What are the surface treatment of aluminum?

(1) Sand spray:

The main function is surface cleaning. Before coating (painting or plastic), sand spraying can increase the surface roughness, which has a certain contribution to the increased adhesion.

(2) passivation:

It is a way to transform the metal surface into a state that is not easy to be oxidized and delay the corrosion speed of the metal.

(3) Coloring:

There are two main processes for aluminum coloring: one is aluminum oxide coloring technology, and the other is aluminum electric swimming color.

(4) Chemical polishing:

The selective self -dissolving effect of aluminum and aluminum alloy in acidic or alkaline electrolyte solutions is used to reduce the surface of the year -on -year polishing annual surface to reduce the chemical processing method of its surface roughness and pH.

(5) Chemical oxidation:

The oxide film is thin, the thickness is about 0.5 to 4 microns, and the pores are soft, soft, and have good adsorption. They can be used as the bottom layer of organic coating, but their abrasion resistance and corrosion resistance are not as good as anode oxide film.

(6) Spray:

The external protection and decoration of the device is usually performed on the basis of oxidation.

(7) Electrochemical oxidation:

The chemical oxidation equipment of aluminum and aluminum alloy is simple, convenient to operate, high production efficiency, does not consume electricity, has a wide range of applications, and is not limited by parts and shapes.

(8) anode oxidation:

It is the process of using electrolytic principles to be plated on the surface of certain metals on the surface of a thin layer of metal or alloys. Brush plating is used for local plating or repair.

(9) Spray:

The external protection and decoration of the device is usually performed on the basis of oxidation.