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 |
Mid-temperature, nickel acetate liquid sealant. Easy to use and maintain. Improves corrosion protection. Smut protection. Self regulating pH. Non-yellowing formulation. Also suitable for electrolytically colored work. Meets Mil-A-8625. Compatible with all aluminum dyes. |
| Specialty Sealant |
High temperature, nickel acetate powdered sealant. Improves corrosion protection. Compatible with all aluminum dyes. Self-regulating pH. Smut protection. Meets Mil-A-8625. |
| Nickel Acetate |
High purity for self-blended formulations. |
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Sealant Additive |
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| Specialty Dispersant | Smut retardant for boiling water or self-made nickel acetate solutions. |
