TROPICAL EXPOSURE OF FINISHING SYSTEMS FOR FERROUS METALS.
Abstract
The report covers a study on the corrosion protection afforded to ferrous metal under tropical exposure conditions by 28 paint systems covered by Military Standard 171 Finishing of Wood and Metal Surfaces. Also included were 4 systems using an experimental epoxy primer and one with an experimental thermoset acrylic top coat. The coatings were applied over solvent cleaned stell, as well as metal pretreatments conforming to Types I, II, and III of Federal Specification TT-C-490 Cleaning Methods and Pretreatment of Ferrous Surfaces for Organic Coatings. Test specimens were exposed in the Panama Canal Zone at breakwater, open field and rain forest sites. Another set was exposed concurrently at Aberdeen Proving Gound. After 21 months exposure test data showed zinc phosphate conforming to TT-C-490 Type I to be the most effective pretreatment and that with the exception of control of corrosion in scribed areas at seacoast sites, many of the current finishing systems will provide a high degree of corrosion protection under various types of climatic exposure. The exact duration of this protection remains to be determined by additional long term exposure of the more effective systems. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 01, 1966
- Accession Number
- AD0634156
Entities
People
- Melvin H. Sandler