Anodizing is an electrolytic passivation process used to increase the thickness of the natural oxide layer on the surface of metal parts. The process is called "anodizing" because the part to be treated forms the anode electrode of an electrical circuit. Anodizing increases corrosion resistance and wear resistance, and provides better adhesion for paint primers and glues than does bare metal. Anodic films can also be used for a number of cosmetic effects. Anodizing is also used to prevent galling of threaded components and to make dielectric films for electrolytic capacitors. Anodizing thickness increases wear resistance, corrosion resistance, ability to retain lubricants and PTFE coatings, and electrical and thermal insulation.
Anodized aluminum products are used in thousands of commercial, industrial and consumer applications, limited only to the imagination of designers and engineers. Some of those industries include:
- Aviation and Aerospace
- Buildings and Architecture
- Food Manufacturers/Preparation Equipment
- General Manufacturing
- Military/Law Enforcement
- Sporting Goods