US 5,592,927 A · Method of depositing and using a composite coating on light metal substrates

Abstract

Method of depositing an Fe.sub.x O comprising coating onto a light metal substrate by use of wire-arc thermal spraying that propels atomized droplets by use of atomizing gases, comprising: preparing at least one surface of the light metal substrate to present an exposed essentially non-oxidized substrate surface; and thermally spraying melted droplets of a steel feedstock wire onto the prepared surface by use of propellant gases to deposit a composite coating, the gases being controlled as to content to regulate the exposure of the droplets to oxygen so that Fe.sub.x O is substantially the only iron oxide formed during spraying, x being 0.5-1.5.

Claims10

Dependent claims

A method of depositing an Fe.sub.x O comprising coating onto a light metal substrate by use of wire-arc thermal spraying that propels atomized droplets by use of atomizing gases, comprising:

(a) preparing at least one surface of said light metal substrate to present an exposed essentially non oxidized substrate surface;
and
(b) thermally spraying melted droplets of a low carbon (0.04-2% by wt.) steel feedstock wire onto said prepared surface by use of propellant gases at a gas flow rate of 30-120 SCFM to deposit a composite coating, the gases being controlled as to content to regulate the exposure of said droplets to oxygen so that wustite of the formula Fe.sub.x O (Wustite) is the only iron oxide formed during spraying, x being 0.5-1.5, said coating containing said wustite in amount of 5-30% by volume with the balance being iron based of a composition essentially that of the starting feedstock.

Dependencies are inferred from the claim text.

Method of depositing and using a composite coating on light metal substrates

Life of this patent

Method of depositing and using a composite coating on light metal substrates

Life of this patent

Abstract

Claims10