What is anodizing?

Anodizing is an electrochemical process that converts the metal surface into a decorative, durable, corrosion-resistant, anodic oxide finish. Under the corresponding electrolyte and specific process conditions, and the effect of the external current,aluminum could form a layer of oxide film on aluminum products.

Anodizing is accomplished by immersing the aluminum into an acid electrolyte bath and passing an electric current through the medium. A cathode is mounted to the inside of the anodizing tank; the aluminum acts as an anode, so that oxygen ions are released from the electrolyte to combine with the aluminum atoms at the surface of the part being anodized. Anodizing is, therefore, a matter of highly controlled oxidation the enhancement of a naturally occurring phenomenon.

Anodic oxidation could improve the surface hardness, wear resistance and corrosion resistance of CNC aluminum parts,and can make the surface of aluminum alloy show different colors through coloring process.

How does anodizing work?

Degreasing (degreasing): it is an important process before oxidation. Anodized suppliers use the reagents to clean the cnc aluminum parts.

Alkaline washing( alkaline etching): it is used to further clean up the oily dirt attached to the surface, and remove the natural oxide film and slight scratches on the surface of the aluminum parts.

Anodizing: The aluminum parts are placed in an electrolyte solution using electrolysis to form an oxide layer on the surface.

Dyeing (coloration): CNC aluminum parts can be anodized in different colors—clear, black, red, and gold are most common.

Sealing: In order to improve the surface quality of the aluminum profile and the dyeing and coloring, the fine pores of the oxide film layer must be sealed after coloring. After the sealing treatment, the surface becomes uniform and non-porous, forming a dense oxide film.

Different Aluminum Anodized colors projects

Worthy Hardware has 3 anodizing vendors,all of them are very qualified and high reputation for anodizing process, We have very solid relation-ship with them.As long you inform us the Pantone number,or send us the real samples, we could copy them.

Below is only some real projects for your reference, if you have other colors, welcome to send them to us!