Sealing Oxide Coatings
The aluminum oxide formed during the anodizing is absorbent due to its high porosity and chemical composition. Therefore the anodic oxide coating is often sealed after being anodizing to provide greater corrosion resistance. Anodized parts that are subsequently dyed, sealing of the coating enhances the lightfast properties of the colored oxide.
The sealing process consists of immersing the anodized aluminum in a boiling water bath or a nickel acetate solution, which is more widely used. The pores in the anodic coating are closed or plugged and the coating becomes resistant to further staining. This closing of the pores substantially increases the corrosion resistance of the anodic oxide coating.
| Sealants | |
| Specialty Sealant MTL |
Our top selling, mid-temperature sealant. High quality seal that does not affect dyes. Improves corrosion resistance of clear anodize. Suitable for electrolytically colored aluminum. Non-yellowing formulation. Virtual absence of smut. Easy to operate and maintain. No buffer needed, self regulation pH. Meets MIL-A-8625 Meets ASTM B117 Meets ASTM B136 |
| Specialty Sealant | 205°F nickel acetate powder with smut retardant and pH regulator. |
| Nickel Acetate | High quality material for self-made solutions. |
| Sealant Additive | |
| Specialty Dispersant | Smut retardant for boiling water or self-made nickel acetate solutions. |
