WO2008144989A1 - Tube électrophorétique en acier, son procédé électrophorétique de finition et équipement complet - Google Patents

Tube électrophorétique en acier, son procédé électrophorétique de finition et équipement complet Download PDF

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Publication number
WO2008144989A1
WO2008144989A1 PCT/CN2007/070945 CN2007070945W WO2008144989A1 WO 2008144989 A1 WO2008144989 A1 WO 2008144989A1 CN 2007070945 W CN2007070945 W CN 2007070945W WO 2008144989 A1 WO2008144989 A1 WO 2008144989A1
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WO
WIPO (PCT)
Prior art keywords
electrophoresis
steel pipe
electrophoretic
electrophoretic coating
workpiece
Prior art date
Application number
PCT/CN2007/070945
Other languages
English (en)
Chinese (zh)
Inventor
Zailiang Li
Original Assignee
Wuhan Lisheng Super Filtration Science And Technology Ltd.
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 Wuhan Lisheng Super Filtration Science And Technology Ltd. filed Critical Wuhan Lisheng Super Filtration Science And Technology Ltd.
Publication of WO2008144989A1 publication Critical patent/WO2008144989A1/fr

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D13/00—Electrophoretic coating characterised by the process
    • C25D13/12—Electrophoretic coating characterised by the process characterised by the article coated
    • C25D13/14—Tubes; Rings; Hollow bodies

Definitions

  • Electrophoretic coating method and complete equipment for electrophoresis steel tube and electrophoresis steel tube are Electrophoretic coating method and complete equipment for electrophoresis steel tube and electrophoresis steel tube
  • the invention relates to a steel pipe and a production method and equipment thereof, in particular to an electrophoretic coating technology and a complete set of equipment for electrophoresis steel pipe and electrophoresis steel pipe.
  • Pipeline transportation is one of the five major modes of transportation today, and it has become the main transportation tool for oil and gas.
  • the total length of the world's oil and gas pipelines is about 2 million km.
  • the total length of our long-distance pipelines is about 20,000 km.
  • the national key project "West-to-East Gas Emission" project has a total length of 4167km, and its main pipeline investment is 38.4 billion yuan.
  • the city's pipe network investment will exceed 100 billion yuan.
  • pipes for pipeline transportation generally use metal steel pipes and plastic rubber pipes.
  • the metal steel pipes have the advantages of high strength and are suitable for long-distance transportation, but they have the disadvantage of poor corrosion resistance; plastic rubber pipes have the advantages of high corrosion resistance, but It has the disadvantage of low strength and is only suitable for short distance transport. Therefore, solving the corrosion protection problem of steel pipes is an important issue faced by those skilled in the art.
  • galvanized steel pipes are generally used for galvanized steel pipes or anti-corrosion coatings are applied to ordinary steel pipes for anti-corrosion purposes.
  • the disadvantage of this method is that the galvanized layer of the galvanized steel pipe is susceptible to oxidative corrosion and spalling, and can cause secondary pollution, and the country is gradually banned from use.
  • Ordinary steel pipes coated with anti-corrosion coatings also have the defects that the anti-corrosion layer is easily aged and peeled off, resulting in a short service life.
  • the electrophoretic coating technology mainly adopts an ordinary electrophoresis treatment method, and the electrophoresis process generally has a simple workpiece structure and a relatively easy to paint workpiece, but due to the influence of the electrophoretic coating of the electrophoretic coating and the influence of the conductive efficiency, the tubular metal is applied.
  • the internal anti-corrosion treatment of pieces such as iron pipes, galvanized pipes, steel pipes and other metal conductors
  • the corrosion treatment of specially treated non-metallic conductive members cannot be treated by conventional electrophoresis techniques, and other treatment methods are also
  • the anti-corrosion problem of the inner and outer walls of such components cannot be better solved.
  • the object of the present invention is to provide an electrophoretic coating technology and a complete set of equipment for electrophoresis steel pipe and electrophoresis steel pipe, which solves the electrophoresis problem of the inner and outer walls of the metal steel pipe, thereby completely solving the inside of the metal steel pipe. , the anti-corrosion problem of the outer wall.
  • the object of the present invention is achieved by the following technical solutions: It comprises a steel pipe, characterized in that: an electrophoretic coating is electrophoresed on both the inner and outer walls of the steel pipe.
  • the steel pipe is an iron pipe, a galvanized steel pipe or a plastic galvanized steel pipe;
  • the electrophoretic coating comprises a thermosetting coating or a photosensitive coating; and the electrophoretic coating comprises one of a dye, a pigment, a filler or an auxiliary agent.
  • electrophoretic coating comprising colorless transparent, matte colorless, black, gray, white, red, yellow, green, blue, and flash or pearlescent electrophoretic coating;
  • the electrophoretic coating is specifically one or more of a polybutadiene resin, a phenol resin, an epoxy resin, an acrylic resin or a polyurethane.
  • the electrophoretic coating technology method of the invention comprises two methods, a cathodic electrophoresis process and an anodic electrophoresis process, wherein: in the cathodic electrophoresis process, a supplement is placed inside the deep hole of the steel pipe Auxiliary anode; In the anodic electrophoresis process, an auxiliary cathode is placed inside the deep hole of the steel pipe.
  • the steel pipe coated by the method of the invention is an iron pipe, a galvanized pipe or a plastic pipe; the electrophoretic coating used is one or more of polybutadiene resin, phenolic resin, epoxy resin, acrylic resin or polyurethane.
  • the electrophoretic coating used contains an electrophoretic coating with added fillers or auxiliaries.
  • the electrophoretic coating comprises colorless transparent, matte colorless, black, gray, white, red, yellow, green, blue color, and flash color, pearl color and electrophoretic coating with dye and pigment added;
  • the electrophoretic coating comprises a thermosetting coating or a photosensitive coating;
  • the auxiliary anode material is an electrically conductive conductor member.
  • the steel pipe is the electrophoresis element, the negative electrode (-) of the power supply, the anode
  • the anode material is a metal or non-metal metallized conductor that can pass current, and the auxiliary anode can be close to the inner wall of the pipe, but cannot be in direct contact with the steel pipe.
  • Non-conducting non-conducting objects such as plastic, rubber, wood and other non-conducting materials are required to support or block the auxiliary anode from colliding with and contacting the workpiece, and the non-conducting body has regular or irregular holes. Conducive to the electrophoretic coating into the inside of the steel pipe
  • the connection between the anode wire of the power source and the auxiliary anode can be connected at one end or at both ends.
  • the steel pipe is an electrophoresis element, connected to the positive electrode (+) of the electrophoresis source, the cathode C is connected to the negative electrode (-) of the power source, and an auxiliary cathode (B) is placed inside the steel pipe.
  • the auxiliary cathode material is a metal or non-metal metallized conductor that can pass current.
  • the auxiliary cathode and the inner wall of the pipe can be far apart, but cannot be in direct contact with the steel pipe.
  • Non-conducting non-conducting objects such as plastic, rubber, wood and other non-conducting materials are required to support or block the auxiliary cathode from colliding with and contacting the workpiece, while the non-conducting body is regular or not Regular holes help the electrophoretic coating to enter the interior of the workpiece.
  • the connection mode of the power cathode wire and the auxiliary cathode may be connected at one end or may be connected at both ends.
  • the invention can be combined into a brand-new complete equipment by the existing equipment, which is sequentially assembled by the following equipment: a steel pipe feeding machine, a degreasing machine, a water washing machine, a surface adjusting machine, a phosphating machine, a water washing machine, an electrophoresis machine, and a spraying machine.
  • a steel pipe feeding machine a degreasing machine
  • a water washing machine a surface adjusting machine
  • a phosphating machine a water washing machine
  • an electrophoresis machine an electrophoresis machine
  • spraying machine a spraying machine.
  • shower machine a washing machine, a baking machine, a cooling machine.
  • This complete set of equipment can produce single and multiple electrophoresis steel tubes.
  • the process flow of the invention is as follows: a steel pipe, a degreasing, a water washing, a table, a phosphating, a water washing, an electrophoresis, a spray, a water washing, a baking, a forced cooling, and a finished product packaging.
  • the invention has the advantages of simple structure, low manufacturing cost and wide application range, and the technical method of the invention can solve the electrophoresis treatment problem of the inner and outer walls of the steel pipe, thereby completely solving the anti-corrosion problem of the inner and outer walls of the workpiece.
  • the electrophoresis steel pipe of the invention can be widely applied to industries such as chemical industry, petroleum and natural gas, and has excellent corrosion resistance.
  • Figure 1 is a schematic view of a steel tube during cathodic electrophoresis
  • Figure 2 is a schematic view of the steel tube during the anodic electrophoresis process.
  • FIG. 3 is a combination diagram of the complete equipment of the present invention
  • the steel pipe A is an electrophoresis member, which is a cathode system, and is connected to a negative electrode (-) of a power source.
  • Auxiliary anode B is connected to the positive pole of the power supply ( + ).
  • Anode C is connected to the positive terminal of the power supply ( + ).
  • the electrophoretic coating may be a polybutadiene resin, a phenol resin, an epoxy resin, an acrylic resin or a polyurethane.
  • Partial electrophoresis can be used to connect the anode and the auxiliary anode with a diverter switch.
  • A. First electrophoresis the inside of the workpiece, connect the diverter switch to the auxiliary anode, and then electrophorese the inside of the workpiece. After that, the power switch will be switched to the anode and the outside of the workpiece will be electrophoresed.
  • Simultaneous electrophoresis can also be used to turn on the power and simultaneously electrophorese the inside and outside of the workpiece.
  • the thickness of the electrophoretic paint film can be guaranteed by controlling the voltage and time and other conditions.
  • the steps of the coating technique method of the present invention are as follows:
  • the steel pipe enters the feeding machine and starts to load the production line on the fixture for production.
  • the steel pipe first enters the degreaser equipment and is degreased and degreased to make the surface clean.
  • the steel pipe enters the washing machine and is washed with water.
  • the water washing can be washed one or more times to wash off the liquid and impurities from the previous process to clean the surface of the workpiece.
  • the steel pipe enters the surface conditioner to adjust the surface, which is beneficial to the phosphating film formation.
  • the steel pipe enters the phosphating machine and is phosphatized to obtain different phosphate coating layers on the surface, which is beneficial to the performance of the electrophoretic paint film.
  • the steel pipe enters the washing machine and is washed with water. The washing can pass one or more passes. Wash off the liquid and impurities from the previous process to clean the surface of the workpiece.
  • the steel pipe enters the electrophoresis machine and is subjected to electrophoresis treatment, and the inner and outer walls of the steel pipe are electrophoresed.
  • the electrophoresis steel pipe enters the sprayer equipment and is sprayed.
  • the medium used for spraying can be ultrafiltration water or pure water. Ultrafiltration is the water and solvent separated in the electrophoresis tank, which is good for cleaning. The cleaning solution is returned to the electrophoresis tank.
  • the electrophoresis steel pipe enters the washing machine and is washed with water. Wash off the liquid and impurities from the previous process to clean the surface of the workpiece.
  • the electrophoresis steel tube enters the baking machine and is baked and cured.
  • the baking machine equipment can be a heat curing baking device (such as electric heating, fuel heating, etc.) or a heat curing device (such as ultraviolet curing).
  • the electrophoresis steel tube enters the forced cooling equipment to be forced to cool, and it is quickly dried to make the workpiece easy to pack.
  • the electrophoresis steel pipe enters the cutting machine and is packed in the blank.
  • the steel tube (A) is an anode system for the electrophoresis member, and is connected to the positive electrode (+) of the power source.
  • the auxiliary cathode B is connected to the negative pole of the power supply (-).
  • the cathode C is connected to the negative pole of the power supply (-).
  • the electrophoretic coating may be a polybutadiene resin, a phenol resin, an epoxy resin, an acrylic resin or a polyurethane.
  • Partial electrophoresis can be used to connect the cathode and the auxiliary cathode with a diverter switch.
  • A. First electrophoresis the inside of the workpiece, connect the diverter switch to the auxiliary cathode, and then electrophorese the inside of the workpiece. After that, the power switch will be switched to the cathode and the outside of the workpiece will be electrophoresed.
  • Simultaneous electrophoresis can also be used to turn on the power and simultaneously electrophorese the inside and outside of the workpiece.
  • the thickness of the electrophoretic paint film can be guaranteed by controlling the voltage and time and other conditions.
  • the plastic galvanized steel pipe A is an electrophoresis member, which is a cathode system and is connected to a negative electrode (-) of a power source.
  • Auxiliary anode B is connected to the positive pole of the power supply ( + ).
  • Anode C is connected to the positive terminal of the power supply ( + ).
  • the electrophoretic coating may be a polybutadiene resin, a phenol resin, an epoxy resin, an acrylic resin or a polyurethane. 5. Turn on the power. There are a variety of methods: (1) Partial electrophoresis can be used to connect the anode and the auxiliary anode with a diverter switch. A. First electrophoretic galvanized steel pipe inside, connect the switch to the auxiliary anode, and then electrophorese the inside of the workpiece. After that, the power switch will be switched to the anode and the outside of the workpiece will be electrophoresed. B.
  • Electrophoresis the outside of the workpiece connect the diverter switch to the anode, and then electrophorese the outside of the workpiece. After that, switch the power switch to the auxiliary anode and electrophorese the inside of the workpiece.
  • Simultaneous electrophoresis can also be used to turn on the power supply and simultaneously electrophoretic galvanized steel pipe inside and outside.
  • the thickness of the electrophoretic paint film can be guaranteed by controlling the voltage and time and other conditions.
  • the coating technique method steps of the present invention are the same as in the first embodiment.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)

Abstract

L'invention concerne un tube en acier, un procédé et l'équipement pour le produire, en particulier un procédé électrophorétique de finition et un équipement permettant de produire un tube électrophorétique en acier dont la paroi interne et la paroi externe sont recouvertes d'un revêtement électrophorétique. Le procédé comprend une technique électrophorétique utilisant une cathode et une technique électrophorétique utilisant une anode. Avec la technique électrophorétique utilisant une cathode, une anode accessoire est insérée dans l'orifice du tube en acier ; et avec la technique électrophorétique utilisant une anode, une cathode accessoire est insérée dans l'orifice du tube en acier. Grâce à l'invention, le problème lié au procédé électrophorétique sur la paroi interne et la paroi externe du tube en acier est résolu, ainsi que les problèmes de corrosion de la paroi interne et de la paroi externe de pièces. L'invention peut être largement utilisée en ingénierie chimique, dans l'industrie du pétrole et du gaz naturel, et sa fonction de protection contre la corrosion est excellente.
PCT/CN2007/070945 2007-05-25 2007-10-24 Tube électrophorétique en acier, son procédé électrophorétique de finition et équipement complet WO2008144989A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN200710052274.5 2007-05-25
CNA2007100522745A CN101122358A (zh) 2007-05-25 2007-05-25 电泳钢管和电泳钢管的电泳涂装技术方法及成套设备

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WO2008144989A1 true WO2008144989A1 (fr) 2008-12-04

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PCT/CN2007/070945 WO2008144989A1 (fr) 2007-05-25 2007-10-24 Tube électrophorétique en acier, son procédé électrophorétique de finition et équipement complet

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CN (1) CN101122358A (fr)
WO (1) WO2008144989A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107687014A (zh) * 2017-08-18 2018-02-13 重庆市环岛机械制造有限公司 汽车配件浮动式涂装装置
CN111005051A (zh) * 2018-10-08 2020-04-14 株洲中车时代电气股份有限公司 金属件表面复合涂层的制备方法

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112391666A (zh) * 2020-12-15 2021-02-23 邢台职业技术学院 一种钢管电化学处理设备

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6468491A (en) * 1987-09-09 1989-03-14 Fujikura Ltd Production of enameled pipe
CN2061936U (zh) * 1989-09-10 1990-09-12 山西省文水县凤凰散热器厂 钢制散热器内防腐电泳涂层装置
EP0432517A1 (fr) * 1989-11-21 1991-06-19 Reiner Eichler Procédé pour le laquage par électrophorèse de la surface interne d'un récipient métallique à symétrie de révolution
DE19641155A1 (de) * 1996-10-07 1998-04-16 Eisenmann Foerdertech Verfahren und Vorrichtung zum elektrophoretischen Beschichten eines Innenraumes mindestens einseitig offener Hohlkörper
CN101003908A (zh) * 2006-12-15 2007-07-25 李再亮 管件式金属及深孔深凹件金属的电泳涂装技术方法

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6468491A (en) * 1987-09-09 1989-03-14 Fujikura Ltd Production of enameled pipe
CN2061936U (zh) * 1989-09-10 1990-09-12 山西省文水县凤凰散热器厂 钢制散热器内防腐电泳涂层装置
EP0432517A1 (fr) * 1989-11-21 1991-06-19 Reiner Eichler Procédé pour le laquage par électrophorèse de la surface interne d'un récipient métallique à symétrie de révolution
DE19641155A1 (de) * 1996-10-07 1998-04-16 Eisenmann Foerdertech Verfahren und Vorrichtung zum elektrophoretischen Beschichten eines Innenraumes mindestens einseitig offener Hohlkörper
CN101003908A (zh) * 2006-12-15 2007-07-25 李再亮 管件式金属及深孔深凹件金属的电泳涂装技术方法

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* Cited by examiner, † Cited by third party
Title
MO J.: "Remark on the quality management of cathodic electrodeposition", MODERN COATING & FINISHING 2006, no. 6, May 2006 (2006-05-01), pages 25 *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107687014A (zh) * 2017-08-18 2018-02-13 重庆市环岛机械制造有限公司 汽车配件浮动式涂装装置
CN107687014B (zh) * 2017-08-18 2019-02-22 重庆市环岛机械制造有限公司 汽车配件浮动式涂装装置
CN111005051A (zh) * 2018-10-08 2020-04-14 株洲中车时代电气股份有限公司 金属件表面复合涂层的制备方法
CN111005051B (zh) * 2018-10-08 2022-03-22 株洲中车时代电气股份有限公司 金属件表面复合涂层的制备方法

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