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US 4,950,365 AGranted
Corrosion free hard coated metal substrates
AssigneeVac-Tec Systems, Inc.
InventorJoseph D. Evans
Life of this patent
Estimating the term…
Abstract
A process for making an article comprising a substrate, a first coating on the surface of said substrate of a thin, hard coated metal compound, and a second coating on the surface of said first coat of a thin uniform conformal polymeric material.
Claims17
A process for coating carbon steel substrates comprising:
- (a) applying onto the surface of said substrate a first coat of a thin hard coated layer of a metal compound selected from the group consisting of titanium nitride, titanium carbide, titanium carbonitride, zirconium nitride, zirconium carbide and zirconium carbonitride;
- and
- (b) applying onto the surface of said first coat a second coat of parylene.
A process for coating carbon steel tool or instrument substrates that are subject to at least moderate amounts of physical wear comprising:
- (a) applying onto the surface of said substrate a first coat of 2-5 microns of titanium nitride or zirconium nitride by cathodic plasma arc deposition;
- and
- (b) applying onto the surface of said first coat a second coat of 2-3 microns of parylene.
Dependencies are inferred from the claim text.