Primerless Finishing Systems for the Corrosion Protection of Aluminum.
Abstract
A trend to develop primerless systems for military equipment has begun in which a topcoat can be applied directly to surface treated aluminum. Two approaches to obtain a primerless system are currently available and were investigated. In the first approach, a standard sulfuric acid anodized surface was sealed with a polyurethane colloidal suspension. The resulting pretreatment can be directly topcoated. The second approach involved the application of a primerless or self-priming topcoat applied directly to a surface pretreatment. Adhesion, electrochemical impedance spectroscopy, flexibility and corrosion resistance tests were performed on several aluminum substrates to determine the physical properties of the coating-pretreatment systems. The results of this analysis indicate that these primerless systems show promise and should be considered for specific finishing system applications. Keywords: Primerless coating systems; Organic coatings; Corrosion protection; Inorganic pretreatments; Coatings; Primers; Finishes. (kt)
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 19, 1988
- Accession Number
- ADA206893
Entities
People
- Anthony T. Eng
- Charles R. Hegedus
- Donald J. Hirst
- Stephen J. Spadafora
Organizations
- Naval Air Warfare Center Warminster