Mechanisms of Adhesion Failure Between Polymers and Metallic Substrates. Part 2. Aluminum 2024-T3 and Titanium 6Al4V with HT424 Adhesive
Abstract
This report describes the continuation of a study of aluminum 2024-T3 alloy and titanium 6Al-4V alloy adherends, adhesively bonded with epoxy HT424 adhesive. The adherend surface properties, after standard preparation treatments, were characterized with a number of surface tools; Ellipsometry, surface potential difference (SPD), Auger electron spectroscopy (AES), electron, scanning electron and optical microscopy, contact angle, photo electron emission, and light scattering. A study was made of bond strengths after FPL etching and phosphoric acid anodizing and after aging of these surfaces in water vapor and in water. By calibrating the above mentioned instruments for hydroxide and organic films of known chemistry, it has been possible to discern the mechanism of aging degradation. The mechanisms of bond failure have been greatly ellucidated by a careful study of the data. Suggestions are given to improve bond strength and stability based upon the analysis.
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 01, 1975
- Accession Number
- ADA025256
Entities
People
- Tennyson Smith