The TNT Staining Problem on the M795 Coating System
Abstract
The polyurethane coating used on the M795 to provide chemical agent resistance is stained when it comes into contact with TNT (2,4,6,Trinitrotoluene), which is loaded into the steel projectiles after fabrication and painting. This project was performed to evaluate the alternatives available to repair the stained areas and included overcoating with the standard military specification finish for ammunition and ammunition components (a fast drying alkyd enamel), overcoating with the original paint, and overcoating with a fast-curing version of the original paint. Although adhesion and corrosion resistance were acceptable for all three, none was a solution to the problem. The TNT stain permeated a cured polyurethane topcoat in moderate heat. The alkyd was incompatible with TNT-stained areas in the original polyurethane, and this led to serious surface appearance problems. The satisfactory repair of stained projectiles will probably require some stripping and refinishing.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 01, 2000
- Accession Number
- ADA384553
Entities
People
- Jeffrey L. Duncan
- Pauline Smith
Organizations
- United States Army Research Laboratory