Loading patent…
AssigneeGeneral Electric Company
InventorGeorge A. Coffinberry
Estimating the term…
Articles for hot hydrocarbon fluid wherein the surface for contacting the fluid is a diffusion barrier material or a catalytic material coated on a metal substrate. The material is either catalytically-inactive tantalum oxide which inhibits the formation of coke in the fluid or catalytically-active zirconium oxide which promotes the formation of a loosely adherent coke in the fluid while inhibiting the formation of gum in the fluid. The coating materials, i.e., the diffusion barrier coating material and the catalytic coating material, are deposited by chemical vapor deposition (CVD), e.g., by effusive chemical vapor deposition of an organometallic compound on the surface without the use of carrier gas, without pre-oxidation of the surface and without thermal decomposition of the diffusion barrier material or the catalytic coating material. The articles having the coated surfaces find utility in components subjected to high temperatures wherein the components are in contact with hydrocarbon fluids without additives, without special attention to quality control and without the need for special processing.
A method for preventing the deposit on a metal surface of hydrocarbon degradation products derived from sulfur- or oxygen-containing hydrocarbon fluid, the method comprising the steps of processing the metal surface to be clean and oxide-free, and then applying to the clean and oxide-free metal surface a coating comprising a catalytic, smooth, continuous, non-porous, and thermally stable layer of zirconium oxide which inhibits formation of gum on a surface thereof, the layer of zirconium oxide being deposited by chemical vapor deposition from an organometallic precursor vapor without use of a carrier gas.
A container article for hydrocarbon fluids having iron-, nickel-, or chromium-containing metal walls and a smooth, non-porous, continuous, thermally stable, and gum-inhibiting coating comprising a catalytic layer of zirconium oxide between the walls and the hydrocarbon fluid, the layer of zirconium oxide being deposited by chemical vapor deposition from an organometallic precursor vapor without use of a carrier gas such that the layer of zirconium oxide is smooth, non-porous, continuous and thermally-stable and inhibits gum deposits.
Dependencies are inferred from the claim text.