Building material coating
First Claim
1. A coated metal material coated with a highly corrosive-resistant, two-phase tin-zinc alloy by immersing said metal material in a molten bath of said tin-zinc alloy to deposit an impervious layer of said tin-zinc alloy onto said metal material, said tin-zinc coating comprising tin, at least 30 weight percent zinc, nickel an effective amount of metal stabilizer of a metal selected from the group consisting of antimony, bismuth, copper and mixtures thereof.
2 Assignments
0 Petitions
Accused Products
Abstract
A corrosion-resistant colored architectural material which is essentially lead free and is not highly reflective. The coating on the material is a two-phase metallic coating comprised of a large weight percentage of zinc and a relatively large weight percentage of tin. The tin-zinc coating may also include nickel. The tin-zinc composition provides for both a highly corrosive-resistant coating which protects the surface of the architectural material from oxidation and also produces a gray, earth tone colored which is not highly reflective.
49 Citations
36 Claims
- 1. A coated metal material coated with a highly corrosive-resistant, two-phase tin-zinc alloy by immersing said metal material in a molten bath of said tin-zinc alloy to deposit an impervious layer of said tin-zinc alloy onto said metal material, said tin-zinc coating comprising tin, at least 30 weight percent zinc, nickel an effective amount of metal stabilizer of a metal selected from the group consisting of antimony, bismuth, copper and mixtures thereof.
- 6. A coated metal strip formed of a metal having a thickness of less than about 0.1 inch and continuously supplied from a coil of said metal strip and coated with a highly corrosive resistant, two-phase tin-zinc alloy by continuously passing said metal strip through a molten bath of said tin-zinc coating alloy to form a coating alloy having a thickness of 0.0003-0.05 inch, said tin-zinc coating alloy including at least 0.1 weight percent copper, at least 15 weight percent tin wherein said tin content plus the zinc content exceeds 80 weight percent of said coating alloy.
- 9. A coated metal strip formed of a given metal, said metal strip having a thickness of less than about 0.10 inch and exposed surfaces supplied from a coil of said metal strip and coated with a highly corrosive-resistant two-phase tin and zinc alloy by continuously passing said continuous metal strip through a heated molten bath of said coating alloy to deposit an uninterrupted layer of said coating alloy having a thickness in the range of 0.0001 to 0.050 inch onto the exposed surfaces of said moving strip by a continuous hot dip procedure, said coating alloy including at least 15 percent by weight tin, at least about 30 weight percent zinc and a metal additive selected from the group consisting of antimony, bismuth, copper, iron, lead, nickel and mixtures thereof wherein the lead content of said metal additive is less than 0.05 weight percent, said zinc plus said tin comprising at least 80 weight percent of said coating alloy, said metal additive including an effective amount of copper as a coloring agent.
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23. A coated metal strip formed of a strip selected from the group consisting of carbon steel, stainless steel, copper, aluminum and bronze, said strip having a thickness 0.005-0.1 inch and supplied for a coil and coating said strip by continuously passing said strip in a longitudinal direction through a molten bath of metal alloy having a temperature of at least 449°
- F. such that the residence time of said plated strip in said molten bath is 0.166-10 minutes to deposit an impervious layer of a two-phase tin-zinc coating alloy on the surface of said strip, said coating alloy having generally uniform thickness of 0.0001-0.05 inch along the length of said strip and including at least 15 weight percent tin, at least about 30 weight percent zinc and a metal additive, said zinc content plus tin content being at least 90 weight percent of said coating alloy, said metal additive selected from the group consisting of a corrosion additive, a color additive, a metal stabilizing additive, and mixtures thereof, said corrosion additive is an effective amount of nickel, said color additive is an effective amount of copper, and said metal stabilizing additive an effective amount of a metal selected from the group consisting of antimony, bismuth, and mixtures thereof.
- View Dependent Claims (24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36)
Specification