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

1975-09-02

1976-07-27

Kaplan, G. L.

Metal working

Method of mechanical manufacture

Assembling or joining

29195, 204 35R, 204 38C, 427309, 427330, 427405, 427419, B23P 302, C25D 536, C25D 548, C23D 300

Patent

active

039711200

ABSTRACT:
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 onto a surface of the carbon-rich iron workpiece. Thereafter, the workpiece and bonded iron layer are placed in an electroconducting 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 prevent 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.

REFERENCES:
patent: 2351811 (1944-06-01), Frank
patent: 2639264 (1953-05-01), Chester
patent: 3773629 (1973-11-01), Sieckmann et al.
patent: 3923611 (1975-12-01), Ruderer

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