The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 27, 1976
Filed:
Sep. 02, 1975
Clifford G Ruderer, Brecksville, OH (US);
Ferro Corporation, Cleveland, OH (US);
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.