EFFECT OF SURFACE PREPARATION AND ELEVATED TEMPERATURE STORAGE ON ADHESIVE BONDS TO ALUMINUM.
Abstract
Two room-temperature-curing epoxy-type adhesives were used to bond aluminum to aluminum. Two chemical methods of treating aluminum were used. The effects of variations in test temperature, MIL-STD-304 conditioning, and elevated and room temperature storage for 1 year were evaluated. In all of the cases investigated, elevated temperature storage had no detrimental effect after one year. However, there was in all cases a decrease in tensile strength during the initial stages of heat storage and no substantial increase was noticed until after 6 months. The choice of surface treatment, which is dependent upon the adhesive selected, can result in a difference in bond strengths. In the case of the novolac-based epoxy, there was a substantial difference between the tensile strengths obtained using the two treatment methods. The liquid hydrochloric acid treatment was superior to the commercial paste treatment. In the case of the polyamide-epoxy, the results obtained were substantially the same regardless of the method selected. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- May 01, 1964
- Accession Number
- AD0600033
Entities
People
- Raymond F. Wegman
Organizations
- Picatinny Arsenal