WO2023057594A1 - Extrémité filetée d'un composant tubulaire pourvue d'un revêtement comprenant un alliage zinc-chrome - Google Patents
Extrémité filetée d'un composant tubulaire pourvue d'un revêtement comprenant un alliage zinc-chrome Download PDFInfo
- Publication number
- WO2023057594A1 WO2023057594A1 PCT/EP2022/077856 EP2022077856W WO2023057594A1 WO 2023057594 A1 WO2023057594 A1 WO 2023057594A1 EP 2022077856 W EP2022077856 W EP 2022077856W WO 2023057594 A1 WO2023057594 A1 WO 2023057594A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- zinc
- chromium
- tubular component
- weight
- threaded end
- Prior art date
Links
- DQIPXGFHRRCVHY-UHFFFAOYSA-N chromium zinc Chemical compound [Cr].[Zn] DQIPXGFHRRCVHY-UHFFFAOYSA-N 0.000 title claims abstract description 107
- 229910000599 Cr alloy Inorganic materials 0.000 title claims description 39
- 239000000788 chromium alloy Substances 0.000 title claims description 39
- 238000000576 coating method Methods 0.000 title description 138
- 239000011248 coating agent Substances 0.000 title description 96
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 40
- 239000000956 alloy Substances 0.000 claims abstract description 40
- 239000000203 mixture Substances 0.000 claims abstract description 25
- 230000002093 peripheral effect Effects 0.000 claims abstract description 25
- JBQYATWDVHIOAR-UHFFFAOYSA-N tellanylidenegermanium Chemical compound [Te]=[Ge] JBQYATWDVHIOAR-UHFFFAOYSA-N 0.000 claims abstract description 25
- 238000000034 method Methods 0.000 claims abstract description 21
- 239000004094 surface-active agent Substances 0.000 claims abstract description 15
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 13
- 239000004215 Carbon black (E152) Substances 0.000 claims abstract description 13
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 13
- 238000005553 drilling Methods 0.000 claims abstract description 13
- 229930195733 hydrocarbon Natural products 0.000 claims abstract description 13
- 150000002430 hydrocarbons Chemical class 0.000 claims abstract description 13
- 239000007789 gas Substances 0.000 claims abstract description 12
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 12
- 239000001257 hydrogen Substances 0.000 claims abstract description 12
- 150000001844 chromium Chemical class 0.000 claims abstract description 9
- 150000003751 zinc Chemical class 0.000 claims abstract description 9
- 239000003792 electrolyte Substances 0.000 claims abstract description 4
- 125000004435 hydrogen atom Chemical class [H]* 0.000 claims abstract 4
- 239000011651 chromium Substances 0.000 claims description 86
- 229910052804 chromium Inorganic materials 0.000 claims description 70
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 64
- 238000007789 sealing Methods 0.000 claims description 20
- 229910000831 Steel Inorganic materials 0.000 claims description 11
- 239000010959 steel Substances 0.000 claims description 11
- 238000005488 sandblasting Methods 0.000 claims description 10
- 238000002360 preparation method Methods 0.000 claims description 7
- 229910001297 Zn alloy Inorganic materials 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 239000002736 nonionic surfactant Substances 0.000 claims description 3
- 230000008021 deposition Effects 0.000 abstract description 16
- 238000005260 corrosion Methods 0.000 description 37
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 34
- 239000011701 zinc Substances 0.000 description 29
- 229910052751 metal Inorganic materials 0.000 description 27
- 241001163841 Albugo ipomoeae-panduratae Species 0.000 description 26
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 26
- 229910052725 zinc Inorganic materials 0.000 description 26
- 230000007797 corrosion Effects 0.000 description 20
- QELJHCBNGDEXLD-UHFFFAOYSA-N nickel zinc Chemical compound [Ni].[Zn] QELJHCBNGDEXLD-UHFFFAOYSA-N 0.000 description 20
- 150000003839 salts Chemical class 0.000 description 18
- DHMQDGOQFOQNFH-UHFFFAOYSA-N Glycine Chemical compound NCC(O)=O DHMQDGOQFOQNFH-UHFFFAOYSA-N 0.000 description 16
- 238000000151 deposition Methods 0.000 description 15
- 229910052759 nickel Inorganic materials 0.000 description 15
- 239000002184 metal Substances 0.000 description 14
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 9
- 239000007921 spray Substances 0.000 description 9
- 239000004471 Glycine Substances 0.000 description 8
- 239000000758 substrate Substances 0.000 description 8
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 7
- 238000002161 passivation Methods 0.000 description 7
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 6
- 150000002431 hydrogen Chemical class 0.000 description 6
- BFGKITSFLPAWGI-UHFFFAOYSA-N chromium(3+) Chemical compound [Cr+3] BFGKITSFLPAWGI-UHFFFAOYSA-N 0.000 description 5
- 239000011777 magnesium Substances 0.000 description 5
- 238000003860 storage Methods 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- 230000003746 surface roughness Effects 0.000 description 5
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 4
- -1 chromium salt Chemical class 0.000 description 4
- 230000014509 gene expression Effects 0.000 description 4
- 239000012535 impurity Substances 0.000 description 4
- 230000007774 longterm Effects 0.000 description 4
- NDKWCCLKSWNDBG-UHFFFAOYSA-N zinc;dioxido(dioxo)chromium Chemical compound [Zn+2].[O-][Cr]([O-])(=O)=O NDKWCCLKSWNDBG-UHFFFAOYSA-N 0.000 description 4
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 3
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 3
- WGLPBDUCMAPZCE-UHFFFAOYSA-N Trioxochromium Chemical compound O=[Cr](=O)=O WGLPBDUCMAPZCE-UHFFFAOYSA-N 0.000 description 3
- 229910000423 chromium oxide Inorganic materials 0.000 description 3
- 238000009792 diffusion process Methods 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- 230000001050 lubricating effect Effects 0.000 description 3
- 229910052749 magnesium Inorganic materials 0.000 description 3
- 239000011572 manganese Substances 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- 229910052938 sodium sulfate Inorganic materials 0.000 description 3
- 235000011152 sodium sulphate Nutrition 0.000 description 3
- 231100000331 toxic Toxicity 0.000 description 3
- 230000002588 toxic effect Effects 0.000 description 3
- 231100000419 toxicity Toxicity 0.000 description 3
- 230000001988 toxicity Effects 0.000 description 3
- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- NWONKYPBYAMBJT-UHFFFAOYSA-L zinc sulfate Chemical compound [Zn+2].[O-]S([O-])(=O)=O NWONKYPBYAMBJT-UHFFFAOYSA-L 0.000 description 3
- 235000009529 zinc sulphate Nutrition 0.000 description 3
- 239000011686 zinc sulphate Substances 0.000 description 3
- JECYNCQXXKQDJN-UHFFFAOYSA-N 2-(2-methylhexan-2-yloxymethyl)oxirane Chemical compound CCCCC(C)(C)OCC1CO1 JECYNCQXXKQDJN-UHFFFAOYSA-N 0.000 description 2
- 229910000975 Carbon steel Inorganic materials 0.000 description 2
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 2
- 239000008186 active pharmaceutical agent Substances 0.000 description 2
- 230000001464 adherent effect Effects 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 238000005275 alloying Methods 0.000 description 2
- 150000001413 amino acids Chemical class 0.000 description 2
- 239000010962 carbon steel Substances 0.000 description 2
- 238000004210 cathodic protection Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000010941 cobalt Substances 0.000 description 2
- 229910017052 cobalt Inorganic materials 0.000 description 2
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 2
- 230000001427 coherent effect Effects 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000004070 electrodeposition Methods 0.000 description 2
- 150000002191 fatty alcohols Chemical class 0.000 description 2
- 229910052748 manganese Inorganic materials 0.000 description 2
- 150000002815 nickel Chemical class 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- JIAARYAFYJHUJI-UHFFFAOYSA-L zinc dichloride Chemical compound [Cl-].[Cl-].[Zn+2] JIAARYAFYJHUJI-UHFFFAOYSA-L 0.000 description 2
- UGZADUVQMDAIAO-UHFFFAOYSA-L zinc hydroxide Chemical class [OH-].[OH-].[Zn+2] UGZADUVQMDAIAO-UHFFFAOYSA-L 0.000 description 2
- NKJOXAZJBOMXID-UHFFFAOYSA-N 1,1'-Oxybisoctane Chemical compound CCCCCCCCOCCCCCCCC NKJOXAZJBOMXID-UHFFFAOYSA-N 0.000 description 1
- JJKVMNNUINFIRK-UHFFFAOYSA-N 4-amino-n-(4-methoxyphenyl)benzamide Chemical compound C1=CC(OC)=CC=C1NC(=O)C1=CC=C(N)C=C1 JJKVMNNUINFIRK-UHFFFAOYSA-N 0.000 description 1
- 229910000990 Ni alloy Inorganic materials 0.000 description 1
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 1
- 238000013019 agitation Methods 0.000 description 1
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 description 1
- 229910052921 ammonium sulfate Inorganic materials 0.000 description 1
- 239000001166 ammonium sulphate Substances 0.000 description 1
- 235000011130 ammonium sulphate Nutrition 0.000 description 1
- 229910001566 austenite Inorganic materials 0.000 description 1
- 239000010953 base metal Substances 0.000 description 1
- 150000001661 cadmium Chemical class 0.000 description 1
- 229910052793 cadmium Inorganic materials 0.000 description 1
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 description 1
- 230000000711 cancerogenic effect Effects 0.000 description 1
- 231100000315 carcinogenic Toxicity 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- GRWVQDDAKZFPFI-UHFFFAOYSA-H chromium(III) sulfate Chemical compound [Cr+3].[Cr+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O GRWVQDDAKZFPFI-UHFFFAOYSA-H 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 150000001868 cobalt Chemical class 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 230000009931 harmful effect Effects 0.000 description 1
- 238000010348 incorporation Methods 0.000 description 1
- 238000007373 indentation Methods 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 159000000003 magnesium salts Chemical class 0.000 description 1
- 229910000734 martensite Inorganic materials 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 231100000219 mutagenic Toxicity 0.000 description 1
- 230000003505 mutagenic effect Effects 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 230000033116 oxidation-reduction process Effects 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 229920001223 polyethylene glycol Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- OTYBMLCTZGSZBG-UHFFFAOYSA-L potassium sulfate Chemical compound [K+].[K+].[O-]S([O-])(=O)=O OTYBMLCTZGSZBG-UHFFFAOYSA-L 0.000 description 1
- 229910052939 potassium sulfate Inorganic materials 0.000 description 1
- 239000001120 potassium sulphate Substances 0.000 description 1
- 235000011151 potassium sulphates Nutrition 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- NQLVQOSNDJXLKG-UHFFFAOYSA-N prosulfocarb Chemical compound CCCN(CCC)C(=O)SCC1=CC=CC=C1 NQLVQOSNDJXLKG-UHFFFAOYSA-N 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000003440 toxic substance Substances 0.000 description 1
- 235000005074 zinc chloride Nutrition 0.000 description 1
- 239000011592 zinc chloride Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D7/00—Electroplating characterised by the article coated
- C25D7/003—Threaded pieces, e.g. bolts or nuts
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D3/00—Electroplating: Baths therefor
- C25D3/02—Electroplating: Baths therefor from solutions
- C25D3/56—Electroplating: Baths therefor from solutions of alloys
- C25D3/565—Electroplating: Baths therefor from solutions of alloys containing more than 50% by weight of zinc
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
- C25D5/34—Pretreatment of metallic surfaces to be electroplated
- C25D5/36—Pretreatment of metallic surfaces to be electroplated of iron or steel
Definitions
- TITLE Threaded end of a tubular component provided with a coating comprising a zinc-chromium alloy
- the present invention relates to a threaded end of a tubular component for drilling and/or operating a hydrocarbon well, transporting oil and gas, transporting or storing hydrogen, capturing carbon or geothermal energy, comprising at least one thread whose surface is provided with a coating based on zinc and chromium as described below.
- the invention also relates to a method for preparing a threaded end of a tubular component comprising at least one electrolytic deposition of an aqueous composition based on one or more zinc salts, one or more chromium salts, one or more surfactants and one or more electrolytes, on the surface of the thread of said end.
- the present invention also relates to a tubular threaded joint comprising at least one threaded end of a tubular component, the surface of the thread of which is covered with a coating based on zinc and chromium as described below.
- tubular component is meant within the meaning of the present invention any element or accessory having a substantially tubular shape capable of being assembled with another element, of the same type or not, which is intended for drilling and / or the exploitation of a hydrocarbon wells, the transport of oil and gas, the transport and/or storage of hydrogen and the capture of carbon or geothermal energy.
- threaded end of a tubular component is meant within the meaning of the present invention any end element of a tubular component, as defined above, the surface of which is provided with at least one threaded portion, i. e. a thread, which makes it possible to assemble or connect the tubular component to another component, of the same type or not, in order to form a joint or a connection.
- threaded end of a tubular component within the meaning of the invention corresponds to any end element of a component tubular comprising at least one threaded surface and participating in the connection of the tubular component with another similar component or not.
- Each tubular component has one end with at least one male type threaded area, i . e. the thread of which extends over the outer peripheral surface, and/or an end provided with at least one threaded zone of the female type, i . e. whose thread extends over the inner peripheral surface, each intended to be assembled by screwing with the corresponding end of a component, similar or not, in order to form a joint or a connection.
- threaded tubular components of a connection are generally assembled under defined constraints in order to meet the tightening and sealing requirements imposed by the conditions of use, more precisely a defined torque is targeted.
- threaded tubular components may have to undergo several cycles of screwing and unscrewing, especially in service.
- constraints induced include in particular storage resistance constraints requiring the application of storage greases (different from screwing greases applied before commissioning).
- storage greases different from screwing greases applied before commissioning
- the screwing and unscrewing operations are generally carried out under heavy axial load, for example under the weight of a tube several meters in length, typically 10 to 13 meters, to be assembled by the vertically threaded joint, possibly aggravated by a slight misalignment of the axis of the threaded elements to be assembled.
- This induces risks of seizing at the level of the connection elements of the tube, in particular at the level of the threaded zones but also at the level zones in abutment and/or on the metal/metal sealing surfaces. Consequently, it is important to protect these connection elements, in particular the threaded zones, against seizing, by covering them in particular with lubricants.
- threaded tubular components are often stored and then screwed together in an aggressive environment. This is particularly the case of a situation called “at sea” (offshore in English) in the presence of salt mist or a situation called “on land” (onshore in English) in the presence of sand, dust, and/or other pollutants, causing risks of corrosion. It is therefore customary to use different types of anti-corrosion coating on the surfaces subjected to screwing, which is the case of the threaded areas or else in tight contact, which is the case of the metal/metal sealing surfaces and the abutting areas.
- a metallic coating based on zinc (Zn) and nickel (Ni) has been developed in order to protect against corrosion and seizure of the connection elements, in particular the threaded areas, of a tubular component.
- this metallic coating has the major drawback of being prepared from nickel salts which are chemical substances which have harmful effects on human health. Indeed, nickel salts are classified among the so-called substances "CMR", i . e. considered to be carcinogenic, mutagenic and toxic for reproduction.
- CMR substances which have harmful effects on human health.
- the metal coating based on zinc and nickel is thus commonly used in industry because of its properties against corrosion and seizing but its toxicity has the parallel consequence of regularly exposing a very large number of operators to health risks. likely to be serious in the long term.
- zinc (Zn) and cobalt (Co) coatings typically those comprising a content of about 1% by weight of cobalt, also prove to be toxic because their method of preparation is based on the setting work of cobalt salts which are also classified as “CMR” substances.
- Coatings based on zinc (Zn) and magnesium (Mg) are obtained in particular by electrodeposition of zinc salts and magnesium salts in the presence of solvents at high temperatures, typically at temperatures of the order of 100° C., which makes the preparation process difficult to set up on an industrial scale.
- zinc (Zn) and magnesium (Mg), zinc (Zn) and iron (Fe) or even zinc (Zn) and manganese (Mn) coatings provide cathodic protection to the substrate of less than that offered by a coating based on zinc (Zn) and nickel (Ni), i.e. therefore a lower anti-corrosion protection, due to the fact that the alloying elements (magnesium, manganese and iron) have lower standard oxidation-reduction potentials to that of nickel.
- a tubular component intended for drilling and/or operating a hydrocarbon well, transporting oil and gas, transporting or storing hydrogen, and capturing carbon or geothermal energy.
- One of the objectives of the present invention is thus to provide a coating having reduced toxicity, or even non-toxic, and whose anti-corrosion and anti-seizing performance is not negatively affected by the nature of the elements of the alloy so as to protect effectively the threaded elements of a tubular component used to assemble it to another tubular component, similar or not.
- the object of the present invention is therefore in particular a threaded end of a tubular component for drilling and/or operating a hydrocarbon well, transporting oil and gas, transporting or storing hydrogen.
- carbon capture or geothermal energy comprising at least one thread extending over its outer or inner peripheral surface, the thread of which is coated with a layer comprising a zinc-chromium alloy (Zn-Cr) including zinc (Zn) is the major element by weight, relative to the total weight of the alloy.
- the coating comprising a zinc-chromium (Zn-Cr) alloy, of which zinc (Zn) is the major metallic element by weight, relative to the total weight of the alloy covers at least one thread. of the threaded end of the tubular component, as defined above.
- the threaded end of the tubular component comprises at least one thread extending on its outer or inner peripheral surface and at least one non-threaded portion, preferably containing a stop and/or a bearing surface. sealing; the threading and the non-threaded portion being covered by a coating comprising a zinc-chromium alloy (Zn-Cr) of which zinc (Zn) is the major metallic element by weight, compared to the total weight of the alloy.
- Zn-Cr zinc-chromium alloy
- the zinc-chromium (Zn-Cr) coating according to the invention covers at least one thread of the threaded end of the tubular component, as defined above, and preferably at least said thread and at least one non-threaded portion , preferably containing a stopper and/or a sealing surface, of the threaded end of the tubular component.
- the layer comprising the zinc-chromium alloy corresponds both to a coating comprising a zinc-chromium alloy (Zn-Cr) or a zinc-chromium coating.
- chromium Zn-Cr
- the terms “layer” and “coating” can be used interchangeably to designate the deposit of zinc-chromium alloy, as defined according to the invention, covering at least the threading of the threaded end of the component. tubular.
- the layer comprising the zinc-chromium (Zn-Cr) alloy is different from the superposition of a layer of zinc (Zn) and a layer of chromium (Cr).
- a “zinc-chromium (Zn-Cr)” alloy is meant within the meaning of the present invention a mixture comprising zinc and chromium, in which zinc represents the base metal, i. e. the metallic element predominately present in the mixture, and chromium represents a addition metallic element, i.e. a metallic element present or intentionally added to the mixture.
- the chromium present in the zinc-chromium (Zn-Cr) alloy is not an impurity or an unwanted metallic element in the alloy.
- chromium represents the major addition metal element by weight among all the addition metal elements likely to be present in the mixture.
- the zinc-chromium (Zn-Cr) coating according to the invention has the advantage of not being toxic because the chromium salts used during the preparation process are not classified among the so-called "CMR” substances, which makes it possible to less expose operators to serious health risks.
- the chromium present in the zinc-chromium alloy corresponds to/is trivalent chromium Cr (III).
- the zinc-chromium (Zn-Cr) coating in accordance with the invention makes it possible to guarantee effective protection against corrosion and seizing of a threaded end of a tubular component, including in very aggressive environments such as the marine, industrial environment, environments subject to heavy precipitation and/or undergoing high thermal amplitudes.
- the zinc-chromium (Zn-Cr) coating used according to the invention thus confers a good level of resistance to corrosion by providing effective cathodic protection of the substrate.
- the chromium contained in the zinc-chromium metal coating according to the invention is naturally passivated by forming chromium oxide, which makes it possible to guarantee effective protection against corrosion.
- the natural formation of chromium oxide makes it possible to dispense with the implementation of an additional passivation step aimed at reinforcing the anti-corrosion protection of the substrate, ensuring time savings from an industrial point of view.
- the zinc-chrome (Zn-Cr) coating also has excellent lubricating properties guaranteeing effective protection against seizure of the threaded end during successive operations of screwing and unscrewing the tubular component.
- the zinc-chrome (Zn-Cr) coating used according to the invention also has the advantage of being resistant to wear during successive screwings, which allows it to continue to guarantee anti-corrosion and anti-seizing performance even after several screwing/unscrewing cycles without the need for additional anti-corrosion and anti-seizing protection.
- the zinc-chromium (Zn-Cr) coating according to the invention is capable of providing protection against corrosion and seizing over the long term, including after several screwing and unscrewing operations of the tubular component. in an aggressive environment.
- Wear resistance can in particular be determined by means of an indentation test, in particular a scratch test.
- This test consists in particular in applying a load, in particular a ball, which is moved under increasing pressure on the surface of the coating until the appearance of flaking, i . e. adhesive failure of the coating.
- the critical load for which an adhesive failure occurs is measured in particular.
- the threaded end according to the invention has an increased resistance to corrosion and seizure, including after several screwing and unscrewing cycles of the tubular component provided with said end, and this even in the aggressive environments mentioned above.
- the zinc-chromium (Zn-Cr) coating according to the invention has a performance at least as good as that of a zinc-nickel (Zn-Ni) coating with respect to the appearance of red rust. .
- the zinc-chromium (Zn-Cr) coating according to the invention has a performance superior to that of a zinc-nickel (Zn-Ni) coating with respect to the appearance of white rust.
- the salt spray tests carried out without passivation of the coating, show a rapid appearance of rust.
- white rust on zinc-nickel (Zn-Ni) coatings and a much slower appearance of this white rust for a zinc-chromium (Zn-Cr) coating according to the invention, even for a thickness divided by half.
- zinc (Zn) is the major element by weight relative to the total weight of the alloy.
- zinc has the highest content by weight among the elements of the alloy.
- the thread is coated with a layer consisting of a binary zinc-chromium alloy (Zn-Cr) of which zinc (Zn) is the major element by weight, relative to the total weight of the alloy.
- Zn-Cr binary zinc-chromium alloy
- the term "content" corresponds to the concentration by weight of the metallic element considered in relation to the concentration of all the elements present in the alloy.
- the “content” corresponds to the concentration by weight of the metallic element considered in relation to the total concentration of the mixture.
- the zinc (Zn) content is greater than 50% by weight, preferably greater than or equal to 60% by weight, more preferably greater than or equal to 65% by weight, relative to the total weight of the zinc-chromium alloy.
- the zinc (Zn) content varies from 70% to 80% by weight, more preferably from 70 to 75% by weight relative to the total weight of the zinc-chromium alloy.
- the chromium (Cr) content is greater than or equal to 3% by weight, preferably greater than or equal to 20% by weight, relative to the total weight of the zinc-chromium alloy.
- chromium is the only additional metallic element present in the zinc-chromium (Zn-Cr) alloy.
- the zinc-chromium (Zn-Cr) alloy is a mixture comprising zinc, representing the major metallic element by weight relative to the total weight of the alloy, chromium, which is a metallic addition element, preferably the single metallic addition element, and optionally one or more metallic or non-metallic impurities.
- additional metallic element is meant, within the meaning of the invention, an additional alloying element deliberately present or added to the alloy.
- an addition metallic element is not an impurity.
- the chromium present in the alloy according to the invention is not an impurity.
- the zinc-chromium (Zn-Cr) coatings according to the invention having a chromium content greater than or equal to 3% by weight comprise at least one crystalline phase of the Cr-Zn-17 phase type, which in particular has a resistance to increased corrosion compared to a coating consisting only of zinc.
- the chromium (Cr) content varies from 20 to 30% by weight, relative to the total weight of the zinc-chromium alloy.
- the zinc-chromium coatings according to the invention having a chromium content ranging from 20 to 30% by weight, relative to the total weight of the zinc-chromium alloy (Zn-Cr), have the advantage of being particularly adherent. at the surface, coherent and homogeneous while having excellent anti-corrosion properties, in particular anti-corrosion properties equal to or greater than those of zinc-based coatings, in particular coatings based on zinc and nickel.
- the quality of the coating according to the invention is thus significantly improved, in particular in terms of adhesion, consistency and resistance to wear, for chromium contents ranging from 20 to 30% by weight, relative to the total weight. of the alloy, with respect to coatings based on zinc and chromium having a chromium content strictly less than 20% by weight ( ⁇ 20% by weight) or strictly greater than 30% by weight (>30% in weight).
- zinc-chromium (Zn-Cr) coatings having a chromium content ranging from 20 to 30% by weight comprise at least one Crystalline phase of the gamma phase type conferring an anticorrosion property five times greater than that of a coating consisting solely of zinc (i.e. a coating whose zinc content is 100% by weight relative to the total weight of the coating).
- this crystalline phase lies in the fact that it has a centered cubic structure and thus has certain elements of symmetry in common with the crystal lattice of the austenite of certain steels serving as a substrate, which promotes epitaxial growth and leads better adhesion of the coating to the substrate.
- the zinc-chromium coatings according to the invention having a chromium content ranging from 20 to 30% by weight exhibit better adhesion to the substrate than the coatings based on zinc and chromium having a chromium content strictly lower than 20%. by weight ( ⁇ 20% by weight) or strictly greater than 30% by weight (>30% by weight).
- the zinc-chromium (Zn-Cr) coatings according to the invention having a chromium content ranging from 20 to 30% by weight have a structure of better quality and increased toughness.
- zinc-chromium (Zn-Cr) coatings with a chromium content ranging from 20 to 30% by weight, relative to the total weight of the alloy, have anti-corrosion properties 14 times superior to those of a coating.
- the chromium (Cr) content varies from 25 to 30% by weight relative to the total weight of the zinc-chromium alloy.
- the zinc-chromium (Zn-Cr) coatings according to the invention having a chromium content ranging from 25 to 30% by weight relative to the total weight of the zinc-chromium alloy resist loads at least as high as the coatings based on zinc and nickel while having excellent anti-corrosion properties, especially in aggressive environments.
- the zinc-chromium coatings according to the invention having a chromium content ranging from 25 to 30% by weight relative to the total weight of the zinc-chromium alloy are more resistant to abrasion in the long term than coatings based on zinc and nickel while having excellent anti-corrosion properties.
- the chromium (Cr) content is 27% by weight relative to the total weight of the zinc-chromium alloy.
- the zinc (Zn) content varies from 70% to 80% by weight and the chromium (Cr) content varies from 20 to 30% by weight, relative to the total weight of the zinc alloy. -chromium.
- the layer comprising a zinc-chromium alloy is a layer consisting of a binary zinc-chromium alloy.
- the thread is coated with a layer consisting of a binary zinc-chromium alloy (Zn-Cr) of which zinc (Zn) is the major element by weight, relative to the total weight of the thread.
- Zn-Cr binary zinc-chromium alloy
- alloy and the chromium (Cr) content varies from 20 to 30% by weight relative to the total weight of the alloy.
- the layer comprising the zinc-chromium alloy (Zn-Cr) is electrolytically deposited.
- electrolytic deposition makes it possible to deposit zinc and chromium at very high current density on the substrate, in particular at a deposition rate of the order of 7 ⁇ m/min. This deposition rate is three times greater than that of the deposition of a layer consisting of an alloy of zinc and nickel.
- the layer comprising a zinc-chromium (Zn-Cr) alloy has a thickness ranging from 4 to 20 ⁇ m.
- a thickness makes it possible to apply the zinc-chromium layer more optimally on at least the threading of a threaded end of a tubular component.
- the deposition of the zinc-chromium (Zn-Cr) layer according to the invention is better distributed over the threading for thicknesses ranging from 4 to 20 ⁇ m providing improved protection in terms of corrosion and seizing.
- Such a thickness thus makes it possible to optimally match the geometry of the threads of the end of the tubular component.
- from 4 ⁇ m protection against corrosion is fully achieved, and up to 20 ⁇ m the layer remains dense without admitting any fragility. Beyond 20 ⁇ m, there is a risk of having a layer likely to be too thick for the machining clearance of the connection.
- the layer comprising a zinc-chromium alloy comprises a chromium content ranging from 20 to 30% by weight, preferably ranging from 25 to 30% by weight, relative to the total weight of the zinc alloy.
- -chromium and a thickness ranging from 4 to 20 ⁇ m, preferably ranging from 10 to 20 ⁇ m.
- Zinc-chromium (Zn-Cr) coatings having a chromium content ranging from 20 to 30% by weight, preferably ranging from 25 to 30% by weight, relative to the total weight of the alloy and whose thickness varies from 4 to 20 ⁇ m, preferably ranging from 10 to 20 ⁇ m, have the advantage of being optimally distributed on the thread and of being particularly adherent, homogeneous, coherent and resistant to wear while presenting excellent corrosion properties.
- the layer comprising a zinc-chromium alloy (Zn-Cr) is not coated with a passivation layer comprising trivalent chromium (Cr(III)).
- the zinc-chromium coating is advantageously not covered by a passivation layer comprising trivalent chromium (Cr(III)).
- the threaded end of the tubular component further comprises at least one non-threaded part coated with the layer comprising a zinc-chromium alloy (Zn-Cr) according to the invention.
- Zn-Cr zinc-chromium alloy
- the non-threaded part comprises a stopper.
- the non-threaded part comprises a sealing surface.
- the non-threaded part coated with the layer comprising a zinc-chromium alloy (Zn-Cr) according to the invention comprises a stop and/or a sealing surface.
- the threaded end of the tubular component is made of steel.
- the steel threaded end of the tubular component as described above comprises at least one thread extending on its outer or inner peripheral surface, the thread of which is coated with at least one layer comprising a zinc-chromium alloy (Zn -Cr) comprising a chromium content ranging from 20 to 30% by weight, preferably ranging from 25 to 30% by weight, relative to the total weight of the zinc-chromium alloy (Zn-Cr).
- Zn -Cr zinc-chromium alloy
- the steel threaded end of the tubular component as described above comprises at least one thread extending on its outer or inner peripheral surface, the thread of which is coated with at least one layer comprising a zinc-chromium alloy (Zn -Cr) comprising a chromium content ranging from 20 to 30% by weight, preferably ranging from 25 to 30% by weight, relative to the total weight of the zinc-chromium alloy, and a thickness ranging from 4 to 20 ⁇ m .
- Zn -Cr zinc-chromium alloy
- the surface of the thread and possibly of the non-threaded part, as defined above, coated with a zinc-chromium (Zn-Cr) coating according to the invention may have a surface roughness, in particular a surface roughness (Ra) ranging from 1.6 to 3.2 ⁇ m.
- the surface of the thread and of the non-threaded part preferably comprising an abutment and/or a sealing surface, coated with a zinc-chromium (Zn-Cr) coating according to the invention, can have a surface roughness, in particular a surface roughness (Ra) ranging from 1.6 to 3.2 ⁇ m.
- the surface roughness can be obtained by a sandblasting process.
- the surface of the thread, and possibly the surface of the non-threaded part can be treated beforehand by a mechanical treatment, preferably a sandblasting process.
- the roughness of the surface makes it possible to improve the adhesion of the zinc-chrome (Zn-Cr) coating as well as its resistance to wear.
- the surface of the thread, and optionally of the non-threaded part preferably comprising an abutment and/or a sealing surface is previously treated by a sandblasting process, and the zinc-chromium coating (Zn -Cr) comprises a chromium content ranging from 20 to 30% by weight and, preferably, a thickness ranging from 4 to 20 ⁇ m.
- the invention also relates to the use of a layer comprising a zinc-chromium (Zn-Cr) alloy, as defined above, to protect against corrosion and seizing at least one threaded end of a tubular component as defined previously.
- a layer comprising a zinc-chromium (Zn-Cr) alloy, as defined above, to protect against corrosion and seizing at least one threaded end of a tubular component as defined previously.
- the present invention also has as object and a process for preparing a threaded end, as defined above, of a tubular component intended for the drilling and/or the exploitation of a hydrocarbon well, for the transport of oil and gas, transport or storage of hydrogen, carbon capture or geothermal energy, comprising at least one electrolytic deposit on at least the surface of the thread of said end of an aqueous composition comprising one or more zinc salts, one or more chromium salts, one or more electrolytes and one or more surfactants, preferably nonionic.
- the method according to the invention makes it possible to lead to the deposition of a layer comprising at least one zinc-chromium alloy (Zn-Cr), as defined previously, homogeneous, compact and capable of being uniformly distributed over the threads of the threaded end.
- Zn-Cr zinc-chromium alloy
- the method according to the invention can also comprise a preparation of the surface to be coated, preferably by a mechanical treatment, more preferably a sandblasting process.
- the preparation of the surface to be coated by a mechanical treatment preferably a sandblasting process, makes it possible to improve the adhesion of the zinc-chromium (Zn-Cr) coating and minimizes the risks of fragile behavior of the coating.
- the method according to the invention may comprise a preparation of the surface of the thread and of a non-threaded part preferably comprising an abutment and/or a sealing surface, by a mechanical treatment, preferably by a sandblasting process.
- the method according to the invention may comprise sandblasting the surface to be coated of the threaded end, preferably sandblasting the surface of the thread and of a non-threaded part comprising a stop and/or a sealing range.
- the method according to the invention comprises sandblasting the surface to be coated and the electrolytic deposition of the aqueous composition previously defined on at least the sandblasted surface of the thread, preferably the sandblasted surface of the thread and of the part non-threaded preferably comprising a stopper and/or a sealing surface.
- the zinc-chromium coating obtained sports a surface having a homogeneous aesthetic appearance.
- the rate of deposition of the aqueous composition relative to the rate of deposition of the composition on the surface to be coated is between 4 to 20 ⁇ m/min, preferably 5 to 7 ⁇ m/min.
- Zinc salts and chromium salts are soluble in the aqueous composition.
- the chromium (Cr) salt(s) are salts of trivalent chromium Cr(III).
- the electrolytic deposition is carried out at a current density greater than at least 30 amperes/dm 2 .
- a sufficient agitation speed of the aqueous composition for example a speed of 0.23 m/s at the cathode, advantageously makes it possible to increase the current density without risking causing burn spots that risk causing a degradation of the appearance of the zinc-chromium (Zn-Cr) coating according to the invention.
- the electrolytic deposition is carried out at a current density ranging from 30 amperes/dm 2 to 50 amperes/dm 2 .
- the weight ratio between the chromium salt(s) and the zinc salt(s) varies from 0.8 to 1.4.
- the surfactant or surfactants are chosen from the group consisting of nonionic surfactants.
- the nonionic surfactant is chosen from the group consisting of (poly)alkoxylated fatty alcohols, in particular C8-C40 (poly)alkoxylated fatty alcohols, in particular poly(ethylene glycol) octyl ether, and oxirane, 2 -methyl, polymer with oxirane, mono 2-naphthaonyl ether.
- the presence of the surfactant in the aqueous composition makes it possible to deposit the chromium together with the zinc.
- the deposit obtained does not contain chromium. This is notably due to the formation of zinc hydroxides, resulting from the rise in pH at the cathode due to the release of dihydrogen, liable to block the diffusion of chromium towards the cathode. This absence of chromium deposition can also be explained by the existence of a shift in reduction potentials (chromium reduction potential becoming lower than that of zinc and/or water reduction potential).
- the presence of at least one surfactant thus makes it possible to facilitate the diffusion of the chromium in the diffusion layer and/or to reduce the cathodic overvoltage of the chromium and/or to increase the cathodic overvoltage of the electrolysis of the water, which minimizes the release of dihydrogen and the formation of zinc hydroxides.
- the surfactant is present in a concentration ranging from 0.3 to 3 mmol/L.
- the surfactant concentration makes it possible to modulate the shine of the zinc-chromium (Zn-Cr) coating according to the invention.
- the increase in the concentration of surfactant makes it possible to reinforce the shine of the zinc-chromium (Zn-Cr) coating according to the invention.
- the zinc salts can be chosen from zinc sulphate, zinc chloride, zinc sulfamate, preferably the zinc salt will be zinc sulphate.
- the chromium salts can be chosen according to the nature of the zinc salt. If the preference is zinc sulphate, then chromium sulphate will preferably be chosen.
- the conductive salts/carrier salts can be selected from the group consisting of sodium sulphate, potassium sulphate and ammonium sulphate and mixtures thereof, preferably sodium sulphate.
- the conductive salts/carrier salts ensure the electrical conductivity during the process.
- the aqueous composition further comprises one or more amino acids, preferably glycine.
- Glycine makes it possible to produce zinc-chrome (Zn-Cr) coatings according to the invention which are shiny, semi-shiny or matte.
- the glycine content in the aqueous composition can vary from 50 to 75 g/l relative to the total concentration of the composition.
- the glycine content makes it possible to modulate the matte appearance of the zinc-chromium (Zn-Cr) coating according to the invention.
- the zinc-chromium (Zn-Cr) coating has a matte appearance.
- the zinc-chromium (Zn-Cr) coating has a shiny appearance.
- the pH of the aqueous composition can vary from 1.5 to 3.5, preferably varies from 2 to 2.5.
- the pH of the aqueous composition is in particular greater than 3.5, the risks of precipitation of the chromium salts are increased in the bath, thus between 1.5 and 3.5 pH the risks are minimized.
- the process according to the invention is implemented at a temperature ranging from 35°C to 45°C. Below 35°C, the effectiveness of the composition may be insufficient and above 45°C, the chemical components may be degraded.
- the aqueous composition comprises:
- one or more conductive salts/support salts preferably sodium sulphate
- surfactants preferably nonionic
- the method according to the invention does not include an additional step of forming an anti-corrosion conversion layer of the passivation type comprising trivalent chromium (Cr(III)).
- the method according to the invention does not comprise a step of forming a passivation anti-corrosion conversion layer comprising trivalent chromium (Cr(III)) after the deposition of the layer comprising a zinc-chromium alloy.
- Another object of the invention is a tubular component for drilling and/or operating a hydrocarbon well, transporting oil and gas, transporting or storing hydrogen, capturing carbon or geothermal energy, comprising a threaded end according to the invention containing at least one thread extending on its outer or inner peripheral surface which is covered by a layer comprising a zinc-chromium alloy (Zn-Cr), in accordance with the invention, of which zinc (Zn) is the major element by weight, relative to the total weight of the alloy.
- Zn-Cr zinc-chromium alloy
- the threaded end is as previously defined.
- the layer comprising a zinc-chromium (Zn-Cr) alloy is as previously defined.
- the tubular component has improved resistance to corrosion and seizing.
- the tubular component is of the male type and comprises at least one thread extending over its outer peripheral surface.
- the tubular component is of the male type and comprises at least one thread extending over its outer peripheral surface and at least one non-threaded part, preferably chosen from a stop and/or a sealing surface.
- the tubular component is of the female type and comprises at least one thread extending over its inner peripheral surface.
- the tubular component is of the female type and comprises at least one thread extending over its inner peripheral surface and at least one non-threaded part, preferably chosen from a stop and/or a sealing surface.
- the tubular component is provided with an axis of revolution.
- the tubular component according to the invention is more particularly made of steel, and in particular of steel, the steels as described in the API 5CT standards, for example those comprising carbon in a proportion of less than 0.25%, and or preferably, steels with a grade as defi ned according to ISO standards! 1960 and ISO 13680, and or a carbon steel H40, J55, K55, M65, L80, C90, C95, T95, P I 10, Q 125, or a martensitic steel 13 Cr or S 13 Cr, or Duplex 22Cr + 25Cr , or Super-Duplex 25Cr, or austenitic Fe 27Cr.
- the invention also relates to the use of a tubular component as defined above for drilling and/or mining. of a hydrocarbon well, the transport of oil and gas, the transport or storage of hydrogen, carbon capture or geothermal energy.
- the invention relates to the use of the tubular component as defined above for drilling and/or operating a hydrocarbon well.
- the present invention also relates to a tubular threaded joint for drilling and/or operating a hydrocarbon well, transporting oil and gas, transporting or storing hydrogen, capturing carbon or geothermal energy, comprising a threaded end of a male-type tubular component having at least one thread extending over its outer peripheral surface and a threaded end of a female-type tubular component having at least one thread extending over its inner peripheral surface, screwed one into the other, at least one of said ends being as defined previously, in particular the threading of which is covered by a layer comprising a zinc-chromium (Zn-Cr) alloy such as previously defined.
- Zn-Cr zinc-chromium
- the tubular threaded joint according to the invention notably has better resistance to corrosion and seizing, including in aggressive environments as defined above.
- the two threaded ends are as defined above.
- the threaded end of the male-type tubular component has at least one thread, which extends over its outer peripheral surface, covered by a layer comprising a zinc-chromium (Zn-Cr) alloy according to the invention as described above.
- Zn-Cr zinc-chromium
- the threaded end of the female-type tubular component has at least one thread, which extends over its inner peripheral surface, covered by a layer comprising a zinc-chromium alloy (Zn-Cr) according to the invention as described above.
- Zn-Cr zinc-chromium alloy
- the threaded end of the male-type tubular component has at least one thread, which extends over its outer peripheral surface, covered by a layer comprising a zinc-chromium (Zn-Cr) alloy according to the invention
- the threaded end of the female-type tubular component has at least one thread, which extends on its inner peripheral surface, covered with a layer comprising a zinc-chromium alloy (Zn-Cr) according to the invention.
- the tubular threaded joint comprises a threaded end of a male-type tubular component having at least one thread extending on its outer peripheral surface and at least one non-threaded part selected from an abutment and/or a bearing surface. sealing with metal/metal interference, and a threaded end of a female-type tubular component having at least one thread extending on its inner peripheral surface and at least one non-threaded part selected from a stopper and/or a seat sealing with metal-to-metal interference; the threading and the non-threaded part being covered by a layer comprising a zinc-chromium (Zn-Cr) alloy according to the invention as described previously.
- Zn-Cr zinc-chromium
- FIG 1 is a schematic view of a joint resulting from the assembly by screwing of two tubular components.
- FIG 2 is an enlarged view of a boxed area A of Figure 1.
- FIG 3 is a detailed view of the cooperation between the threads of two assembled tubular components.
- FIG 4 is a detailed view of a connection element (thread) according to the invention covered with a zinc-chromium coating according to the invention.
- FIG 5 is a diagram comparing the time for appearance of a white rust layer of intensity 2 and intensity 3, after exposure to a salt spray test, on the surface of a zinc-nickel coating ( Zn—Ni) and the surface of a zinc-chromium (Zn—Cr) coating according to the invention.
- FIG 6 is a diagram comparing the total recovery time by a layer of white rust of intensity 2, after exposure to a salt spray test, of the surface of a zinc-nickel (Zn-Ni) coating and of the surface of a (Zn-Cr) coating according to the invention.
- the threaded joint represented in FIG. 1 comprises a first tubular component with an axis of revolution 9 and equipped with a male end 1 and a second tubular component with an axis of revolution 9 and equipped with a female end 2.
- two ends 1 and 2 each end in a terminal surface oriented radially with respect to the axis 9 of the threaded joint and are respectively provided with threaded portions 3 and 4 which cooperate with each other for the mutual assembly by screwing of the two components .
- the threaded portions 3 and 4 can be of the trapezoidal thread type or others.
- the threaded portions have vanishing profile threads at the respective ends of the threaded portions. These vanishing profiles extend over part of the axial extent of the threaded portion. In particular, part e of the threaded portion with vanishing profile 10 does not cooperate with a complementary thread.
- metal / metal sealing surfaces (seals) 5, 6 intended to be in leaktight clamping contact one against the other after assembly by screwing the two threaded components, are formed respectively on the male and female ends in the vicinity of the etched wire portions 3, 4.
- the male end 1 ends with a terminal surface 7 which comes into abutment against a corresponding surface 8 m formed on the female end 2 when the two ends are screwed into each other.
- the surfaces 7 and 8 are called abutments.
- FIG 3 the detail of a thread of a threaded portion is shown.
- Each thread thus comprises if a load flank 11 forming an angle 12 of between ⁇ 5° and +5° relative to the normal N of the axis 10 of connection.
- the load flank is connected by a vertex 13 to an assembly flank 14.
- the connection shown is such that in the final position of the assembly, the load flanks of the male threaded portion 3 are in contact with the corresponding load sides of the female threaded portion 4.
- a coating 15 as defined in the invention.
- a zinc-chromium coating comprising a zinc-chromium (Zn-Cr) alloy of which zinc (Zn) is the major element by weight, relative to the total weight of the alloy.
- the coating 15 comprises a chromium content ranging from 20 to 30% by weight, more preferably ranging from 25 to 30% by weight, and a zinc content ranging from 70 to 80% by weight, more preferably ranging from 70 75% by weight, relative to the total weight of the alloy.
- the zinc-chromium semi-gloss coating was obtained from an aqueous composition containing 75g/L of glycine.
- the zinc-chromium coating is compared to zinc-nickel (Zn-Ni) coatings, of which zinc is the major element by weight, comprising different weight contents of nickel ranging from 10 to 18% by weight.
- the percentage by weight is calculated relative to the total weight of the alloy.
- the coatings were subjected to tribological tests (scratch test and bowden test) in order to determine the critical load for which peeling of the coatings is observed (plastic deformation), the initial coefficient of friction as well as the number of cycles that the coatings are able to bear.
- the coatings were also subjected to a salt spray test to determine their anti-corrosion performance.
- the experimental conditions implement a tungsten carbide ball which is applied to the coatings and moved with an increasing load ranging from I ON to 260 N with a speed of movement of the ball of 4.20 mm/s, a duration of 2.38 seconds, a ball size of 5mm and a track length of 10mm.
- the coefficient of friction was measured from the frictional force and the pressure load at that time.
- the tungsten carbide ball is applied to the coatings and moved with a pressing load of 30 N and 100 N, with a ball moving speed of 4.20 mm/s, a duration of 2.38 seconds, a ball size of 5 mm and a track length of 10 mm.
- the initial coefficient of friction was determined in order to evaluate the lubricating properties of the coating.
- the number of cycles (number of passages of the ball over the surface) was measured for each coating to evaluate their resistance to abrasion.
- the zinc-chromium coating has an endurance at least as great as the zinc-nickel coatings for a load of 30N.
- the zinc-chromium coating according to the invention has better resistance to wear than the zinc-nickel coatings whose nickel content varies from 10 to 18% by weight.
- the zinc-chromium (Zn-Cr) coating according to the invention has improved endurance, i.e. therefore a superior wear resistance, compared to a zinc-nickel (Zn-Cr) coating. -Neither).
- the corrosion tests consisted of a neutral salt spray test carried out in a climatic chamber under the following conditions: 35°C with a saline solution at 50 g/L with a density between 1.029 and 1.036 at 25°C, with a pH between 6.5 and 7.2 at 25°C and recovered at an average rate of 1.5 ml/h.
- the appearance of red rust is evaluated by determining, in increasing order, the degree of rusting Re, which corresponds to the percentage of rusted surface in relation to the total surface.
- the degree of rusting in an increasing order from ReO to Re2 after exposure corresponds to the rusted surface compared to the total surface.
- Re2 0.5% total surface rusting
- Re6 40%-50% total surface rusting.
- Table 4 thus shows that the zinc-chromium (Zn-Cr) coatings exhibit performance that is at least as good with respect to the appearance of red rust as a zinc-nickel coating. Anti-corrosion performance - appearance of white rust
- the presence of white rust corresponds to the oxidation of the coating, in particular to the oxidation of zinc, and is evaluated by measuring, after exposure to salt spray, its time of appearance and its time of total covering of the surface of the coating. .
- the intensity of the layer of white rust covering the coatings is classified according to the following increasing order:
- Figure 5 compares the time of appearance of a layer of white rust of intensity 2 and intensity 3, after exposure to the salt spray test, on the surface of a zinc-nickel coating [Zn-Ni with 14 % by weight of nickel and a thickness of 10 ⁇ m] and the surface of a zinc-chromium coating [Zn-Cr with 27% by weight of chromium and a thickness of 5 ⁇ m],
- Figure 5 shows a rapid appearance of a layer of white rust of intensity 2 on the surface of the zinc-nickel coating [Zn-Ni with 14% by weight of nickel and a thickness of 10 ⁇ m], from 24 hours, while a layer of white rust of intensity 2 only appears after 170 hours on the surface of a zinc-chromium coating [Zn-Cr with 27% by weight of chromium and a thickness of 5 ⁇ m],
- Figure 5 also shows the rapid appearance of a layer of white rust of intensity 3 on the zinc-nickel coating [Zn-Ni with 14% by weight of nickel and a thickness of 10 ⁇ m], from 24 hours, while 'a layer of white rust of intensity 3 appears only at after 336 hours for a zinc-chromium coating [Zn-Cr with 27% by weight of chromium and a thickness of 5 ⁇ m].
- Figure 6 compares the total surface coverage time of a zinc-nickel coating [Zn-Ni with 14 wt% nickel and a thickness of 10 ⁇ m] and a zinc-chromium coating [Zn-Cr with 27 % by weight of chromium and a thickness of 5 pm] by a layer of white rust of intensity 2.
- Figure 6 shows that the total recovery time of the surface of the zinc-nickel coating [Zn-Ni with 14% nickel weight and a thickness of 10 ⁇ m] by a layer of white rust of intensity 2 is 24 hours while that this covering time by this same layer is 336 hours for a zinc-chromium coating [Zn-Cr with 27% by weight of chromium and a thickness of 5 ⁇ m].
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Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
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CA3232473A CA3232473A1 (fr) | 2021-10-07 | 2022-10-06 | Extremite filetee d'un composant tubulaire pourvue d'un revetement comprenant un alliage zinc-chrome |
CN202280071706.XA CN118159691A (zh) | 2021-10-07 | 2022-10-06 | 提供有包含锌-铬合金的涂层的管状部件的螺纹端部 |
EP22801383.5A EP4367298A1 (fr) | 2021-10-07 | 2022-10-06 | Extrémité filetée d'un composant tubulaire pourvue d'un revêtement comprenant un alliage zinc-chrome |
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FRFR2110615 | 2021-10-07 | ||
FR2110615A FR3127956B1 (fr) | 2021-10-07 | 2021-10-07 | Extrémité filetée d’un composant tubulaire pourvue d’un revêtement comprenant un alliage zinc-chrome |
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WO2023057594A1 true WO2023057594A1 (fr) | 2023-04-13 |
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PCT/EP2022/077856 WO2023057594A1 (fr) | 2021-10-07 | 2022-10-06 | Extrémité filetée d'un composant tubulaire pourvue d'un revêtement comprenant un alliage zinc-chrome |
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EP (1) | EP4367298A1 (fr) |
CN (1) | CN118159691A (fr) |
AR (1) | AR127310A1 (fr) |
CA (1) | CA3232473A1 (fr) |
FR (1) | FR3127956B1 (fr) |
WO (1) | WO2023057594A1 (fr) |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
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WO2017110686A1 (fr) * | 2015-12-25 | 2017-06-29 | 新日鐵住金株式会社 | Joint à vis pour tube et procédé de fabrication de celui-ci |
WO2019044961A1 (fr) * | 2017-09-04 | 2019-03-07 | 新日鐵住金株式会社 | Raccord fileté de tuyau, et procédé de fabrication de raccord fileté de tuyau |
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2021
- 2021-10-07 FR FR2110615A patent/FR3127956B1/fr active Active
-
2022
- 2022-10-06 EP EP22801383.5A patent/EP4367298A1/fr active Pending
- 2022-10-06 CA CA3232473A patent/CA3232473A1/fr active Pending
- 2022-10-06 CN CN202280071706.XA patent/CN118159691A/zh active Pending
- 2022-10-06 WO PCT/EP2022/077856 patent/WO2023057594A1/fr active Application Filing
- 2022-10-06 AR ARP220102739A patent/AR127310A1/es unknown
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
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WO2017110686A1 (fr) * | 2015-12-25 | 2017-06-29 | 新日鐵住金株式会社 | Joint à vis pour tube et procédé de fabrication de celui-ci |
WO2019044961A1 (fr) * | 2017-09-04 | 2019-03-07 | 新日鐵住金株式会社 | Raccord fileté de tuyau, et procédé de fabrication de raccord fileté de tuyau |
Also Published As
Publication number | Publication date |
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CN118159691A (zh) | 2024-06-07 |
FR3127956A1 (fr) | 2023-04-14 |
FR3127956B1 (fr) | 2024-05-31 |
AR127310A1 (es) | 2024-01-10 |
CA3232473A1 (fr) | 2023-04-13 |
EP4367298A1 (fr) | 2024-05-15 |
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