Cookware coating system

An article of cookware comprising a metal substrate coated with a scratch-resistant, non-stick coating system wherein said coating system comprises a primer applied to a metal substrate, a midcoat adhered to said primer and a topcoat adhered to said midcoat,

• said primer comprising about 15 to 35 percent by weight calcined aluminum oxide in the form of particles with an average diameter under 20 microns, about 35 to 70 percent by weight perfluorocarbon polymer comprising 50 to 70 percent by weight polytetrafluoroethylene and 50 to 30 percent by weight copolymer selected from fluorinated ethylene-propylene and perfluoroalkyl vinyl ether copolymer with tetrafluoroethylene, and about 15 to 30 weight percent auxillary heat stable polymer selected from polyamide-imide, polyphenylene sulfide and polyether sulfone,
• said midcoat comprising about 10 to 20 percent by weight of such aluminum oxide, 90 to 80 percent by weight of such perfluorocarbon polymer but in a ratio in the range of 80 to 90 percent by weight polytetrafluoroethylene and 20 to 10 percent by weight of such copolymer, and
• said topcoat comprises polytetrafluoroethylene.