Evaluation of the Adhesive Bonding Processes Used in Helicopter Manufacture. Part 7. Preproduction Evaluation of Improved Titanium Surfaces Preparation.

摘要

The PHOSPHATE-FLUORIDE TREATMENT (STABILIZED) has been compared directly to a standard Phosphate-Fluoride Treatment for the surface preparation of commercially pure titanium sheet. The stabilized treatment process was found to provide an improvement in the durability of adhesive bonded joints exposed to moisture and stress. The treatment processes were compared for their effect on the properties of the basis metal as well as for bondability and durability. Laboratory evaluations included standard specification qualification testing as well as special durability tests. (Author)