Adsorption of Phosphorus Acids on Alumina.
Abstract
Penetration of moisture into adhesively bonded aluminum structures can and often does lead to deterioration and ultimate failure of the bonds. Methods of retarding moisture penetration into these systems are therefore desirable. One successful method consists of treating the oxidized aluminum (alumina) surface with an hydration inhibitor prior to application of the adhesive. In a comprehensive study of the use of hydration inhibitors to improve the durability of aluminum joints, Davis et al. found that alumina surfaces treated with certain amino phosphonates exhibited a much higher resistance to hydration than untreated surfaces. There it was proposed that phosphonic acids absorb on alumina by a condensation reaction involving hydroxyl groups of the acid and those on alumina, resulting in the formation of P-O-Al bonds. Keywords: Adhesive bonding; Adhesion, Adsorption, Alumina, Chemisorption, Hydration inhibition, IETS, Phosphorus acids, Surface condensation, Spectroscopy. (KT)
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 01, 1988
- Accession Number
- ADA200548
Entities
People
- Alan Neville Gent
- P. N. Henriksen
- R. D. Ramsier
Organizations
- University of Akron