Method for coating metallic tubes with corrosion-resistant alloys
AssigneesKenneth Casner, Sr., Kenneth Casner, Jr., Joseph Casner
InventorKenneth Casner, Jr.
Life of this patent
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Abstract
A method for coating an interior surface of a metallic tube with a corrosion-resistant and/or an abrasion-resistant alloy. The method includes placing an alloy within a tube, enclosing the open ends of the tube with end caps, at least one of which is vented, heating the tube by applying current across the tube sufficient to heat the tube and melt the alloy, and spinning tube by the longitudinal axis of the tube to distribute the molten alloy along the interior surface of the tube using the centrifugal forces created by the spinning. An apparatus suitable for carrying out the above method is also disclosed.
Claims23
A method for coating an interior surface of a metallic tube with a first alloy, the tube comprising at least one open end and an interior surface, the method comprising:
- placing a quantity of a first alloy in the tube, the first alloy being in a solid form selected from the group consisting of powder, shots and pellets;
- enclosing the at least one open end of the tube with a cap;
- heating the tube by applying current across the tube sufficient to heat the tube and melt the first alloy;
- lowering the tube and first alloy to a nesting fixture comprising two pairs of rollers spaced apart from each other along a longitudinal axis of the tube, the nesting fixture providing a horizontal support for the tube;
- rotating at least one of said rollers to spin the tube about a longitudinal axis of the tube to distribute the molten first alloy along the interior surface of the tube.
A method for coating an interior surface of a metallic casing with a first alloy, the casing comprising two open ends and an interior surface, the method comprising:
- placing a quantity of a first alloy in the casing sufficient to coat the interior surface of the casing the first alloy being in a solid form selected from the group consisting of powder, shots and pellets;
- enclosing both open ends of the casing with caps, at least one of the caps comprising a pressure release mechanism;
- lowering the tube and first alloy to a nesting fixture comprising two pairs of rollers spaced apart from each other along a longitudinal axis of the tube, the nesting fixture providing a horizontal support for the tube;
- heating the casing by engaging two electrodes in a longitudinally spaced apart fashion with the casing and applying current across the casing sufficient to heat the casing and melt the first alloy;
- spinning the casing on the rollers about a longitudinal axis of the casing to distribute the molten first alloy along the interior surface of the casing while continuing to heat the casing by applying said sufficient current across the casing;
- cooling the casing and the first alloy.
Dependencies are inferred from the claim text.