Synthesis of oil containing microcapsules and their use in functional composite coatings
AssigneeTenaris Connections Limited
InventorsMaria Jose Churruca, Pablo Adrian Castro, Federico Jose Williams
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Abstract
Systems and methods for the synthesis of lubricant-containing microcapsules are disclosed. Embodiments of composite nickel and copper coatings containing capsules with liquid lubricating oil cores are also disclosed. In certain embodiments, microcapsules can be incorporated into a metal plating solution to perform composite electrodeposition to obtain self lubricant metallic coatings. In some embodiments, much lower friction coefficient (˜0.8) and far better wear resistance was obtained with the copper/microcapsules composite.
Claims30
A method of manufacturing a composite coating comprising:
- providing a mixture comprising microcapsules and electrolyte, wherein the microcapsules comprise a lubricant encapsulated within a shell, and the concentration of the microcapsules in the mixture is greater than zero and less than about 13 milliliters per liter;
- and
- electroplating a composite coating onto a threaded cathode surface using the mixture and a metal anode, wherein the composite coating comprises metal and at least some of the microcapsules, and wherein all the metal in the coating is a single element metal.
A method of manufacturing a composite coating comprising:
- providing a mixture comprising microcapsules and electrolyte, wherein the microcapsules comprise a lubricant encapsulated within a shell, and the concentration of the microcapsules in the mixture is greater than zero and less than about 13 milliliters per liter;
- and
- electroplating a composite coating onto a threaded cathode surface using the mixture and a metal anode, wherein the composite coating comprises metal and at least some of the microcapsules, and wherein all of the metal in the coating is a single element metal and has a coefficient of friction of less than about 0.8;
- wherein for at least the portions of the threaded cathode surface where the composite coating is electroplated, the composite coating forms a substantially continuous uniform coating over all of the surfaces of a plurality of threads with a thickness of between about 10 to 100 μM.
Dependencies are inferred from the claim text.