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Improve bond strength for aluminum-to-metal or composite assemblies in demanding environments.
Get reliable adhesive bonding with phosphoric acid anodizing. Phosphoric acid anodizing is designed for adhesive bonding applications, especially where high humidity or harsh conditions are present. This process forms a porous oxide layer with micro-protrusions (“whiskers”) that enhance mechanical bonding between aluminum and adhesives.
It outperforms chromic and sulfuric acid coatings in bond strength and consistency, making it essential in aerospace, composites, and structural assembly requiring long-term durability and predictable adhesion.
Phosphoric acid anodizing is primarily used for bonding applications where environments contain high humidity. Durable adhesive bonds between metal to metal, metal to composites can be obtained reliably only through proper selection and careful control of the materials used and the steps in the bonding process.
This coating has superior durability as compared to coatings of chromic or sulfuric acid, this is due to the film’s pores where whiskers or protrusions increases the bonding effectiveness. These properties allow for bonding of metallic and composite parts as well as pre-bond primer applications.
This as well as other anodic coatings provide predictable performance, replicated and repeatable applications, and consistent test results.
Our team will work with you to determine the best solution for your specific parts and application.