CN114807925A - Coating for titanium alloy and preparation method thereof - Google Patents

Coating for titanium alloy and preparation method thereof Download PDF

Info

Publication number
CN114807925A
CN114807925A CN202210390757.0A CN202210390757A CN114807925A CN 114807925 A CN114807925 A CN 114807925A CN 202210390757 A CN202210390757 A CN 202210390757A CN 114807925 A CN114807925 A CN 114807925A
Authority
CN
China
Prior art keywords
parts
titanium alloy
coating
raw material
sio
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202210390757.0A
Other languages
Chinese (zh)
Inventor
王刚
田瑞
尹立孟
姚宗湘
陈玉华
张鹤鹤
方乃文
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Chongqing University of Science and Technology
Original Assignee
Chongqing University of Science and Technology
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Chongqing University of Science and Technology filed Critical Chongqing University of Science and Technology
Priority to CN202210390757.0A priority Critical patent/CN114807925A/en
Publication of CN114807925A publication Critical patent/CN114807925A/en
Pending legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C24/00—Coating starting from inorganic powder
    • C23C24/08—Coating starting from inorganic powder by application of heat or pressure and heat
    • C23C24/10—Coating starting from inorganic powder by application of heat or pressure and heat with intermediate formation of a liquid phase in the layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K1/00—Soldering, e.g. brazing, or unsoldering
    • B23K1/008—Soldering within a furnace
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K1/00—Soldering, e.g. brazing, or unsoldering
    • B23K1/20—Preliminary treatment of work or areas to be soldered, e.g. in respect of a galvanic coating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K1/00—Soldering, e.g. brazing, or unsoldering
    • B23K1/20—Preliminary treatment of work or areas to be soldered, e.g. in respect of a galvanic coating
    • B23K1/206—Cleaning
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
    • C04B35/12—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on chromium oxide
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/62222—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products obtaining ceramic coatings
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3201—Alkali metal oxides or oxide-forming salts thereof
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3281—Copper oxides, cuprates or oxide-forming salts thereof, e.g. CuO or Cu2O
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3418—Silicon oxide, silicic acids, or oxide forming salts thereof, e.g. silica sol, fused silica, silica fume, cristobalite, quartz or flint
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3427—Silicates other than clay, e.g. water glass
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/38—Non-oxide ceramic constituents or additives
    • C04B2235/3817—Carbides
    • C04B2235/3839—Refractory metal carbides
    • C04B2235/3847—Tungsten carbides

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Structural Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Metallurgy (AREA)
  • Other Surface Treatments For Metallic Materials (AREA)

Abstract

The invention discloses a coating for titanium alloy and a preparation method thereof, wherein the coating comprises the following raw materials in parts by weight: SiO 2 2 20 to 40 parts of Cr 2 O 3 22 to 45 portions of Na 2 SiO 3 15-40 parts of CuCl, 15-40 parts of WC 4-10 parts of carboxymethyl cellulose and 1-2.5 parts of carboxymethyl cellulose. The preparation method comprises the following steps: (1) grinding the raw material mixture of the coating and then cleaning; (2) pretreating the surface of the titanium alloy, and then coating the raw material mixture on the surface of the titanium alloy; (3) and after the coating on the surface of the titanium alloy is dried, carrying out vacuum welding. The invention is to coat the raw materialThe titanium alloy obtained after the mixture is coated on the surface of the titanium alloy and vacuum welding has good hydrogen sulfide stress corrosion resistance and hardness, and can meet the industrial requirements.

Description

Coating for titanium alloy and preparation method thereof
Technical Field
The invention belongs to the technical field of alloy preparation, and particularly relates to a coating for a titanium alloy and a preparation method thereof.
Background
With the rapid development of Chinese economy, the demand of petroleum and natural gas is increasing day by day. The sulfur-containing gas fields in the widely distributed natural gas resources of China account for a considerable proportion, for example, Sichuan and Xinjiang Tarim blocks belong to high-sulfur-containing oil and gas fields. The exploration and development of highly corrosive gas fields is one of the major problems facing the natural gas industry. Domestic high content of H 2 S、CO 2 The corrosion protection problem of gas fields has been studied and technically challenged for many years, and various anticorrosion measures are taken, such as the adoption of low-alloy sulfur-resistant pipes, the injection of corrosion inhibitors, the anticorrosion coating of the inner wall of the pipe, the use of glass steel pipes, nickel-based alloy pipes and the like. Research shows that the high-temperature, high-pressure and high-H 2 S/CO 2 The oil casing pipe is mainly made of corrosion-resistant alloy in the exploration and development of oil and gas fields with partial pressure, high C1 and high organic sulfur.
Titanium is an important structural metal developed in the 50 s of the 20 th century, the reserves in the earth crust are abundant, the fourth place in the metal is, titanium and titanium alloy thereof have about 50 years from the realization of industrial production to the present, and the titanium and titanium alloy have a plurality of excellent properties. First, it has a low density and a high specific strength. The density of titanium was 4.5g/cm 3 Between aluminum and iron, while some titanium alloys have room temperature tensile strengths as high as 1400MPa (e.g., TB2) at temperatures in the range of-253 to 600C. Its specific strength (tensile strength/density) is almost highest in metallic materials. Secondly, it retains good plasticity at lower temperatures (-253' C). In addition, the titanium alloy has the characteristics of non-magnetism and small linear expansion coefficient, and the titanium alloy also has the advantages of high specific strength, large specific rigidity, good high-temperature resistance and corrosion resistance and excellent comprehensive mechanical properties. Due to the series of excellent characteristics, the material has shown strong industrial application value in a short time, and becomes an aeronautical and astronautic industry, an energy industry, a marine transportation industry,Chemical industry and medical care.
However, the corrosion performance of the titanium alloy material in the current market can not meet the requirements under severe working condition environments, and if a titanium alloy material with better corrosion resistance can be developed, the titanium alloy material plays an important role in further reducing the cost of the petroleum and natural gas industry.
Disclosure of Invention
The invention aims to provide a coating for a titanium alloy and a preparation method thereof, and the performance of the prepared titanium alloy can meet the requirement of a severe corrosion environment.
The patent CN110359075B provides a titanium alloy coating material, a preparation method and an application thereof, the invention forms a layer of compact TiO by anodic oxidation of titanium alloy 2 Oxide film on TiO 2 The titanium alloy coating material provided by the invention has improved corrosion resistance and binding force, but the titanium alloy material solves the problem of insufficient corrosion resistance of the bone implant material, and the corrosion performance of the titanium alloy coating material cannot meet the exploration and development requirements of a high-corrosion gas field.
Patent CN102876922B provides a high-strength high-toughness corrosion-resistant titanium alloy oil well pipe and a manufacturing method thereof, and the high-strength high-toughness corrosion-resistant titanium alloy oil well pipe comprises the following components in percentage by mass: al: 5-7, Nb: 2.0-3.0, Zr: 0.5 to 2.0, Mo: 0.7-1.2, Fe: 0.02-0.05, Si: 0.01-0.03, and the balance of Ti. The manufacturing method of the titanium alloy oil well pipe comprises the following steps: smelting in a vacuum furnace, forging into a round billet, heating in a ring furnace in a sectional manner, namely slowly heating to the temperature of 30-50 ℃ below a phase transformation point, keeping the temperature for 30-90min to reach a uniform temperature, and then quickly heating to 1000~
And (3) performing perforation at 1150 ℃ by adopting a lower deformation rate to obtain an intermediate pipe, performing annealing, performing cold rolling to obtain a finished pipe, wherein the titanium alloy oil well pipe subjected to final annealing treatment reaches the grade of 110-grade and 125-ksi steel, and a corrosion coupon test experiment shows that the corrosion rate is 0.007mm/a after 168-hour corrosion test.
With the increasing of the exploitation depth of oil wells, the geological environment is severe gradually, and the corrosion to oil well pipes is more and more serious, so that the development of an oil casing pipe titanium alloy material with excellent corrosion resistance becomes a technical problem to be solved urgently.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
the coating for the titanium alloy comprises the following raw materials in parts by weight: SiO 2 2 20 to 40 parts of Cr 2 O 3 22 to 45 portions of Na 2 SiO 3 15-40 parts of CuCl, 15-40 parts of WC 4-10 parts of carboxymethyl cellulose and 1-2.5 parts of carboxymethyl cellulose.
Further, the raw materials comprise the following components in parts by weight: SiO 2 2 25 parts of Cr 2 O 3 30 portions of Na 2 SiO 3 20 parts of CuCl 20 parts, 5 parts of WC and 1.5 parts of carboxymethyl cellulose.
The invention also provides a preparation method of the coating for the titanium alloy, which comprises the following steps:
(1) grinding the raw material mixture of the coating and then cleaning;
(2) pretreating the surface of the titanium alloy, and then coating the raw material mixture on the surface of the titanium alloy;
(3) and after the coating on the surface of the titanium alloy is dried, carrying out vacuum welding.
Further, in the step (1), the particle size of the ground raw material mixture is 200-300 meshes.
Further, in the step (1), washing is performed with an organic solvent.
Further, the organic solvent is a mixed solvent of acetone and benzene.
The surface of the titanium alloy is cleaned by the mixed solvent of acetone and benzene, so that the moisture, burrs, paint films, residual dirt and other impurities capable of reacting with the titanium alloy on the surface of the titanium alloy can be thoroughly removed.
Further, in the step (2), the pretreatment method comprises: and cleaning, sand blasting and polishing the surface of the titanium alloy.
Further, in the step (2), the painting method comprises the following steps: each layer is 0.4-0.6 mm thick, and each layer is slightly pressed until the total thickness is 2.5-3.5 mm.
Furthermore, the interval time of each brushing is 5-10 min.
Further, in the step (3), the vacuum welding conditions are as follows: vacuum degree of 3X 10 -3 Pa~4.5×10 -3 Pa, heating to 600-700 ℃ at the speed of 8-10 ℃/min, preserving heat for 25-35 min, heating to 850-900 ℃ at the speed of 10-15 ℃/min, and preserving heat for 40 min-1 h.
The invention has the following beneficial effects: according to the invention, the raw material mixture of the coating is coated on the surface of the titanium alloy and then vacuum welding is carried out, so that the obtained titanium alloy has better hydrogen sulfide stress corrosion resistance and hardness, and can meet the requirements of a severe corrosion environment.
Detailed Description
The technical solutions of the present invention are described clearly and completely below, and it is obvious that the described embodiments are some, not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The products used in the examples are all conventional products commercially available and can meet the selling standard unless otherwise specified. In the examples, unless otherwise specified, all methods used were conventional.
Example 1
(1) According to SiO 2 25 portions of Cr 2 O 3 30 portions of Na 2 SiO 3 Weighing the raw materials of the components by weight percent of 20 parts, 20 parts of CuCl, 5 parts of WC and 1.5 parts of carboxymethyl cellulose, grinding the weighed raw material mixture to the particle size of 200 meshes, and then cleaning the raw material mixture by using a mixed solution of acetone and benzene.
(2) Cleaning the titanium alloy surface, performing sand blasting, polishing, uniformly coating the prepared raw material mixture on the sand-blasted titanium alloy surface layer by layer, wherein the thickness of each layer is 0.6mm, each layer is slightly pressed until the total thickness is about 3mm, and the brushing interval time is 5-10 min each time.
(3) The coating to be brushed is volatilized and dried by adopting argon tungsten-arcWelding the titanium alloy coated with the coating in a vacuum brazing furnace, wherein the welding is set according to the specification: the vacuum degree in the heating process is 3.6 multiplied by 10 -3 Pa, heating to 600 ℃ at a speed of 10 ℃/min, preserving heat for 30min, heating to 850 ℃ at a speed of 15 ℃/min, preserving heat for 1h, and cooling along with the furnace.
Example 2
(1) According to SiO 2 20 portions of Cr 2 O 3 22 parts of Na 2 SiO 3 Weighing the raw materials of the components according to the weight percentage of 15 parts, 15 parts of CuCl, 4 parts of WC and 1 part of carboxymethyl cellulose, grinding the weighed raw material mixture to the particle size of 200 meshes, and then cleaning the raw material mixture by using a mixed solution of acetone and benzene.
(2) Cleaning the titanium alloy surface, performing sand blasting, polishing, uniformly coating the prepared raw material mixture on the sand-blasted titanium alloy surface layer by layer, wherein the thickness of each layer is 0.6mm, each layer is slightly pressed until the total thickness is about 3mm, and the brushing interval time is 5-10 min each time.
(3) And (3) putting the titanium alloy coated with the coating into a vacuum brazing furnace for welding by adopting argon tungsten-arc welding after the coating to be brushed is volatilized, wherein the welding specification is as follows: the vacuum degree in the heating process is 3.6 multiplied by 10 -3 Pa, heating to 600 ℃ at a speed of 10 ℃/min, preserving heat for 30min, heating to 850 ℃ at a speed of 15 ℃/min, preserving heat for 1h, and cooling along with the furnace.
Example 3
(1) According to SiO 2 40 portions of Cr 2 O 3 45 parts of Na 2 SiO 3 Weighing the raw materials of the components by weight percent of 40 parts, 40 parts of CuCl, 10 parts of WC and 2 parts of carboxymethyl cellulose, grinding the weighed raw material mixture to the particle size of 200 meshes, and then cleaning the raw material mixture by using a mixed solution of acetone and benzene.
(2) Cleaning the titanium alloy surface, performing sand blasting, polishing, uniformly coating the prepared raw material mixture on the sand-blasted titanium alloy surface layer by layer, wherein the thickness of each layer is 0.6mm, each layer is slightly pressed until the total thickness is about 3mm, and the brushing interval time is 5-10 min each time.
(3) The coating to be brushed is volatilized and dried by adopting argon tungsten-arc welding to carry out opposite coatingThe titanium alloy with the coating is put into a vacuum brazing furnace for welding, and the welding is set according to the specification: the vacuum degree in the heating process is 3.6 multiplied by 10 -3 Pa, heating to 600 ℃ at a speed of 10 ℃/min, preserving heat for 30min, heating to 850 ℃ at a speed of 15 ℃/min, preserving heat for 1h, and cooling along with the furnace.
Example 4
(1) According to SiO 2 25 parts of Cr 2 O 3 30 portions of Na 2 SiO 3 20 parts of CuCl 20 parts and WC5
Weighing raw materials of each component according to the weight percentage of 1.5 parts of carboxymethyl cellulose, grinding the weighed raw material mixture to the particle size of 200 meshes, and cleaning the raw material mixture by using a mixed solution of acetone and benzene.
(2) Cleaning the titanium alloy surface, performing sand blasting, polishing, uniformly coating the prepared raw material mixture on the sand-blasted titanium alloy surface layer by layer, wherein the thickness of each layer is 0.6mm, each layer is slightly pressed until the total thickness is about 3mm, and the brushing interval time is 5-10 min each time.
(3) And (3) putting the titanium alloy coated with the coating into a vacuum brazing furnace for welding by adopting argon tungsten-arc welding after the coating to be brushed is volatilized, wherein the welding specification is as follows: the vacuum degree in the heating process is 3.6 multiplied by 10 -3 Pa, heating to 650 ℃ at a speed of 10 ℃/min, preserving heat for 25min, heating to 850 ℃ at a speed of 15 ℃/min, preserving heat for 1h, and cooling along with the furnace.
Example 5
(1) According to SiO 2 25 portions of Cr 2 O 3 30 portions of Na 2 SiO 3 Weighing the raw materials of the components by weight percent of 20 parts, 20 parts of CuCl, 5 parts of WC and 1.5 parts of carboxymethyl cellulose, grinding the weighed raw material mixture to the particle size of 200 meshes, and then cleaning the raw material mixture by using a mixed solution of acetone and benzene.
(2) Cleaning the surface of the titanium alloy, then carrying out sandblasting, polishing, and then uniformly coating the prepared raw material mixture on the surface of the titanium alloy subjected to sandblasting layer by layer, wherein the thickness of each layer is 0.6mm, each layer is slightly pressed until the total thickness is about 3mm, and the brushing interval time is 5-10 min each time.
(3) The coating to be brushed is volatilizedAnd (3) placing the titanium alloy coated with the coating into a vacuum brazing furnace for welding by adopting argon tungsten-arc welding, wherein the welding is set according to the specification: the vacuum degree in the heating process is 3.6 multiplied by 10 -3 Pa, heating to 600 ℃ at the speed of 8 ℃/min, preserving heat for 30min, heating to 850 ℃ at the speed of 10 ℃/min, preserving heat for 1h, and cooling along with the furnace.
Example 6
(1) According to SiO 2 25 portions of Cr 2 O 3 30 portions of Na 2 SiO 3 Weighing the raw materials of the components by weight percent of 20 parts, 20 parts of CuCl, 5 parts of WC and 1.5 parts of carboxymethyl cellulose, grinding the weighed raw material mixture to the particle size of 200 meshes, and then cleaning the raw material mixture by using a mixed solution of acetone and benzene.
(2) Cleaning the titanium alloy surface, performing sand blasting, polishing, uniformly coating the prepared raw material mixture on the sand-blasted titanium alloy surface layer by layer, wherein the thickness of each layer is 0.6mm, each layer is slightly pressed until the total thickness is about 3mm, and the brushing interval time is 5-10 min each time.
(3) And (3) putting the titanium alloy coated with the coating into a vacuum brazing furnace for welding by adopting argon tungsten-arc welding after the coating to be brushed is volatilized, wherein the welding specification is as follows: the vacuum degree in the heating process is 3.6 multiplied by 10 -3 Pa, heating to 700 ℃ at a speed of 10 ℃/min, preserving heat for 30min, heating to 900 ℃ at a speed of 15 ℃/min, preserving heat for 40min, and cooling along with the furnace.
Example 7
(1) According to SiO 2 35 parts of Cr 2 O 3 25 portions of Na 2 SiO 3 Weighing the raw materials of the components by weight percent of 30 parts, 25 parts of CuCl, 7 parts of WC and 2.5 parts of carboxymethyl cellulose, grinding the weighed raw material mixture to the particle size of 200 meshes, and then cleaning the raw material mixture by using a mixed solution of acetone and benzene.
(2) Cleaning the titanium alloy surface, performing sand blasting, polishing, uniformly coating the prepared raw material mixture on the sand-blasted titanium alloy surface layer by layer, wherein the thickness of each layer is 0.6mm, each layer is slightly pressed until the total thickness is about 3mm, and the brushing interval time is 5-10 min each time.
(3) Volatilizing and dry-extracting coating to be brushedAnd (3) putting the titanium alloy coated with the coating into a vacuum brazing furnace for welding by using argon tungsten-arc welding, wherein the welding specification is as follows: the vacuum degree in the heating process is 3.6 multiplied by 10 -3 Pa, heating to 700 ℃ at a speed of 10 ℃/min, preserving heat for 30min, heating to 900 ℃ at a speed of 15 ℃/min, preserving heat for 40min, and cooling along with the furnace.
Example 8
(1) According to SiO 2 25 portions of Cr 2 O 3 30 portions of Na 2 SiO 3 Weighing the raw materials of the components by weight percent of 20 parts, 20 parts of CuCl, 5 parts of WC and 1.5 parts of carboxymethyl cellulose, grinding the weighed raw material mixture to the particle size of 200 meshes, and then cleaning the raw material mixture by using a mixed solution of acetone and benzene.
(2) Cleaning the surface of the titanium alloy, then carrying out sandblasting, polishing, and then uniformly coating the prepared raw material mixture on the surface of the titanium alloy subjected to sandblasting layer by layer, wherein the thickness of each layer is 0.6mm, each layer is slightly pressed until the total thickness is about 3mm, and the brushing interval time is 5-10 min each time.
(3) And (3) putting the titanium alloy coated with the coating into a vacuum brazing furnace for welding by adopting argon tungsten-arc welding after the coating to be brushed is volatilized, wherein the welding specification is as follows: the vacuum degree in the heating process is 3.2 multiplied by 10 -3 Pa, heating to 620 ℃ at the speed of 9 ℃/min, preserving heat for 30min, heating to 880 ℃ at the speed of 15 ℃/min, preserving heat for 40min, and cooling along with the furnace.
Example 9
(1) According to SiO 2 25 portions of Cr 2 O 3 30 portions of Na 2 SiO 3 Weighing the raw materials of the components by weight percent of 20 parts, 20 parts of CuCl, 5 parts of WC and 1.5 parts of carboxymethyl cellulose, grinding the weighed raw material mixture to the particle size of 200 meshes, and then cleaning the raw material mixture by using a mixed solution of acetone and benzene.
(2) Cleaning the titanium alloy surface, performing sand blasting, polishing, uniformly coating the prepared raw material mixture on the sand-blasted titanium alloy surface layer by layer, wherein the thickness of each layer is 0.6mm, each layer is slightly pressed until the total thickness is about 3mm, and the brushing interval time is 5-10 min each time.
(3) Volatilizing and dry-extracting coating to be brushedAnd (3) putting the titanium alloy coated with the coating into a vacuum brazing furnace for welding by using argon tungsten-arc welding, wherein the welding specification is as follows: the vacuum degree in the heating process is 4 multiplied by 10 -3 Pa, heating to 700 ℃ at a speed of 10 ℃/min, preserving heat for 30min, heating to 900 ℃ at a speed of 15 ℃/min, preserving heat for 40min, and cooling along with the furnace.
Example 10
(1) According to SiO 2 25 portions of Cr 2 O 3 30 portions of Na 2 SiO 3 Weighing the raw materials of the components by weight percent of 20 parts, 20 parts of CuCl, 5 parts of WC and 1.5 parts of carboxymethyl cellulose, grinding the weighed raw material mixture to the particle size of 200 meshes, and then cleaning the raw material mixture by using a mixed solution of acetone and benzene.
(2) Cleaning the titanium alloy surface, performing sand blasting, polishing, uniformly coating the prepared raw material mixture on the sand-blasted titanium alloy surface layer by layer, wherein the thickness of each layer is 0.6mm, each layer is slightly pressed until the total thickness is about 3mm, and the brushing interval time is 5-10 min each time.
(3) And (3) putting the titanium alloy coated with the coating into a vacuum brazing furnace for welding by adopting argon tungsten-arc welding after the coating to be brushed is volatilized, wherein the welding specification is as follows: the vacuum degree in the heating process is 4.5 multiplied by 10 -3 Pa, heating to 700 ℃ at a speed of 10 ℃/min, preserving heat for 35min, heating to 850 ℃ at a speed of 15 ℃/min, preserving heat for 1h, and cooling along with the furnace.
Example 11
(1) According to SiO 2 25 portions of Cr 2 O 3 30 portions of Na 2 SiO 3 Weighing the raw materials of the components by weight percent of 20 parts, 20 parts of CuCl, 5 parts of WC and 1.5 parts of carboxymethyl cellulose, grinding the weighed raw material mixture to the particle size of 200 meshes, and then cleaning the raw material mixture by using a mixed solution of acetone and benzene.
(2) Cleaning the surface of the titanium alloy, performing sand blasting, and polishing the surface of the titanium alloy by using the prepared raw materials
Uniformly coating the mixture on the surface of the titanium alloy subjected to sand blasting layer by layer, wherein the thickness of each layer is 0.6mm, each layer is slightly pressed until the total thickness is about 3mm, and the interval time between each coating is 5-10 min.
（3）And (3) putting the titanium alloy coated with the coating into a vacuum brazing furnace for welding by adopting argon tungsten-arc welding after the coating to be brushed is volatilized, wherein the welding specification is as follows: the vacuum degree in the heating process is 3.6 multiplied by 10 -3 Pa, heating to 700 ℃ at a speed of 12 ℃/min, preserving heat for 27min, heating to 850 ℃ at a speed of 12 ℃/min, preserving heat for 50min, and cooling along with the furnace.
Comparative example 1
The titanium alloy coating material was different from that of example 1.
(1) According to SiO 2 25 portions of Cr 2 O 3 30 parts of NaF20 parts of MgF 20 parts of TiO 2 5 parts of Ta 2 O 5 1.5 parts by weight of each component raw material, grinding the weighed raw material mixture to a particle size of 200 mesh, and washing the raw material mixture with a mixed solution of acetone and benzene.
(2) Cleaning the titanium alloy surface, performing sand blasting, polishing, uniformly coating the prepared raw material mixture on the sand-blasted titanium alloy surface layer by layer, wherein the thickness of each layer is 0.6mm, each layer is slightly pressed until the total thickness is about 3mm, and the brushing interval time is 5-10 min each time.
(3) And (3) putting the titanium alloy coated with the coating into a vacuum brazing furnace for welding by adopting argon tungsten-arc welding after the coating to be brushed is volatilized, wherein the welding specification is as follows: the vacuum degree in the heating process is 3.6 multiplied by 10 -3 Pa, heating to 600 ℃ at a speed of 10 ℃/min, preserving heat for 30min, heating to 850 ℃ at a speed of 15 ℃/min, preserving heat for 1h, and cooling along with the furnace.
Comparative example 2
The titanium alloy coating raw material composition was reduced compared to example 1.
(1) According to SiO 2 31.5 parts of Cr 2 O 3 30 portions of Na 2 SiO 3 Weighing the raw materials of each component according to the weight percentage of 20 parts and 20 parts of CuCl, grinding the weighed raw material mixture to the particle size of 200 meshes, and then cleaning the raw material mixture by using a mixed solution of acetone and benzene.
(2) Cleaning the titanium alloy surface, performing sand blasting, polishing, uniformly coating the prepared raw material mixture on the sand-blasted titanium alloy surface layer by layer, wherein the thickness of each layer is 0.6mm, each layer is slightly pressed until the total thickness is about 3mm, and the brushing interval time is 5-10 min each time.
(3) And (3) putting the titanium alloy coated with the coating into a vacuum brazing furnace for welding by adopting argon tungsten-arc welding after the coating to be brushed is volatilized, wherein the welding specification is as follows: the vacuum degree in the heating process is 3.6 multiplied by 10 -3 Pa, heating to 600 ℃ at a speed of 10 ℃/min, preserving heat for 30min, heating to 850 ℃ at a speed of 15 ℃/min, preserving heat for 1h, and cooling along with the furnace.
Comparative example 3
The vacuum welding temperature rise procedure was different compared to example 1.
(1) According to SiO 2 25 portions of Cr 2 O 3 30 portions of Na 2 SiO 3 Weighing the raw materials of the components by weight percent of 20 parts, 20 parts of CuCl, 5 parts of WC and 1.5 parts of carboxymethyl cellulose, grinding the weighed raw material mixture to the particle size of 200 meshes, and then cleaning the raw material mixture by using a mixed solution of acetone and benzene.
(2) Cleaning the titanium alloy surface, performing sand blasting, polishing, uniformly coating the prepared raw material mixture on the sand-blasted titanium alloy surface layer by layer, wherein the thickness of each layer is 0.6mm, each layer is slightly pressed until the total thickness is about 3mm, and the brushing interval time is 5-10 min each time.
(3) Putting the titanium alloy coated with the coating into a vacuum brazing rod by argon tungsten-arc welding after the coating to be brushed is volatilized
Welding furnace welding, the welding is standardized and is set up: the vacuum degree in the heating process is 3.6 multiplied by 10 -3 Pa, heating to 850 ℃ at a speed of 10 ℃/min, preserving heat for 1.5h, and cooling along with the furnace.
Comparative example 4
The vacuum welding temperature rise procedure was different compared to example 1.
(1) According to SiO 2 25 portions of Cr 2 O 3 30 portions of Na 2 SiO 3 Weighing the raw materials of the components by weight percent of 20 parts, 20 parts of CuCl, 5 parts of WC and 1.5 parts of carboxymethyl cellulose, grinding the weighed raw material mixture to the particle size of 200 meshes, and then cleaning the raw material mixture by using a mixed solution of acetone and benzene.
(2) Cleaning the titanium alloy surface, performing sand blasting, polishing, uniformly coating the prepared raw material mixture on the sand-blasted titanium alloy surface layer by layer, wherein the thickness of each layer is 0.6mm, each layer is slightly pressed until the total thickness is about 3mm, and the brushing interval time is 5-10 min each time.
(3) And (3) putting the titanium alloy coated with the coating into a vacuum brazing furnace for welding by adopting argon tungsten-arc welding after the coating to be brushed is volatilized, wherein the welding specification is as follows: the vacuum degree in the heating process is 3.6 multiplied by 10 -3 Pa, heating to 900 ℃ at the speed of 7 ℃/min, preserving heat for 1h, and cooling along with the furnace.
Table 1 shows the comparison of the mechanical properties of the titanium alloys of examples 1 to 11 of the present invention and comparative examples 1 to 4.
Hydrogen sulfide stress corrosion performance: test experiment temperature of corrosion coupon is 160 ℃, H 2 The S partial pressure is 5MPa, the CO2 partial pressure is 11MPa, the NaCl concentration is 100000ppm Cl, the elemental sulfur is added for 3g/L, the pH value is 3, and the rotating speed is 3 m/S. After 168 hours of corrosion testing, the corrosion rate was calculated.
TABLE 1
Figure 665264DEST_PATH_IMAGE002
It can be seen that the titanium alloy of the examples of the present invention has better corrosion resistance and hardness than those of the comparative examples.
To further verify the corrosion resistance of the titanium alloy material of the present invention, the titanium alloy material of example 1 was subjected to a corrosion resistance test at 160 ℃ in accordance with NACE TM0177A for hydrogen sulfide stress corrosion resistance 2 S partial pressure 5MPa, CO 2 The partial pressure 11MPa, NaCl concentration 100000ppm Cl, added elemental sulphur 3g/L, pH 3, under 110ksi 90% load for 720h corrosion test, test sample crack-free.
Hydrogen sulfide stress corrosion resistance test was carried out according to NACE TM0177B method ASTM G39 standard using four-point bending test specimens at a test temperature of 160 ℃ and H 2 S partial pressure 5MPa, CO 2 11MPa of partial pressure, 100000ppm Cl of NaCl, 3g/L of elemental sulfur, pH 3, 720 hours of corrosion test at 110ksi 100% loadNo pitting corrosion, no crack after the test, no pitting corrosion after the crack test, and no corrosion of the crack.
The C-Ring test was performed according to the procedure given in NACE TM177-2005 and ASTM G38-01. Experiment temperature 160 ℃, H 2 S partial pressure 5MPa, CO 2 The partial pressure is 11MPa, the NaCl concentration is 100000ppm Cl, 3g/L of elemental sulfur is added, the pH value is 3, a sample applies tension to the Actual Yield Strength (AYS) of the material by using a strain gauge, and the pitting corrosion and the corrosion cracking are avoided after 720-hour corrosion test.
As can be seen from the experiments, the titanium alloy material has excellent corrosion resistance.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (10)

1. The coating for the titanium alloy is characterized by comprising the following raw materials in parts by weight: SiO 2 2 20 to 40 parts of Cr 2 O 3 22-45 parts of Na 2 SiO 3 15-40 parts of CuCl, 15-40 parts of WC 4-10 parts of carboxymethyl cellulose and 1-2.5 parts of carboxymethyl cellulose.
2. The coating for titanium alloy according to claim 1, wherein the raw material comprises the following components in parts by weight: SiO 2 2 25 portions of Cr 2 O 3 30 portions of Na 2 SiO 3 20 parts of CuCl 20 parts, 5 parts of WC and 1.5 parts of carboxymethyl cellulose.
3. A preparation method of a coating for titanium alloy is characterized by comprising the following steps:
(1) grinding the raw material mixture of the coating of claim 1 or 2 and then washing;
(2) pretreating the surface of the titanium alloy, and then coating the raw material mixture on the surface of the titanium alloy;
(3) and after the coating on the surface of the titanium alloy is dried, carrying out vacuum welding.
4. The preparation method according to claim 3, wherein in the step (1), the particle size of the ground raw material mixture is 200-300 meshes.
5. The production method according to claim 3, wherein in the step (1), washing is performed with an organic solvent.
6. The method according to claim 5, wherein the organic solvent is a mixed solvent of acetone and benzene.
7. The method according to claim 3, wherein in the step (2), the pretreatment is carried out by: and cleaning, sandblasting and polishing the surface of the titanium alloy.
8. The method according to claim 3, wherein in the step (2), the painting method comprises: each layer is 0.4-0.6 mm thick, and each layer is slightly pressed until the total thickness is 2.5-3.5 mm.
9. The method according to claim 8, wherein the interval between brushing is 5-10 min.
10. The production method according to claim 3, wherein in the step (3), the vacuum welding conditions are: vacuum degree of 3X 10 -3 Pa~4.5×10 -3 And Pa, heating to 600-700 ℃ at the speed of 8-10 ℃/min, preserving heat for 25-35 min, heating to 850-900 ℃ at the speed of 10-15 ℃/min, and preserving heat for 40 min-1 h.
CN202210390757.0A 2022-04-14 2022-04-14 Coating for titanium alloy and preparation method thereof Pending CN114807925A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210390757.0A CN114807925A (en) 2022-04-14 2022-04-14 Coating for titanium alloy and preparation method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210390757.0A CN114807925A (en) 2022-04-14 2022-04-14 Coating for titanium alloy and preparation method thereof

Publications (1)

Publication Number Publication Date
CN114807925A true CN114807925A (en) 2022-07-29

Family

ID=82536123

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202210390757.0A Pending CN114807925A (en) 2022-04-14 2022-04-14 Coating for titanium alloy and preparation method thereof

Country Status (1)

Country Link
CN (1) CN114807925A (en)

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3450189A (en) * 1966-08-22 1969-06-17 Int Nickel Co Process of coating metal castings
CN1643182A (en) * 2002-04-09 2005-07-20 奥托库姆普联合股份公司 Method for preparing patination materials and patination material
CN101555167A (en) * 2009-05-19 2009-10-14 北京科技大学 Method for preparing ceramic coating by pressurizing and microwave-sintering
CN103111726A (en) * 2013-02-03 2013-05-22 马丁青 Plating laser pretreatment impulse welding method of titanium alloy plate and pure aluminum plate
CN103418316A (en) * 2010-01-29 2013-12-04 张颖 Preparation method of modified micro-granules
CN104313446A (en) * 2014-09-30 2015-01-28 苏州博利迈新材料科技有限公司 Wear-resistant ceramic coating material and preparation method thereof
CN104476015A (en) * 2014-10-31 2015-04-01 天津市宏远钛铁有限公司 Titanium alloy solder and soldering method thereof
CN105887078A (en) * 2015-04-11 2016-08-24 鹤壁汽车工程职业学院 Anti-abrasion and anti-corrosion coating preparation method for roller
CN106148873A (en) * 2016-07-26 2016-11-23 河北工业大学 Titanium alloy and the preparation method of Intermatallic Ti-Al compound oxide on surface base coating
CN107601882A (en) * 2017-10-26 2018-01-19 四川工程职业技术学院 A kind of titanium alloy enamel coating and preparation method thereof
US20190263714A1 (en) * 2018-02-27 2019-08-29 Zyp Coatings, Inc. Flexible ceramic coatings for metals and methods of making same
CN114717497A (en) * 2022-04-21 2022-07-08 重庆科技学院 Welding process of titanium alloy part

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3450189A (en) * 1966-08-22 1969-06-17 Int Nickel Co Process of coating metal castings
CN1643182A (en) * 2002-04-09 2005-07-20 奥托库姆普联合股份公司 Method for preparing patination materials and patination material
CN101555167A (en) * 2009-05-19 2009-10-14 北京科技大学 Method for preparing ceramic coating by pressurizing and microwave-sintering
CN103418316A (en) * 2010-01-29 2013-12-04 张颖 Preparation method of modified micro-granules
CN103111726A (en) * 2013-02-03 2013-05-22 马丁青 Plating laser pretreatment impulse welding method of titanium alloy plate and pure aluminum plate
CN104313446A (en) * 2014-09-30 2015-01-28 苏州博利迈新材料科技有限公司 Wear-resistant ceramic coating material and preparation method thereof
CN104476015A (en) * 2014-10-31 2015-04-01 天津市宏远钛铁有限公司 Titanium alloy solder and soldering method thereof
CN105887078A (en) * 2015-04-11 2016-08-24 鹤壁汽车工程职业学院 Anti-abrasion and anti-corrosion coating preparation method for roller
CN106148873A (en) * 2016-07-26 2016-11-23 河北工业大学 Titanium alloy and the preparation method of Intermatallic Ti-Al compound oxide on surface base coating
CN107601882A (en) * 2017-10-26 2018-01-19 四川工程职业技术学院 A kind of titanium alloy enamel coating and preparation method thereof
US20190263714A1 (en) * 2018-02-27 2019-08-29 Zyp Coatings, Inc. Flexible ceramic coatings for metals and methods of making same
CN114717497A (en) * 2022-04-21 2022-07-08 重庆科技学院 Welding process of titanium alloy part

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
"《国外冶金 国外钛及钛合金》", 上海科学技术出版社, pages: 103 - 104 *
田锦;刘金合;: "钛合金活性剂激光焊接的初步研究", no. 05 *

Similar Documents

Publication Publication Date Title
CN102876922B (en) High-strength, high-toughness and corrosive environment resistant titanium alloy oil well pipe and manufacturing method thereof
CN108467969B (en) High-corrosion-resistance titanium alloy pipe for oil and gas development and preparation method thereof
JPS6389637A (en) Corrosion resistant high strength nickel base alloy
CN110423981B (en) Permeation-aid agent for zinc-aluminum-magnesium mechanical energy permeation aid and using method thereof
CN109706344B (en) High-strength and high-toughness titanium alloy pipe for oil and gas development and preparation method thereof
JPS6134498B2 (en)
CN110004392B (en) High-temperature corrosion-resistant wear-resistant amorphous thermal spraying material
CN108728793A (en) A kind of tough anti-corrosion CrAlN/Cr2AlC multilayer coatings and preparation method thereof
CN111500897A (en) High-strength oxidation-resistant corrosion-resistant nickel-chromium electrothermal alloy and processing method thereof
CN109487175B (en) High-strength corrosion-resistant sucker rod and preparation process thereof
WO2022057084A2 (en) High-strength anti-oxidation corrosion-resistant nickel chromium electrothermal alloy and processing method therefor
Patel A century of discoveries, inventors, and new nickel alloys
EP3502313B1 (en) Method for preparing an anti-coking crystalline material based on a stainless steel surface
CN113523166A (en) Production process of 25% Cr large-wall-thickness super binocular stainless steel forging for deep sea connector
CN114150184A (en) Low-stress corrosion-sensitivity high-strength corrosion-resistant Zr702L alloy
CN113981328B (en) Aluminum-containing austenitic stainless steel with surface spontaneously and continuously generating aluminum oxide film and preparation method thereof
EP2149617B1 (en) Method and article for improved adhesion of fatigue-prone components
JPS604902B2 (en) Metal substrate with adhesive anti-corrosion coating and method for manufacturing the same
CN114807925A (en) Coating for titanium alloy and preparation method thereof
CN107297450B (en) A kind of upset method of high-strength tenacity titanium alloy drilling rod material
US11459659B2 (en) Nanocrystalline material based on stainless steel surface, and preparation method therefor
CN111926284B (en) Steam turbine high-medium pressure inner cylinder steam oxidation resistant coating and preparation method thereof
JP3367086B2 (en) Alloy steel with excellent corrosion resistance to molten salts containing alkali metal oxides
Barteri et al. Microstructural study and corrosion performance of duplex and superaustenitic steels in sour well environment
CN112609142B (en) Anticorrosive wear-resistant composite coating on surface of sucker rod and preparation method thereof

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
RJ01 Rejection of invention patent application after publication
RJ01 Rejection of invention patent application after publication

Application publication date: 20220729