Abstract:
An improved multilayer coating for use on molten metal holding and transfer apparatus, the coating including a bond layer applied directly to the surface of molten metal holding and transfer apparatus, and a porous layer of ceramic material produced by co-deposition of a powder of said ceramic material and a powder of a suitable organic polymer material and, after the co-deposition, heating of said polymer material to thermally decompose the polymer material and form the porous layer. The bond layer preferably is formed of a metallic, intermetallic or composite particulate materials. The metal component may be in the metallic, intermetallic, oxide, clad or alloyed form consisting of any one or more of the metal components selected from the group of Mo, Ni, Al, Cr, Co, Y and W and may be in combination with yttria, alumina, zirconia, boron, carbon and have a particle size in the range of 5 to 250 m, typically 40 to 125 m. The bond layer preferably has a thickness of 5 to 300 m with a substantially uniform coating layer being provided over the surfaces to have the porous ceramic coat applied.
Abstract:
A die or mould coating comprising: a bond layer and a porous layer of ceramic material produced by co-deposition and heating of said ceramic material and a powder of an organic thermosetting polymer material; and an upper sealer coating comprising metal or ceramic filler particles dispersed in a carrier.
Abstract:
A coating system, for use in reducing air burn oxidation of a carbon anode of an aluminium electrolytic smelter, includes a pre-coat and a top coat which together enable protection of the anode when applied thereover. The pre-coat contains finely divided carbonaceous material dispersed in a solution of a suitable binder. The top coat contains finely divided particulate material, comprising at least one of alumina and cryolite, dispersed in a solution of a suitable binder.
Abstract:
A method of protecting a polymer surface against fouling, which method comprises embedding in the polymer surface particles having antifouling properties, wherein, the particles are embedded in the polymer surface by a spray mechanism in which the particles are accelerated and sprayed onto the polymer surface with a suitable velocity such that the particles become embedded in the polymer surface, wherein the particles are embedded in the polymer surface without an adhesive or binder and wherein the particles do not form a continuous layer on the polymer surface.
Abstract:
This invention relates to a method of forming seamless titanium and/or titanium alloy pipe. The invention also relates to a pipe formed by the method and a substrate on which the pipe is formed. The method involves providing a substrate on which to form pipe, spraying titanium or titanium alloy particles on to the substrate to cause the particles to bond together and to begin forming a pipe. The method further involves moving formed pipe relative to the substrate while continuing to spray particles so that further pipe is formed continuously and integrally with the formed pipe.
Abstract:
The present invention relates to a method of manufacturing a pipe, which method comprises cold-gas dynamic spraying of particles onto a suitable support member thereby producing a pipe, and separating the pipe from the support member.