Effects of Environmental Exposure on Strength Properties of AF-A-3639 Adhesive Bonded Joints

摘要

A new adhesive, AF-A-3639, (Hysol's ADX- 639), a 420 F capability tough adhesive, is characterized for its durability when exposed to hostile environments such as, heat aging plus salt spray, humid aging, humid aging and elevated temperature cycling, and fatigue. Specimens used in the evaluation are aluminum-to-aluminum and titanium-to-titanium. The adhesive exhibits excellent retention of initial strength after all the tests except for those at 420 F with titanium specimens. However, these lower strength levels are attributed to the cold phosphate etch used as a pretreatment for the titanium adherends. (Author-PL)