesium and a magnesium alloy, the method comprising growing an anode oxide film on a surface of said object by subjecting said object to anodization, the anode oxide film being colored by a non-painting process, the method further comprising the steps of:
- activating a surface of the anode oxide film;
- and
- dyeing the activated surface with a dye to provide the color of the anode oxide film;
- wherein the surface of the anode oxide film is roughened in the activating step by exposure to one selected from the group consisting of a complexing agent and a pyrophosphate.
A method of coloring an object made of a magnesium material selected from the group consisting of pure metal magnesium and a magnesium alloy, the method comprising growing an anode oxide film on a surface of said object by subjecting said object to anodization, the anode oxide film being colored by a non-painting process, the method further comprising the steps of:
- activating a surface of the anode oxide film;
- and
- dyeing the activated surface with a dye to provide the color of the anode oxide film;
- wherein the surface of the anode oxide film is chemically modified in the activating step by exposure to a silane coupling agent having an amino group.
Dependencies are inferred from the claim text.