What Is an Anodized Finish?
Anodic oxidation, electrochemical oxidation of a metal or alloy. The process of forming an oxide film on aluminum products (anode) under the corresponding electrolyte and specific process conditions due to the applied current. Anodization, unless otherwise specified, usually refers to sulfuric acid anodization.
- The so-called anodization of aluminum is an electrolytic oxidation process. In this process, the surface of aluminum and aluminum alloy is usually converted into an oxide film, which has protective, decorative and other functional properties. From this definition, the anodic oxidation of aluminum includes only the part of the process of forming an anodic oxide film.
- Use of metal or alloy parts as
- Caused by anodes other than metals
- Protective
- Decorative
- Insulation
- Improve adhesion with organic coatings
- Improved adhesion to inorganic coatings
- Other features in development
- The difference between anodizing and conductive oxidation
- 1) Anodizing is carried out under high voltage. It is an electrochemical reaction process; conductive oxidation (also called chemical oxidation) does not need to be energized. It only needs to be immersed in a potion. A pure chemical reaction.
- 2) Anodizing takes a long time, often tens of minutes, while conductive oxidation only takes a few tens of seconds.
- 3) The film produced by anodization has several micrometers to several tens of micrometers, and is hard and wear-resistant; the film produced by conductive oxidation is only 0.01-0.15 micrometers, and the wear resistance is not very good, but it can conduct electricity and resist atmospheric corrosion. Is its advantage.
- 4) The oxide film is originally non-conductive, but because the film formed by conductive oxidation is really thin, it is conductive. [2]