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AssigneeMoltech Invent S.A.
InventorsJainagesh A. Sekhar, Vittorio de Nora
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A body of carbonaceous or other material for use in corrosive environments such as oxidizing media or gaseous or liquid corrosive agents at elevated temperatures, in particular in molten salts such as cryolite, is coated with a protective surface coating which improves the resistance of the body to oxidation or corrosion and which may also enhance the bodies electrical conductivity and/or its electrochemical activity. The protective coating is applied in one or more layers from a colloidal slurry containing reactant or non-reactant substances, or a mixture of reactant and non-reactant substances, in particular mixtures containing silicon carbide and molybdenum silicide or silicon carbide and silicon nitride, which when the body is heated to a sufficient elevated temperature reaction sinter as a result of micropyretic reaction and/or sinter without reaction to form the protective coating.
A body of carbonaceous material for use in corrosive environments such as oxidising media or gaseous or liquid corrosive agents at elevated temperatures, coated with a non-glassy protective surface coating which improves the resistance of the body to oxidation or corrosion and which may also enhance the body's electrical conductivity and/or its electrochemical activity, the protective coating being applied from a colloidal slurry containing particulate reactant or non-reactant, said slurry forming said non-glassy protective coating by reaction sintering and/or sintering without reaction when the body is heated to a sufficiently elevated temperature.
A body of carbonaceous or other material for use in corrosive environments such as oxidizing media or gaseous or liquid corrosive agents at elevated temperatures, coated with a non-glassy coating which improves the resistance of the body to oxidation or corrosion and which may also enhance the body's electrical conductivity and/or its electrochemical activity, in which the protective coating is applied from a colloidal slurry containing particulate reactant or non-reactant substances, or a mixture of particulate reactant and non-reactant substances, said slurry forming said non-glassy protective coating by reaction sintering and/or sintering without reaction when the body is heated to a sufficiently elevated temperature, wherein the non-reactant substances comprise antioxidant or oxidation prevention materials such as boric acid and its salts, and fluorides;
A body of carbonaceous or other material for use in corrosive environments such as oxidizing media or gaseous or liquid corrosive agents at elevated temperatures, coated with a non-glassy protective surface coating which improves the resistance of the body to oxidation or corrosion and which may also enhance the bodies electrical conductivity and/or its electrochemical activity, in which the protective coating is applied from a colloidal slurry containing particulate non-reactant substances, or a mixture of particulate reactant and nonreactant substances, in which the non-reactant substances are particulates with a particle size below 100 microns, said slurry forming said non-glassy protective coating by sintering without reaction when the body is heated to a sufficiently elevated temperature.
Dependencies are inferred from the claim text.