WO2004067803A1 - Tube d'acier a revetement protecteur multicouche - Google Patents

Tube d'acier a revetement protecteur multicouche Download PDF

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Publication number
WO2004067803A1
WO2004067803A1 PCT/JP2003/016888 JP0316888W WO2004067803A1 WO 2004067803 A1 WO2004067803 A1 WO 2004067803A1 JP 0316888 W JP0316888 W JP 0316888W WO 2004067803 A1 WO2004067803 A1 WO 2004067803A1
Authority
WO
WIPO (PCT)
Prior art keywords
steel pipe
layer
zinc
multilayer protective
coating layer
Prior art date
Application number
PCT/JP2003/016888
Other languages
English (en)
Japanese (ja)
Inventor
Takanori Kon
Original Assignee
Sanoh Industrial Co., 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 Sanoh Industrial Co., Ltd. filed Critical Sanoh Industrial Co., Ltd.
Publication of WO2004067803A1 publication Critical patent/WO2004067803A1/fr

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
    • C25D11/36—Phosphatising
    • 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
    • C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L58/00—Protection of pipes or pipe fittings against corrosion or incrustation
    • F16L58/02—Protection of pipes or pipe fittings against corrosion or incrustation by means of internal or external coatings
    • F16L58/04—Coatings characterised by the materials used
    • F16L58/08—Coatings characterised by the materials used by metal
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/14—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to metal, e.g. car bodies
    • B05D7/146—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to metal, e.g. car bodies to metallic pipes or tubes

Definitions

  • the present invention relates to a multi-layer protective coated steel pipe, and more particularly to a multi-layer protective coated steel pipe used for piping outside a vehicle body that forms a brake system and a lubrication system of an automobile or the like.
  • steel pipes are frequently used for various pipes used in automobiles and the like, for example, brake pipes, fuel pipes, and the like.
  • a multi-layer protective coating layer is formed for the purpose of protection from the like.
  • this multilayer protective coating layer for example, first, a zinc plating layer is formed on the outer peripheral surface of a steel pipe, and a chromate coating layer having a good surface property is formed above the zinc plating layer, and a primer or a primer is interposed as the upper layer.
  • a fluororesin layer or a nylon resin layer is formed, and further, for example, a layer formed by applying a vinyl chloride resin layer as an upper layer, or a layer formed by heat shrinking a polyolefin resin layer, Is formed by extruding a polyethylene resin layer or a polypropylene resin layer.
  • an object of the present invention is to form a multilayer protective coating layer on the surface of a steel pipe without using harmful hexavalent chromium, etc., and to achieve excellent high adhesion and corrosion resistance equivalent to or higher than conventional chromate films. It is an object of the present invention to provide a multi-layer protective coated steel pipe provided with a surface coating layer having a property. Disclosure of the invention
  • the present inventors have conducted intensive research to achieve the above-mentioned object.
  • the zinc phosphate film layer was formed by electrolytic treatment on the zinc plating layer. It has been found that a multi-layer protective coated steel pipe provided with a surface coating layer having excellent adhesion and corrosion resistance equal to or higher than that of a conventional chromatographic coating can be economically provided when formed as a conventional coating. Completed.
  • the present invention provides a zinc-based plating layer formed on the outer peripheral surface of a steel pipe, a zinc phosphate coating layer formed on the zinc-based plating layer, and a synthetic coating formed on the zinc phosphate coating layer.
  • a multilayer protective coated steel pipe having a resin layer.
  • a single-wound steel pipe or a double-wound steel pipe formed from a steel plate can be used as the above-mentioned steel pipe, and it may have a copper plating layer of several m on the outer peripheral surface.
  • ERW steel pipes, drawn steel pipes, and the like can also be used.
  • the outer diameter and thickness of these steel pipes are not particularly limited, but the outer diameter is 4.776 to 20 mm, and the thickness is 0.5 to 1
  • a thin-walled thin steel pipe of mm is preferable for various pipes used in automobiles and the like.
  • Examples of the zinc plating layer formed on the outer peripheral surface of the steel pipe include Zn plating, Zn—Ni alloy plating, and Zn—A1 alloy plating.
  • the same type or different types may be formed as a multi-layer zinc-based plating layer in which two or more types are plated.
  • the zinc A known method such as an electrolysis method and a melting method may be used as a method for forming the system plating layer.
  • the electrolysis method is preferred because a uniform and smooth thin zinc-based plating layer can be economically formed.
  • the thickness of the zinc-based plating layer is preferably 3 to 40 from the viewpoint of corrosion resistance and economy.
  • the zinc phosphate coating layer formed on the zinc plating layer is not particularly limited as long as it contains zinc phosphate as a main component.
  • the thickness of the zinc phosphate coating layer is preferably 0.01 to 2 m. This is because if the thickness of the zinc phosphate coating layer formed on the zinc-based plating layer is less than 0.01 im, the function and effect of improving the corrosion resistance of the steel pipe do not appear. Conversely, if a zinc phosphate coating layer with a thickness of more than 2 is formed, the formed zinc phosphate coating layer may be cracked and peeled off during bending of the steel pipe after surface treatment. This is because there is.
  • the zinc phosphate coating layer having the above film thickness for example, phosphate ions, nitrate ions, and zinc ions are contained, and if necessary, nickel ions, manganese ions, magnesium ions, etc. It is preferably formed by electrolytic treatment using an aqueous solution containing another metal.
  • the current density in this case, especially not limited, short period of time in order to economically form the skin layer of the film thickness control current density 5 to 1 5 AZ dm 2 of within range Is preferred.
  • the steel pipe on which the zinc phosphate coating layer is formed may be subjected to a primer treatment, if desired.
  • This primer treatment has been used as a surface treatment method that can enhance the adhesion to a synthetic resin layer formed later.
  • This is a known treatment, and the specific method thereof is not particularly limited. Usually, a method of immersing a steel pipe in a primer treatment agent, a method of spraying a primer treatment agent onto a steel pipe, or the like is employed.
  • examples of the primer treatment agent include various known organic primer treatment agents such as an epoxy resin dissolved in an organic solvent or a chlorinated rubber, and known various primers such as chromium oxide-colloidal silica. Inorganic primer treatment agents can be used.
  • the zinc phosphate coating layer, or the synthetic resin layer formed as an upper layer of the primer formed on the zinc phosphate coating layer if desired, may be a single layer formed by a method such as coating or extrusion molding, or It can be a multi-layer synthetic resin layer in which the same or different kinds are laminated, and the resin material forming the synthetic resin layer is PVF (polyvinyl fluoride), PVDF (polyvinyldene fluoride), PP ( Synthetic resins such as polypropylene), PE (polyethylene), PA11 (polyamide 11), and PA12 (polyamide 12).
  • PVF polyvinyl fluoride
  • PVDF polyvinyldene fluoride
  • PP Synthetic resins such as polypropylene
  • PE polyethylene
  • PA11 polyamide 11
  • PA12 polyamide 12
  • the above synthetic resin layer is formed for the purpose of countermeasures against impact from hopping stones, countermeasures for interference between pipes that follow complicated paths, or pipes and the vehicle body and other parts, and also measures for heat insulation.
  • the layer thickness is preferably from 10 to 1500 m.
  • PVF polyvinyl fluoride
  • PVDF polyvinyldene fluoride
  • thermoplastic resin such as PP (polypropylene) or PA11 (polyamide 11) is sent in a longitudinal direction using a known extruder.
  • a synthetic resin layer firmly adhered to the surface of the steel pipe can be formed.
  • a steel pipe having a multilayer protective coating layer having excellent corrosion resistance and adhesion can be formed without forming a chromate film using harmful hexavalent chromium or the like.
  • the outer peripheral surface of the steel pipe was subjected to a primer treatment by baking coating, and a fluorine resin layer having a thickness of about 20 im was formed thereon by baking coating to obtain a multilayer protective coated steel pipe.
  • a PP (polypropylene) resin layer having a layer thickness of about 100 m is formed by extrusion molding on the multilayer protective coated steel pipe of Example 1 above, and the outermost synthetic resin layer is made of a different kind of synthetic resin. This was a two-layer multi-layer protective coated steel pipe.
  • Example 4 Instead of the fluororesin layer obtained by baking the multi-layer protective coated steel pipe of Example 1 above, a PA11 (polyamide 11) resin layer having a layer thickness of about 150 m was pressed. A multilayer protective coated steel pipe formed on the primer by extrusion molding. (Example 4)
  • a PP (polypropylene) resin layer having a layer thickness of about 100 im is formed by extrusion molding on the multilayer protective coated steel pipe of Example 3 above, and the outermost synthetic resin layer is made of a different kind of synthetic resin. This was a two-layer multi-layer protective coated steel pipe.
  • Each of the multilayer protective coated steel pipes of the present invention according to Examples 1 to 4 described above is a multilayer protective coated steel pipe having good adhesion between layers and high corrosion resistance, and subjected to various bending processes. It can be suitably used for various pipes used in automobiles and the like, such as brake pipes and fuel pipes. Industrial availability
  • the multilayer protective-coated steel pipe according to the present invention described above can provide a multilayer protective-coated steel pipe having excellent corrosion resistance and adhesion without forming a chromate film using harmful hexavalent chromium.
  • the multilayer protective coated steel pipe according to the present invention for various pipes used in automobiles, etc., the elution of hexavalent chromium, which is an environmentally hazardous substance, into the environment can be significantly reduced, and a great effect on environmental protection Demonstrate.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Electrochemistry (AREA)
  • Other Surface Treatments For Metallic Materials (AREA)
  • Laminated Bodies (AREA)

Abstract

La présente invention concerne un tube d'acier à revêtement protecteur multicouche, et notamment la réalisation d'un revêtement protecteur multicouche sur la surface du tube d'acier. En l'occurrence, on réalise une couche de revêtement superficiel présentant un coefficient élevé d'adhérence et une résistance élevée à la corrosion identique, si ce n'est supérieur à ce que donne les revêtements conventionnels chromatés, et ce, sans utilisation de chrome hexavalent toxique notamment. L'invention concerne plus particulièrement un tuyau d'acier à revêtement protecteur multicouche comprenant un tuyau d'acier, et garni sur la surface extérieure, d'une couche de zinc électrolytique, d'une couche de revêtement au phosphate de zinc sur une épaisseur de 0,01 à 2 µm déposée sur la couche de zinc électrolytique par électrolyse, et d'une couche de résine synthétique formée sur la couche de revêtement au phosphate de zinc, par dépôt de couche ou par extrusion.
PCT/JP2003/016888 2003-01-29 2003-12-26 Tube d'acier a revetement protecteur multicouche WO2004067803A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2003-20369 2003-01-29
JP2003020369A JP2004232010A (ja) 2003-01-29 2003-01-29 多層保護被覆鋼管

Publications (1)

Publication Number Publication Date
WO2004067803A1 true WO2004067803A1 (fr) 2004-08-12

Family

ID=32820627

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2003/016888 WO2004067803A1 (fr) 2003-01-29 2003-12-26 Tube d'acier a revetement protecteur multicouche

Country Status (2)

Country Link
JP (1) JP2004232010A (fr)
WO (1) WO2004067803A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BRPI0618156A2 (pt) * 2005-11-01 2012-02-28 Sanoh Ind Co Ltd tubo de aço para uso em uma tubulação de um automóvel
JP5225662B2 (ja) * 2007-11-21 2013-07-03 三桜工業株式会社 車両配管用鋼管
MX2017010041A (es) * 2015-02-13 2017-12-18 Sanoh Ind Co Ltd Tubo de metal recubierto para tubería de vehículo y método para producir el mismo.
EP3940106A1 (fr) * 2020-07-15 2022-01-19 TI Automotive Engineering Centre (Heidelberg) GmbH Procédé de revêtement d'une conduite et conduite

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03126893A (ja) * 1989-10-12 1991-05-30 Kawasaki Steel Corp 化成処理性に優れた亜鉛系電気めっき鋼板の製造方法
WO2001053566A1 (fr) * 2000-01-19 2001-07-26 Itt Manufacturing Enterprises, Inc. Tube metallique resistant a la corrosion et procede de fabrication correspondant

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03126893A (ja) * 1989-10-12 1991-05-30 Kawasaki Steel Corp 化成処理性に優れた亜鉛系電気めっき鋼板の製造方法
WO2001053566A1 (fr) * 2000-01-19 2001-07-26 Itt Manufacturing Enterprises, Inc. Tube metallique resistant a la corrosion et procede de fabrication correspondant

Also Published As

Publication number Publication date
JP2004232010A (ja) 2004-08-19

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