Patent ID: 6737175
Filing Date: 2004-05-18
Classification: B01J,C10G,C22C,C23C,Y10S,Y10T

Abstract:
An apparatus having surfaces which are exposed to carbon supersaturated environments during operation having a coating thereon resistant to metal dusting environments wherein said coating is a composition resistant to metal dusting when exposed to a carbon super-saturated environment at temperatures up to about 650Â° C. comprising an alloy selected from the group consisting of copper-tin alloys, copper-gallium alloys copper-aluminum alloys, and mixtures thereof, wherein when said alloy is a copper-tin alloy, the amount of tin will range from about 0.1 to about 2 wt % when exposed to carbon supersaturated environments at temperatures of about 500 to about 650Â° C., about 0.1 to about 5 wt % when exposed to carbon supersaturated environments at temperatures of about 400 to about 500Â° C., and about 0.1 to about 8 wt % when exposed to carbon supersaturated environments at temperatures up to about 400Â° C., and wherein when said alloy is a copper-gallium alloy, the amount of gallium will range from about 0.1 to about 2 wt % when exposed to carbon supersaturated environments at temperatures of about 500 up to about 650Â° C., and from about 0.1 to about 5 wt % for temperatures up to about 500Â° C., and wherein when said alloy is an copper-aluminum alloy, the amount of aluminum will range from about 0.1 to about 4 wt % when exposed to carbon supersaturated environments at temperatures of about 500 to about 650Â° C., about 0.1 to about 8 wt % when exposed to carbon supersaturated environments at temperatures up to about 500Â° C. and wherein when said mixture is a copper-tin-gallium alloy, the amount of tin and gallium combined will be about 0.1 to about 5 wt % when exposed to carbon supersaturated environments at temperatures up to about 500Â° C. and about 0.1 to about 2 wt % when exposed to carbon supersaturated environments at temperatures of about 500 to about 650Â° C. and wherein when said mixture is a copper-tin-aluminum alloy, the amount of aluminum will be about 0.1 to about 8 wt % and the amount of tin will be about 0.1 to about 5 wt % when exposed to carbon supersaturated environments at temperatures up to about 500Â° C. and the amount of aluminum will be about 0.1 to about 4 Wt % and the amount of tin will be about 0.1 to about 2 wt % when exposed to carbon supersaturated environments at temperatures of about 500 to about 650Â° C. and wherein when said mixture is a copper-gallium-aluminum alloy the amount of gallium will be about 0.1 to about 5 wt % and the amount of aluminum will be about 0.1 to about 8 wt % when exposed to carbon supersaturated environments at temperatures up to about 500Â° C. and the amount of gallium will be about 0.1 to about 2 wt % and the amount of aluminum will be about 0.1 to about 4 wt % when exposed to carbon supersaturated environments at temperatures of about 500 to about 650Â° C., and wherein when said mixture is a copper-tin-gallium-aluminum alloy, said alloy will contain about 0.1 to about 5 wt % of gallium and tin combined and about 0.1 to about 8 wt % aluminum when exposed to carbon supersaturated environments at temperatures up to about 500Â° C. and about 0.1 to about 2 wt % of gallium and tin combined and about 0.1 to about 4 wt % aluminum when exposed to carbon supersaturated environments of between about 500 and about 650Â° C.