Mirror surface aluminum coated directly

Mirror aluminum surface direct coating method belongs to the technical field of aluminum and its alloys. The method comprises the steps of: washing the surface of the aluminum plate with water, dilute acid and alkaline solution; and cleaning the aluminum plate by vacuum coating with a ceramic material to form a thin film on the surface of the aluminum plate. The ceramic material is Si3N4, Ti3N4, which is made by the method of the present invention. Mirror aluminum, the film layer formed on the surface is not only diverse in color, good in appearance, corrosion resistance, abrasion resistance and anti-mite resistance; but also the method is simple in process, less in environmental pollution, and low in production cost, which is favorable for large-scale industrial production.

A method for direct film coating on a surface of a mirror aluminum, which comprises cleaning the surface of the aluminum plate with water, a dilute acid, and a lye; and the aluminum plate after cleaning is vacuum coated with a ceramic material to form a thin film on the surface of the aluminum plate.

2. The method of claim 1, wherein the dilute acid is a dilute hydrochloric acid with a mass fraction of 1%-5%, a dilute nitric acid content is 1%-5%, and the mass fraction is One of 1%-5% dilute sulfuric acid, and the alkali solution is an inorganic alkali solution.

The method for directly coating a mirror aluminum surface according to claim 1 or 2, wherein the ceramic material is one or two of Si3N4 and Ti3N4.

The method for directly coating a mirror aluminum surface according to claim 1 or 2, wherein the thickness of the thin film formed on the surface of the aluminum plate after the vacuum coating is 5-15μm.

5. The method for directly coating a mirror surface aluminum surface according to claim 3, wherein the thickness of the thin film formed on the surface of the aluminum plate after the vacuum coating is 5 to 15 μm.