Manufacturing capability
Anodizing
Anodizing is an electrochemical surface treatment that increases the thickness of the natural oxide layer on aluminum and selected other metals. It is commonly used to improve corrosion resistance, surface durability, and appearance while providing controlled finishing options for precision machined and fabricated components.
Related process: Surface Treatment
Manufacturing overview
Anodizing creates an oxide layer through a controlled electrochemical process. Unlike paint or conventional plating, the resulting oxide is formed from the substrate itself.
The process is widely used for aluminum components requiring corrosion protection, decorative finishes, improved wear characteristics, or electrical insulation.
Common anodizing categories include:
- Type II anodizing: Conventional sulfuric acid anodizing used for corrosion resistance and decorative finishes, including selected dyed colors.
- Type III hard anodizing: Produces thicker, harder oxide coatings commonly used for wear-resistant industrial components.
- Architectural anodizing: Applied to aluminum products requiring controlled appearance and outdoor durability under relevant specifications.
Typical applications include precision machined housings, electronic enclosures, aerospace components, automation equipment, industrial panels, and consumer hardware.
Anodizing results depend on aluminum alloy composition, temper, surface preparation, coating thickness, and process parameters. Different alloys may exhibit variations in color and surface appearance.
Surface preparation may include degreasing, etching, polishing, or bead blasting. These operations influence the final texture and visual consistency.
Dimensional effects must be considered for precision parts. Anodic oxide grows partly into the original surface and partly outward, so coating thickness can affect bores, threads, fits, and other controlled dimensions.
Buyers should specify the aluminum alloy, applicable anodizing standard, coating type, target thickness, color, sealing requirements, cosmetic expectations, and any masked surfaces.
Relevant specifications may include ISO 7599, ISO 10074, or MIL-PRF-8625, depending on the application and required coating type.
Inspection requirements may include coating thickness measurement, visual assessment, sealing verification, corrosion testing, and wear-related evaluation where specified.
Metraxio supports anodizing RFQs that connect surface treatment requirements with component material, dimensional tolerances, and final inspection expectations.