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Study Shows that Prepainted Cut Edges
Exhibit Good Corrosion Resistance

Study Shows that Prepainted Cut Edges
Exhibit Good Corrosion Resistance

Friday, July 15, 2005
 
There’s no need to fear the use of prepainted metal parts when there is an exposed cut edge in the design. A recent test performed by the National Coil Coating Association (NCCA), Cleveland, OH, shows that prepainted parts with exposed cut edges performed better, in terms of corrosion resistance, than did post-painted parts. NCCA, with PPG Industries and the North American Zinc-Aluminum Coaters Association, worked together to compare the corrosion resistance of prepainted metal louvers on air-conditioning units with three types of post-paint—electrocoat, powder finish and spray finish. Testers believe that prepainted parts perform well in corrosion testing because the sheet is uniformly cleaned, pretreated and painted, in two coats versus one, as a flat surface, so the edge-to-edge and side-to-side variability is virtually eliminated. Learn more at www.coilcoatinginstitute.org.

 

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