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97218 MICROFUNGAL DEGRADATION OF POLYURETHANE PAINT AND CORROSION OF ALUMINUM ALLOY IN MILITARY HELICOPTERS.

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Product Number: 51300-97218-SG
ISBN: 97218 1997 CP
Author: Dennis M. Lavoie, Brenda J. Litfle, Richard I. Ray, Kevin R. Hart, and Patricia A. Wagner
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Military helicopters operating in humid environments often develop growths of micro furrgi on interior anrfacea. Fungal contamination requires labor for cleaning maintenance, and also has the potential to influence corrosion of airframes dkctly via fungal metabolism or induectly via unauthorized clearring procedures. Nine genera of microfungi were isolated from the interiors of military helicopters. One of the isolates is known to discolor paint, and another reportedly causes corrosion in aluminum alloy. In a study to determine the short-term effect of fungal growth on paints used on military helicopters, coupons painted with polyester polyurethane and lacquer-based coating were exposed to fungal isolates. Both coated and uncoated surfaces were examined for physical changes due to presence and activities of fungi. Polyester polyurethane paint exhibited better short term resistance to initiation of overgrowth and surface damage by fungi than lacquer-based paint. Keywords: biodeteriation, polyester, polyurethane, lacquer, fungi, mildew
Military helicopters operating in humid environments often develop growths of micro furrgi on interior anrfacea. Fungal contamination requires labor for cleaning maintenance, and also has the potential to influence corrosion of airframes dkctly via fungal metabolism or induectly via unauthorized clearring procedures. Nine genera of microfungi were isolated from the interiors of military helicopters. One of the isolates is known to discolor paint, and another reportedly causes corrosion in aluminum alloy. In a study to determine the short-term effect of fungal growth on paints used on military helicopters, coupons painted with polyester polyurethane and lacquer-based coating were exposed to fungal isolates. Both coated and uncoated surfaces were examined for physical changes due to presence and activities of fungi. Polyester polyurethane paint exhibited better short term resistance to initiation of overgrowth and surface damage by fungi than lacquer-based paint. Keywords: biodeteriation, polyester, polyurethane, lacquer, fungi, mildew
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