# US 10,246,784 B2 · Decreasing corrosion on metal surfaces with apatite forming components > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,246,784 B2 - Document ID: US10246784B2 - Status: Granted - Kind: B2 - Application number: 15/354,578 - Filed: 2016-11-17 - Published: 2017-06-01 - Granted: 2019-04-02 - Earliest claimed: 2015-11-30 - Assignees: Baker Hughes, A Ge Company, LLC - Applicants: Baker Hughes Incorporated - Inventors: Zhengwei Liu; Tracey Jackson; Richard Martin - Web page: https://patentgrep.com/patent/US10246784B2 ## CPC - C23F 11/184: {Phosphorous, arsenic, antimony or bismuth containing compounds} - C09D 1/00: Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances - C09D 5/084: {Inorganic compounds} - C09D 7/40: Additives - C09D 7/48: Stabilisers against degradation by oxygen, light or heat - C09K 8/54: Compositions for in situ inhibition of corrosion in boreholes or wells - C23F 11/08: in other liquids - C23F 11/10: using organic inhibitors - C02F 2303/08: Corrosion inhibition - C09K 2208/32: Anticorrosion additives - C23F: NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE (working metal by laser beams B23K26/00; desurfacing by applying flames B23K7/00; working of metal by electro-erosion B23H; producing decorative effects by removing surface material, e.g. by engraving, by etching, B44C1/22; electrolytic etching or polishing C25F); INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25 - C09D: COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR (cosmetics A61K; processes for applying liquids or other fluent materials to surfaces, in general, B05D; staining wood B27K5/02; glazes or vitreous enamels C03C; natural resins, French polish, drying-oils, driers, turpentine, per se, C09F; polishing compositions other than French polish, ski waxes C09G; adhesives or use of materials as adhesives C09J; materials for sealing or packing joints or covers C09K3/10; materials for stopping leaks C09K3/12; processes for the electrolytic or electrophoretic production of coatings C25D) - C09K: MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE - C02F: TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE (separation in general B01D; special arrangements on waterborne vessels of installations for treating water, waste water or sewage, e.g. for producing fresh water, B63J; adding materials to water to prevent corrosion C23F; treating radioactively-contaminated liquids G21F9/04; regeneration of reactants for recirculation into processes, see the relevant places for the processes) ## Abstract Corrosion to a metal surface in contact with corrosion forming components within an aqueous-based fluid system may be decreased, prevented, and/or inhibited by contacting the metal surface(s) with apatite forming components and forming at least one apatite species on the surface with the apatite forming components. The apatite forming components may be or include phosphates, organophosphates and combinations thereof. In a non-limiting embodiment, the apatite forming components may further include fluorides, chlorides, calcium, and combinations thereof. ## Claims ### Claim 1 A method for decreasing corrosion to a metal surface in an oil production system, wherein the method comprises: circulating an aqueous-based fluid comprising apatite forming components into an oil production system; contacting at least one metal surface within the oil production system with the apatite forming components; and forming at least one apatite species selected from the group consisting of fluoroapatite, chloroapatite, and combinations thereof on the at least one metal surface with the apatite forming components; wherein less corrosion occurs to at least one metal surface as compared to an otherwise identical method without the contact of at least one metal surface with the apatite forming components. ### Claim 2 (depends on 1) The method of claim 1, wherein the metal surface is selected from the group consisting of an iron-containing surface, an aluminum-containing surface, a copper-containing surface, and combinations thereof. ### Claim 3 (depends on 1) The method of claim 1, wherein the apatite forming components are selected from the group consisting of phosphates, organophosphates, and combinations thereof. ### Claim 4 (depends on 1) The method of claim 1, wherein the apatite forming components are present in the aqueous-based fluid in an amount ranging from about 1 ppm to about 20,000 ppm based on the total volume of the aqueous-based fluid. ### Claim 5 (depends on 1) The method of claim 1, wherein the aqueous-based fluid further comprises corrosion forming components in an amount ranging from about 10 ppm to about 50,000 ppm based on the total volume of the aqueous-based fluid. ### Claim 6 (depends on 1) The method of claim 1, wherein a temperature of the aqueous-based fluid ranges from about 30° C. to about 450° C. ### Claim 7 (depends on 1) The method of claim 1, further comprising contacting the metal surface with a second fluid at the same time or different time from the aqueous-based fluid; wherein the second fluid comprises total dissolved solids in an amount ranging from about 1,000 ppm to about 400,000 ppm based on the total volume of the second fluid. ### Claim 8 (depends on 1) The method of claim 1, wherein the aqueous-based fluid comprises total dissolved solids in an amount ranging from about 1,000 ppm to about 400,000 ppm based on the total volume of the aqueous-based fluid. ### Claim 9 (depends on 1) The method of claim 1, wherein the aqueous-based fluid further comprises corrosion forming components selected from the group consisting of metal carbonates, metal sulfates, metal oxides, metal phosphates, metal chloride, and combinations thereof. ### Claim 10 (depends on 1) The method of claim 1, wherein the aqueous-based fluid is selected from the group consisting of a drilling fluid, a completions fluid, an injection fluid, a servicing fluid, a production fluid, a refinery fluid, and combinations thereof. ### Claim 11 A system for decreasing corrosion to a metal surface comprising: at least one metal surface within an oil production system; an aqueous-based fluid; at least one apatite species selected from the group consisting of fluoroapatite, chloroapatite, and combinations thereof formed upon the metal surface; and corrosion forming components; wherein less corrosion occurs to the at least one metal surface in the presence of the at least one apatite species as compared to an otherwise identical at least one metal surface absent the at least one apatite species. ### Claim 12 (depends on 11) The aqueous-based fluid system of claim 11, wherein a temperature of the aqueous-based fluid ranges from about 30° C. to about 450° C. ### Claim 13 (depends on 11) The aqueous-based fluid system of claim 11, wherein the aqueous-based fluid comprises total dissolved solids in an amount ranging from about 1000 ppm to about 400,000 ppm based on the total volume of the fluid. ### Claim 14 A method for decreasing corrosion to a metal surface in an oil production system, wherein the method comprises: shutting down an oil production system; applying a hydrocarbon-based solution comprising apatite forming components to the oil production system in a batch treatment; contacting at least one metal surface within the oil production system system with the hydrocarbon-based solution comprising apatite forming components; bringing the oil production system back online, wherein once the oil production system is brought back online, less corrosion occurs to the at least one metal surface in the presence of the apatite forming components as compared to an otherwise identical at least one metal surface absent the apatite forming components.