Direct-on ceramic coating of carbon-rich iron

Details Direct-on ceramic coating of carbon-rich iron Direct-on ceramic coating of carbon-rich iron

C - Chemistry, Metallurgy

25

D

204/21, 204/83

C25D 5/26 (2006.01) B23K 20/227 (2006.01) C23D 3/00 (2006.01) C25D 3/20 (2006.01) C25D 5/12 (2006.01) C25D 5/18 (2006.01) C25F 3/06 (2006.01)

Patent

CA 1051371

Abstract of the Disclosure A process is disclosed for preparing an iron workpiece containing at least 0.03%, by weight carbon for a direct-on, one-fire ceramic or enamel coat. A substantially continuous-layer of substantially pure iron is pressure- bonded or electrodeposited onto a surface of the carbon-rich iron workpiece. Thereafter, the workpiece and bonded iron layer are placed in an electro- conducting liquid medium and, while using the workpiece as an anode, some of the deposited iron is electrolytically removed to produce an exposed, fissured, textured surface in the pure iron layer. When a ceramic coat is conventionally applied over the fissured surface, it adheres well, even though the iron workpiece may contain appreciable amounts of carbon which normally present such adherence for a direct-on ceramic coat. Optionally, the pressure-bonded layer may be followed by an electrodeposit of a porous, substantially pure iron layer prior to applying a ceramic coat.

240795

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