Development of a Primer/Topc
Abstract
Two corrosion preventive organic coatings have been developed for use on aluminum and specifically for application on Navy aircraft. They provide two alternatives for improving aircraft paint systems. The first coating can be applied directly to an aluminum substrate and perform as a self-priming topcoat. It consists of a two component, aliphatic polyurethane binder with titanium dioxide, zinc molybdate, zinc phosphate, an organo-zinc salt, and titanium dioxide vesiculated bead pigments. This primer/topcoat meets or exceeds all of the critical performance requirements of the current Navy aircraft paint system. Mil-P-23377 epoxy primer and Mil-C-83286 polyurethane topcoat. It exhibits good adhesion, corrosion inhibition, flexibility, chemical and weather resistance. The use of this coating will reduce: Paint application and removal time and manpower; Aircraft weight; Aircraft downtime; and Volatile organic component (VOC) and chromate emissions. The second coating is a flexible primer which was developed using the above polyurethane binder. It contains strontium chromate zinc chromate, barium chromate, and zinc molybdate corrosion inhibiting pigments. The primer meets or exceeds all of the performance requirements of Mil-P-23377 and has significantly more flexibility. Aluminum specimens coated with the NADC flexible primer remained in 5% salt spray for one year without any corrosion of the aluminum or damage to the coating.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 20, 1987
- Accession Number
- ADA182132
Entities
People
- Charles R. Hegedus
Organizations
- Naval Air Warfare Center Warminster