Nonchrome Final Rinse Study
Rept. for Apr 1989-Dec 1991
ARMY ARMAMENT RESEARCH DEVELOPMENT AND ENGINEERING CENTER PICATINNY ARSENAL NJ HEAVY ARMAMENT DIV
Pagination or Media Count:
This report covers the evaluation of nonchrome final rinse products for the zinc phosphating process. It consists of four phases and was performed under the Environmentally Acceptable Materials, Treatments, and Processes Program, Manufacturing Technology Program. The zinc phosphate coating is generally used as a pretreatment of ferrous surfaces to improve the corrosion resistance and adhesion of organic coatings. The final rinse is used as a post treatment to improve the phosphate coating performance. Under this study, the performance of various nonchrome products was evaluated and compared with chrome final rinse products. The various nonchrome products were tested from the standpoint of meeting the current surface finishing performance requirements for ammunition items. The corrosion resistance tests were conducted with test panels and actual production parts coated with army protective finishing systems. The results of this study demonstrated two acceptable nonchrome products. The nonchrome rinse product was successfully proved out in the actual production environment and implemented at the Scranton Army Ammunition Plant. Therefore, it is concluded that the nonchrome final rinse is a viable, environmentally acceptable product for the zinc phosphating process.
- Inorganic Chemistry
- Coatings, Colorants and Finishes
- Properties of Metals and Alloys