Alexandria Finishing
Automated Anodizing
Alexandria Finishing is a supplier of anodized aluminum extrusions designed for a variety of markets in search of automated chemical finishing processes and capabilities of producing consistent finish quality.
Benefits Of Anodizing
Our anodizing equipment and processes will greatly improve the overall appearance of your aluminum extruded components gaining the advantages of:
Corrosion resistance
Abrasion resistance
Wear resistance
Enhanced heat dissipation
Increased lubricity
Dielectric strength
Color stability
Ease of maintenance
Aesthetics and appearance
Anodizing Process
Anodizing is an electro-chemical process that forms a durable, porous oxide film on the surface of the aluminum extrusions, adding to the protection provided by its natural oxide layer. Anodizing is a process in which the aluminum extruded profile is immersed in a tank containing an acid-based electrolyte; a current is passed through the solution, carefully controlling the temperature of the electrolyte. The aluminum extruded profile serves as the anode, so the electrolyte releases oxygen ions at the surface of the profile. The oxygen immediately combines with the surface aluminum to form a hard aluminum oxide film.
Types Of Anodizing
Sulfuric (the most common process) produces comparatively thick, transparent and absorptive oxide films, suitable for receiving both organic and inorganic dyes and metal oxides for electrolytic color.
Hardcoating produces a much thicker film. Functional hardcoating, or hard anodizing, is a modification of sulfuric anodizing, performed at high current densities and low temperatures. Sometimes additives are mixed into the electrolyte to produce a denser, more abrasion-resistant oxide film, imparting high wear resistance to the product.
Colors of Anodizing Available
Black
Clear
Blue
Red*
Gold*
Purple*
Pewter*
Grey*
Green*
*Supplier Base