High density thermal spray coating
Amoco Corporation
A high density, substantially oxide-free metal layer is deposited by spray deposition on a substrate in an atmosphere containing ambient air having an oxygen content above about 0.1% by weight. This is accomplished by directing a supersonic-velocity jet stream of hot gases carrying metal particles at the substrate through an inert gas shroud. The layer is useful as a corrosion barrier and for repairing metal substrates.
1ClaimsFirst of 5
- 1
An article comprising a layer deposited upon a substrate wherein said layer is deposited by spray deposition on said substrate in an atmosphere containing ambient air having an oxygen content above about 1,000 parts per million by weight, wherein said layer comprises a metal alloy, the volume of voids and oxide inclusions in said layer represents less than about 1% of said layer volume, and oxide in said layer represents less than about 1% of the layer by weight, wherein said spray deposition…
2Description
This is a division, of application Ser. No. 07/392,451, filed Aug. 11, 1989, now U.S. Pat. No. 5,019,429 which in turn is a continuation-in-part of Ser. No. 138,815 filed Dec. 28, 1987, now U.S. Pat. No. 4,869,936 issued Mar. 22, 1989.