Hot dip coating apparatus
AssigneeBluescope Steel Limited
InventorsGreg Harris, Nega Setargew, David Willis
Life of this patent
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Abstract
Hot dip coating apparatus for coating a steel strip in an Al—Zn alloy bath comprises components that are made from stainless steel containing an appreciable amount of nitrogen distributed substantially uniformly through its microstructure. The nitrogen is incorporated into the stainless steel as an alloy additive and improves the steel's corrosion resistance and minimizes pitting and thinning of the component when immersed in the metal bath for extended periods.
Claims17
A hot dip coating apparatus for coating a steel strip wherein the strip is immersed in a bath of coating alloy containing aluminum, the apparatus including at least one component having a surface that comes into contact with the bath when in use, wherein the component is made from stainless steel containing an appreciable amount of nitrogen distributed substantially uniformly throughout its microstructure.
The hot dip coating apparatus for coating a steel strip wherein the strip is immersed in a bath of coating alloy containing aluminum, the apparatus including at least one component having a surface that comes into contact with the bath when in use, wherein the component includes at least one layer made from stainless steel containing an appreciable amount of nitrogen distributed uniformly through it microstructure.
A component for a hot dip coating apparatus for coating a steel strip wherein the strip is immersed in a bath of coating alloy containing aluminum, the component having a surface that comes into contact with the bath when in use, and is made at least in part from stainless steel containing an appreciable amount of nitrogen distributed substantially uniformly throughout its microstructure.
A method of forming a component of a hot dip apparatus for immersing a sheet metal strip in a bath of coating alloy containing aluminum, wherein the component is formed at least in part from a stainless steel containing an appreciable amount of nitrogen, the nitrogen being dissolved into the stainless steel in a molten state so as to be substantially distributed throughout its microstructure.
A method of coating a steel strip wherein the strip is immersed in a bath of coating alloy containing aluminum, the method comprising the step of passing the steel strip over a component immersed in the bath, wherein the component is made from stainless steel containing an appreciable amount of nitrogen distributed substantially uniformly through its microstructure.
A component for a hot dip coating apparatus for coating a steel strip wherein the strip is immersed in a bath of coating alloy containing aluminum, the component having a surface that comes into contact with the bath when in use, wherein the component includes at least one layer made from stainless steel containing an appreciable amount of nitrogen distributed uniformly through its microstructure.
Dependencies are inferred from the claim text.