Patent ID: 6123999
Filing Date: 2000-09-26
Classification: C23C

Abstract:
A method of preparing a surface of an unroughened aluminum or stainless steel substrate for subsequent coating with a nonstick polymer resin comprising applying onto said unroughened surface a metallic layer by feeding a pair of wires of a metal, which is aluminum containing up to 50% by weight of silicon when said surface is aluminum and which is stainless steel when said surface is stainless steel, into an electric arc to form molten metal from said wires in said arc and contacting said molten metal with gas flowing through said arc to convert said molten metal to a spray of molten metal droplets having an included spray angle, aimed at said surface to form said metallic layer thereon, wherein the current creating said arc is at least 350 amps and up to 1000 amps.