Evaluation of Coating Systems for Nonferrous Metal Surfaces.
CONSTRUCTION ENGINEERING RESEARCH LAB (ARMY) CHAMPAIGN IL
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Both aluminum and galvanized steel are used on many Corps of Engineers projects. Civil Works Guide Specification CWGS-09940 specifies coatings for the protection of these nonferrous metal surfaces in various applications, but some of these coatings are no longer in compliance with current or anticipated government restrictions on volatile organic compound VOC content. The U.S. Army Construction Engineering Research Laboratories USACERL was tasked to study select coating systems and identified alternative materials that can meet CWGS-09940 performance specifications while conforming to regulatory VOC content levels. Alternatives were to be sought from commercially available products or existing Federal Specification paints in order to conform with current Federal acquisition reform initiatives. The performance of selected test and control coatings was evaluated on aluminum and galvanized steel surfaces in laboratory tests including fresh water immersion and accelerated cyclic corrosion exposures. Exposed test panels were evaluated for adhesion, blistering, delamination, undercutting at the scribe, and corrosion. The research identified several suitable commercially available alternative coatings for nonferrous metal surfaces used in various environmental exposures. Based on the results of this study, revisions of CWGS-09940 are recommended.
- Organic Chemistry
- Coatings, Colorants and Finishes
- Metallurgy and Metallography