How to anodizing aluminum tile trim

Core Steps for Anodizing Aluminum Tile Trim

The aluminum tile trim anodizing procedure consists of four essential steps that result in exceptional finish quality:

• Pre-Preparation and Cleaning: Before anodizing begins the aluminum tile trim requires complete cleaning for removing oils and contaminants and residues. Degreasers and alkaline cleaners should precede etching with sodium hydroxide to produce a smooth surface. The acid desmutting process cleans out every remaining contamination from the surface. The proper formation of oxide requires this fundamental step.
• Key Reactions in the Electrolyte: Submerge the cleaned trim in a sulfuric acid bath. The direct current must be applied through the anode with the trim as its contact point. The reaction between oxygen ions and aluminum material produces a porous oxide layer through their interaction. The desired thickness range for tile trim is achieved by managing temperature and current density during the process which results in 5-25 microns of thickness.
• Dyeing (Optional): The porous layer undergoes color application through immersion in dye baths to achieve different finishes. The addition of organic dyes and electrolytic coloring techniques produces black, gold and bronze shades for the trim to match tile aesthetics.
• Sealing: The pores receive closure through boiling water treatment or nickel acetate solution application. The sealing process enhances color retention while delivering superior stain and corrosion protection.