US 4,302,483 A · Metallizing of a corrodible metal with a protective metal

Abstract

An apparatus and method for spray metallizing a coating of metal (e.g., zinc) onto one or both sides of a base metal (e.g. steel). One embodiment of the invention comprises melting the metal to be deposited, propelling first and second streams of the melted metal towards the base metal at a point of convergence adjacent to the substrate, and applying a potential difference between the streams to form an electric arc whereby superheated particles are deposited on the base metal. A second embodiment of the invention comprises melting the metal to be deposited, propelling a stream of the melted metal towards the base metal through a nozzle containing a non-consumable stationary electrode, and applying a potential difference between the molten metal and the electrode to form an electric arc whereby superheated particles are deposited on the base metal.

Claims16

Dependent claims

Apparatus for spray metallizing a substrate comprising;

an electrically isolated container for holding metal to be sprayed;
a molten metal nozzle within a molten metal nozzle assembly for causing a stream of charged molten metal functioning as a consumable non-stationary electrode to exit as a jet stream within an oppositely charged non-consumable stationary electrode;
a low pressure gas source between the molten metal nozzle and the non-consumable stationary electrode to stabilize the electric arc;
a high pressure gas source between the non-consumable stationary electrode and the outer cap of said molten metal nozzle for propelling the metal from the electric arc to the surface to be metalized;
a conduit for conveying molten metal from the container to the molten metal nozzle;
means for causing molten metal to flow from a container through a conduit to a nozzle;
and,
a power supply to cause an arc between the stream of molten metal and the non-consumable stationary electrode.

5 more elements

Dependencies are inferred from the claim text.

Metallizing of a corrodible metal with a protective metal

Life of this patent

Metallizing of a corrodible metal with a protective metal

Life of this patent

Abstract

Claims16