SURFACE TREATMENT FOR STRUCTURAL BONDING TO ALUMINUM Russian patent published in 2018 - IPC C09J5/02 C23C18/12 C23C18/04 C23C28/00 B64F5/00 

FIELD: metallurgy.

SUBSTANCE: group of inventions relates to a method for structurally bonding adhesives to aluminum components without using adhesive bond primers and to an apparatus that include these structural bonds. Aluminum component may be treated with a conversion coating creating a conversion layer on the surface of the aluminum component, and then treated with a sol-gel material creating a sol-gel layer on the conversion layer. Adhesive layer is applied directly onto the sol-gel layer without any adhesive bond primers. After curing the adhesive layer, a structural bond is formed between the aluminum component and the adhesive layer. Sol-gel material may be specifically formulated for a specific adhesive type and may include functional groups providing covalent bonds to the adhesive layer. Sol-gel material may be cured within about 30 minutes at a room temperature in comparison to 90 minutes at 250F (121°C) needed to cure a typical adhesive bond primer.

EFFECT: technical result achieved by using the group of inventions is increasingly bonding adhesives to aluminum components without using adhesive bond primers, especially under field conditions.

14 cl, 6 dwg