New Approaches for Sealing Anodic Coatings

摘要

Aluminum substrate can be sealed with sol-gel coating after anodic oxidation in sulfuric acid. Corrosion resistance against atmospheric corrosion is comparable with hydrothermal sealing and even higher. The disadvantage of this process is its high price and decreased abrasion resistance and hardness. In spite of this, for special purposes this type of sealing is acceptable.