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This study reports on the protection offered to steel and aluminum by selected formulations of fluidized-bed-applied vinyl, epoxy, polyester, ethylene-acrylic acid copolymer, and nylon powder coatings; solvent-borne vinyl, epoxy and chlorinated rubber coatings; ceramic coatings; hot-dipped and flame-sprayed zinc and aluminum coatings; and flame-sprayed 67-33 zinc-aluminum coatings. Most of the coatings fully protected the metals when exposed for ten years to a polluting industrial atmosphere. Some of the solvent-borne organic and flame-sprayed metallic coatings protected the metals during eleven years on a North Carolina ocean beach. Some of the flame-sprayed metallic coatings protected the metals during twelve years of Florida saltwater and mud exposure. The aluminum substrate panels retained their structural integrity whether exposed with or without coatings.
organic coatings, inorganic coatings, fluidized-bed-applied coatings, ceramic coatings, flame-sprayed aluminum and zinc coatings, hot-dipped aluminum and zinc (galva-nized) coatings, solvent-borne coatings, Resistance of coated steel and aluminum to an industrial atmosphere, to an ocean beach atmosphere, to seawater, to burial in salt sandy-mud
AT&T Bell Laboratories, Murray Hill, NJ