What is Anodizing?
Anodizing is an electrolytic process that deposits a chemically stable oxide layer on the surface of aluminum. The resulting oxide film is thicker and stronger than the natural oxide coating of aluminum. It is hard, porous, and transparent, and is an integral part of the metal surface, so it will not peel or peel off. Once deposited, the oxide film can be colored in a variety of ways before sealing.
The thickness of the film is graded, and its grade specification depends on the application, ranging from 5 microns to 25 microns. Decorative decoration applications usually use a thickness of 5 microns, and interior applications use a thickness of 10 or 15 microns. The external finish requires a film thickness of 25 microns. Anodizing is suitable for extrusion, casting, rolling, drawing and forging aluminum products.
The thickness of the oxide film obtained by anodizing treatment is generally 5-20um, and the thickness of the hard anodizing film can reach 60-2500um. And what will this anodic oxide film bring us?
The anodic oxide film and the electrochemical process used to produce the anodic oxide film should be harmless to the human body. Therefore, in order to reduce the weight of the products, the convenience of machining, and the environmental protection and low toxicity requirements in many industries, some parts of the current products are made of aluminum alloy hard oxidation instead of stainless steel, hard chromium plating and other processes.
Commonly used materials for anodizing
Aluminum and aluminum alloys, common ones are: 2A12, 5052, 6061, 6063, 7075, etc.; in addition, cast aluminum alloys, such as ADC10, ADC12, A356, A380, etc., are often anodized;
Magnesium alloy: mainly used for conductive oxidation/chemical oxidation, the colors are white and yellow;
Titanium alloy: Titanium alloy is anodized and can be made in various colors, such as blue, yellow, green, gold, etc.