Carbonaceous articles having oxidation prohibitive coatings thereon
 A carbonaceous article, e.g., a carbon or graphite electrode, is provided with an oxidation prohibitive coating comprising a compliant, low strength, porous, sintered, particulate, refractory, ceramic material. A cover layer is preferably applied over this compliant, low strength, ceramic layer, the cover layer comprising a rigid, glassy substance which is plastic and flowable at temperatures above about 750.degree. C. 
Union Carbide Corporation
Y C C C C C H C C
Y10T C04B C04B C04B C04B C04B H05B C04B C04B
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Raymond V.
Sara