Durable adhesive bonding underwater to cathodically protected systems.

摘要

A sealant for under water adhesive bonds comprises a sealant with minimum susceptibility to alkaline hydrolysis capable of curing underwater and composed substantially of a hydrocarbon backbone material, preferably a polyurethane with a minimum of hydrolysable groups. Also, a method is provided for making adhesive bonds between members of a cathodically protected system comprising the steps of applying an adhesive to form a bonded area between said members, applying a layer of sacrificial pre-treatment material over the bonded area by simultaneous abrasion and application of the material, and then applying the sealant. The sealant displaces or absorbs the sacrificial pre-treatment material.