WO2016158836A1 - Metal spraying method - Google Patents

Metal spraying method Download PDF

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Publication number
WO2016158836A1
WO2016158836A1 PCT/JP2016/059857 JP2016059857W WO2016158836A1 WO 2016158836 A1 WO2016158836 A1 WO 2016158836A1 JP 2016059857 W JP2016059857 W JP 2016059857W WO 2016158836 A1 WO2016158836 A1 WO 2016158836A1
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WO
WIPO (PCT)
Prior art keywords
base material
metal spraying
sprayed coating
coating
sprayed
Prior art date
Application number
PCT/JP2016/059857
Other languages
French (fr)
Japanese (ja)
Inventor
直治 森井
Original Assignee
株式会社ビルドランド
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Publication date
Application filed by 株式会社ビルドランド filed Critical 株式会社ビルドランド
Priority to KR1020177021116A priority Critical patent/KR101927280B1/en
Publication of WO2016158836A1 publication Critical patent/WO2016158836A1/en

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    • 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
    • C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
    • C23F13/00—Inhibiting corrosion of metals by anodic or cathodic protection
    • C23F13/02—Inhibiting corrosion of metals by anodic or cathodic protection cathodic; Selection of conditions, parameters or procedures for cathodic protection, e.g. of electrical conditions
    • C23F13/06—Constructional parts, or assemblies of cathodic-protection apparatus
    • 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
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • 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
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
    • C04B41/4505—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements characterised by the method of application
    • C04B41/4523—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements characterised by the method of application applied from the molten state ; Thermal spraying, e.g. plasma spraying
    • 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
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
    • C04B41/46—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with organic materials
    • C04B41/49—Compounds having one or more carbon-to-metal or carbon-to-silicon linkages ; Organo-clay compounds; Organo-silicates, i.e. ortho- or polysilicic acid esters ; Organo-phosphorus compounds; Organo-inorganic complexes
    • C04B41/4905—Compounds having one or more carbon-to-metal or carbon-to-silicon linkages ; Organo-clay compounds; Organo-silicates, i.e. ortho- or polysilicic acid esters ; Organo-phosphorus compounds; Organo-inorganic complexes containing silicon
    • 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
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
    • C04B41/50—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials
    • C04B41/51—Metallising, e.g. infiltration of sintered ceramic preforms with molten metal
    • 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
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
    • C04B41/52—Multiple coating or impregnating multiple coating or impregnating with the same composition or with compositions only differing in the concentration of the constituents, is classified as single coating or impregnation
    • C04B41/522—Multiple coatings, for one of the coatings of which at least one alternative is described
    • 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
    • C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
    • C23C4/04—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the coating material
    • C23C4/06—Metallic material
    • 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
    • C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
    • C23C4/18—After-treatment
    • 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
    • C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
    • C23F13/00—Inhibiting corrosion of metals by anodic or cathodic protection
    • C23F13/02—Inhibiting corrosion of metals by anodic or cathodic protection cathodic; Selection of conditions, parameters or procedures for cathodic protection, e.g. of electrical conditions
    • C23F13/06—Constructional parts, or assemblies of cathodic-protection apparatus
    • C23F13/08—Electrodes specially adapted for inhibiting corrosion by cathodic protection; Manufacture thereof; Conducting electric current thereto
    • C23F13/10—Electrodes characterised by the structure
    • 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
    • C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
    • C23F2201/00—Type of materials to be protected by cathodic protection
    • C23F2201/02—Concrete, e.g. reinforced

Definitions

  • the present invention relates to a method of performing metal spraying on the surface of a base material made of metal such as iron, concrete, or mortar.
  • Patent Document 1 discloses that a metal sprayed coating is formed on the surface of a base material made of iron, and the sprayed coating is impregnated with a silane coupling agent and cured to provide a sealing treatment.
  • a metal spraying method is disclosed in which a coating is formed by applying a coating on a coating of a coupling agent.
  • Patent Document 2 forms a metal spray coating on the surface of a base material made of iron, and impregnates the sealing coating agent containing an aromatic oligomer, an epoxy polyol resin, an isocyanate resin, a pigment and an organic solvent. Disclosed is a metal spraying method for curing and sealing.
  • the metal spraying method of Patent Document 1 can perform sealing treatment by curing the silane coupling agent and improve the strength of the sprayed coating itself by the sealing treatment.
  • the metal spraying method of Patent Document 2 is aromatic. While improving the impregnation property of the sealing agent with oligomers, the sealing agent is cured by the reaction between the epoxy polyol resin and the isocyanate resin, and the sealing treatment is performed and the strength of the thermal spray coating itself is improved by the sealing treatment. Can be made.
  • the surface of the base material is roughened by blasting in advance to form an uneven shape, and the substrate surface having the uneven shape is subjected to metal spraying to provide an anchor effect. It is necessary to secure the adhesion strength of the sprayed coating to the substrate surface.
  • the present invention eliminates the step of previously imparting a concavo-convex shape to the surface of the substrate, and by applying and impregnating a paint with a specific composition to the spray coating, in addition to sealing treatment and strength enhancement of the spray coating, It is possible to increase the adhesion strength of the thermal spray coating to the substrate surface, and to make sure that the thermal spray coating is reliably adhered to the substrate surface even when the substrate is concrete or mortar.
  • a metal spraying method is provided.
  • the metal spraying method according to the present invention is a method of performing metal spraying on the surface of a base material, and a silicone compound mixture containing an alkoxy group, a glycidic group and a polymer alkyl group on a sprayed coating formed by the spraying.
  • HDI hexamethyl
  • the above-mentioned paint forms a high strength coating film with extremely good heat resistance and weather resistance on the sprayed coating.
  • the polymer alkyl group contained in the silicone compound will be described.
  • the polymer alkyl group means an alkyl group having 6 to 10 carbon atoms, and the polymer alkyl group is composed of the above-mentioned silicone compound mixture and a hexamethyl group polymer.
  • the compatibility with other polymers and monomers such as isocyanate is remarkably improved.
  • titanium alcoholate or tin fatty acid is blended as a catalyst with the paint, and the paint is efficiently cured.
  • the proportion of the alkoxy group in the silicone compound mixture is 35% to 40% by weight, and the proportion of the glycid group in the silicone compound mixture is 10% to 15% by weight.
  • Performance properties such as properties, strength properties, and defoaming properties.
  • the compatibility of the silicone compound mixture and the hexamethyl polyisocyanate is remarkably improved by setting the ratio of the polymer alkyl group in the silicone compound mixture to 10% to 22% by weight.
  • silicone compound mixture a mixture of a long-chain alkylalkoxysilane and a glycid group-containing alkoxysilane is preferably used.
  • a conductive member that connects between the reinforcing steel bar embedded in the base material and the thermal spray coating is provided, and one end of the conductive member is reinforced by the reinforcement Engaging with the reinforcing bar and projecting the other end from the surface of the base material and embedding it in the thermal spray coating, energization between the thermal spray coating and the reinforcing steel bar is promoted, and the base material and the reinforcing steel bar are effectively provided.
  • a silicone compound mixture containing an alkoxy group, a glycid group and a polymer alkyl group and a hexamethyl polyisocyanate are blended at a weight ratio of 1: 1 to 7, before curing.
  • the coating By impregnating the coating with a high impregnation property and exhibiting high adhesive strength into the sprayed coating and curing it, the coating enters and cures the micropores existing in the sprayed coating while properly sealing the micropores.
  • the strength of the sprayed coating itself can be increased, and the coating material can be filled and cured in fine voids defined between the back surface of the sprayed coating and the surface of the base material to enhance the adhesion strength of the sprayed coating.
  • the adhesion strength of the sprayed coating to the substrate surface can be enhanced by the coating material, even if the substrate is concrete or mortar, metal spraying can be appropriately applied to the substrate surface.
  • Sectional drawing which shows typically the state which gave metal spraying to the base-material surface, and formed the sprayed coating. Sectional drawing which shows typically the state which impregnated the coating into the sprayed coating and hardened it.
  • (A) is explanatory drawing which shows the state which provided the electrically-conductive member in the base material which consists of concrete or mortar, notching a base material
  • (B) is explanatory drawing which looked at (A) from the side
  • Explanatory drawing which forms a sprayed coating on the base-material surface which consists of concrete or mortar cuts a base material, and shows the state which embedded the other end part of the electrically-conductive member in this sprayed coating.
  • the surface 1a of the base material 1 is subjected to keren treatment using a known disk sander or the like, so that dirt, oil, and deterioration
  • the coated film, floating rust, and the like are removed, and metal spraying is performed on the surface 1a of the substrate 1 using a known spraying machine to form the sprayed coating 2.
  • the sprayed coating 2 is formed so as to have a thickness of 50 to 500 ⁇ m.
  • the most preferred thickness is 50 to 150 ⁇ m.
  • a metal having a higher ionization tendency (base) than the metal constituting the base 1 is used when the base 1 is made of metal.
  • base material 1 is made of iron (steel), zinc, aluminum, magnesium, or an alloy thereof is sprayed.
  • the substrate 1 is made of concrete or mortar, a metal having a higher ionization tendency than the reinforcing reinforcing bars (iron), that is, zinc, aluminum, magnesium, or an alloy thereof is sprayed as described above.
  • the spraying method is not particularly limited.
  • the back surface 2b of the thermal spray coating 2 defines a fine gap 4 between the portion that is in close contact with the substrate surface 1a and the substrate surface 1a that is spaced apart from the substrate surface 1a.
  • the adhesion strength of the thermal spray coating 2 to the substrate surface 1a is weak due to the presence of the fine voids 4.
  • fine holes 3 are formed in the sprayed coating 2.
  • a one-component and solventless paint 5 formed by blending a silicone compound mixture and hexamethyl polyisocyanate on the surface 2 a of the thermal spray coating 2 is removed by brush, roller, It is applied by a known application means such as spray, and the spray coating 2 is impregnated with the paint 5.
  • the silicone compound mixture contains an alkoxy group, a glycid group, and a polymer alkyl group (alkyl group having 6 to 10 carbon atoms), and preferably the proportion of the alkoxy group in the silicone compound mixture is expressed by weight ratio. 35% to 40%, and the proportion of the glycid group in the silicone compound mixture is set to 10% to 15% by weight to improve the properties of the paint 5 such as curing reactivity, strength properties, and defoaming properties. .
  • the compatibility of the silicone compound mixture and the hexamethyl polyisocyanate is remarkably improved by setting the ratio of the polymer alkyl group in the silicone compound mixture to 10% to 22% by weight.
  • silicone compound mixture examples include a mixture of a long-chain alkylalkoxysilane and a glycid group-containing alkoxysilane.
  • the silicone compound mixture and the hexamethyl polyisocyanate are blended in a weight ratio of 1: 1 to 1: 7.
  • a paint 5 having both the impregnation property before curing and the adhesive strength after curing is obtained. In other words, desired impregnation and adhesive strength cannot be obtained outside the range of the ratio.
  • the paint 5 can be efficiently cured and cured, and the curing time can be shortened and effectively cured.
  • the silanol produced by modifying the silicone compound mixture and the polyurea produced by modifying the hexamethyl polyisocyanate undergo a curing reaction, and exhibit high adhesive strength after curing.
  • the amount of the silicone compound mixture is adjusted so that the paint 5 becomes a low-viscosity liquid having a temperature of 25 ° C. and a viscosity of 50 to 500 mPa ⁇ s, preferably 200 mPa ⁇ s or less.
  • the coating 5 having a high impregnation property and low viscosity as described above easily enters the micropores 3 formed in the sprayed coating 2 as shown in FIG.
  • the fine voids 4 defined between the coating back surface 2b and the substrate surface 1a are easily reached, filled in the fine voids 4 and cured.
  • the paint 5 hardens without gaps in the micropores 3 and cures without gaps in the microvoids 4 and exhibits high adhesive strength after curing.
  • the paint 5 cured in the fine gap 4 firmly adheres to the substrate surface 1 a and gives an anchor effect to the sprayed coating 2.
  • the unimpregnated portion of the paint 5 forms a strong coating film 5 ′ having good heat resistance and weather resistance on the surface 2 a of the thermal spray coating 2.
  • the coating material 5 penetrates into the fine holes 3 and hardens, thereby appropriately sealing the fine holes 3 and at the same time enhancing the strength of the sprayed coating 2 itself.
  • the fine gap 4 between the sprayed coating back surface 2b and the substrate surface 1a is filled and cured, thereby firmly bonding the sprayed coating 2 and the substrate surface 1a to enhance the adhesion strength to the substrate surface 1a. it can.
  • a coating film 5 ′ is formed on the surface 2 a of the sprayed coating 2 to appropriately protect the sprayed coating 2.
  • a part of the back surface 2b of the sprayed coating 2 is in close contact with the surface 1a of the substrate 1, and the substrate 1 is made of metal.
  • the current flow from the base material 1 to the thermal spray coating 2 is not hindered, and the thermal spray coating 2 made of a metal having a higher ionization tendency than the metal of the base material 1 is dissolved at the expense of The substrate 1 is protected.
  • conductive members such as bolts and anchor pins that connect between the reinforcing reinforcing bars 7 embedded in the base material 1 and the thermal spray coating 2 are used. 6 is provided, energization between the reinforcing reinforcing bar 7 and the thermal spray coating 2 is promoted, and the thermal spray coating 2 serves as a sacrificial anode to effectively protect the substrate 1 and the reinforcing reinforcing bar 7.
  • a hole is formed in the substrate 1, a bolt as the conductive member 6 is inserted into the hole, and one end portion 6a of the conductive member 6 is used as a base.
  • the surface layer of the base material 1 is peeled until the reinforcing reinforcing bar 7 is exposed, and the one end portion 6a of the conductive member 6 and the reinforcing reinforcing bar 7 are bound, and then, the above-mentioned damaged portion is filled with mortar.
  • the conductive member 6 may be fixed by returning it.
  • an anchor pin whose one end portion 6a is expanded is used as the conductive member 6, and the one end portion 6a is expanded to reinforce the reinforcing bar 7 (horizontal bar).
  • Engaging with 7a) is optional depending on the implementation.
  • 3A to 3C show an example in which one end portion 6a of the conductive member 6 is engaged only with the horizontal reinforcing bar 7a of the reinforcing reinforcing bars 7, but in addition to this, the vertical reinforcing bar 7b is also related.
  • the case of combining them or the case of engaging only with the vertical bars 7b is optional depending on the implementation.
  • the engagement between the one end portion 6a of the conductive member 6 and the reinforcing bar 7 in the present invention is not particularly limited as long as it is possible to energize between the conductive member 6 and the reinforcing bar 7.
  • metal spraying is performed on the substrate surface 1 a
  • metal spraying is also performed on the other end portion 6 b of the conductive member 6, and the conductive member 6 is formed in the sprayed coating 2 formed.
  • the other end portion 6b is buried, and the reinforcing reinforcing bar 7 and the thermal spray coating 2 are connected.
  • the paint 5 is applied to the surface 2 a of the sprayed coating 2 formed and the sprayed coating 2 is impregnated with the paint 5.
  • the coating 5 hardens without gaps in the fine holes 3 of the thermal spray coating 2, and cures without gaps in the fine gaps 4, and exhibits high adhesive strength after curing.
  • the paint 5 cured in the fine gap 4 firmly adheres to the substrate surface 1 a and gives an anchor effect to the sprayed coating 2.
  • a part of the paint 5 soaks into the substrate surface 1a and hardens, and is integrated with the paint 5 hardened in the fine gap 4 to complement the anchor effect. To do. Further, the unimpregnated portion of the coating 5 forms a strong coating film 5 ′ having good heat resistance and weather resistance on the surface 2 a of the thermal spray coating 2.
  • the adhesion strength of the thermal spray coating 2 can be increased, and the conductive member 6 that connects the thermal spray coating 2 and the reinforcing reinforcing bars 7 and promotes energization therebetween is provided.
  • the sprayed coating 2 becomes a sacrificial anode and effectively protects the base material 1 and the reinforcing steel bars 7.
  • the surface of the base material that does not give the uneven shape is directly metal sprayed, and after forming the sprayed coating, it is impregnated through fine holes with a coating that has high impregnation and low viscosity before curing and exhibits high adhesive strength after curing.
  • this is a unique thermal spraying method that simultaneously seals the fine holes, increases the strength of the thermal spray coating itself, and increases the adhesion strength of the thermal spray coating to the substrate surface.
  • the base material 1 is concrete or mortar
  • the base member and the reinforcing reinforcing bar can be effectively protected by the conductive member connecting the reinforcing reinforcing bars.
  • the numerical range indicated by “ ⁇ ” between the lower limit value and the upper limit value represents all numerical values (integer value and decimal value) between the lower limit value and the upper limit value. The same applies to the claims.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Ceramic Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Structural Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Prevention Of Electric Corrosion (AREA)
  • Coating By Spraying Or Casting (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Paints Or Removers (AREA)

Abstract

Provided is a metal spraying method in which a sprayed coat is coated and impregnated with a coating material having a particular formulation, whereby in addition to sealing and increasing the strength of the sprayed coat, the adhesive strength of the sprayed coat with respect to the surface of a base material can be increased. Metal spraying is carried out on a surface 1a of a base material 1. A sprayed coat 2 formed by said spraying is impregnated with a one-pack type coating material 5 formulated to contain a silicone compound mixture, which contains an alkoxy group, a glycidyl group, and a polymeric alkyl group, and a hexamethyl-based polyisocyanate at a weight ratio of 1:1-7, and the sprayed coat 2 is then cured, whereby, while the sprayed coat 2 is sealed, the strength of the sprayed coat 2 can be increased, and the adhesive strength of the sprayed coat 2 with respect to the base material surface 1a can be increased. The coating material 5 forms a coating film 5' having high strength and exceptionally good heat resistance and weather resistance upon the sprayed coat 2.

Description

金属溶射方法Metal spraying method
　本発明は、鉄等の金属又はコンクリート又はモルタルから成る基材の表面に金属溶射を施す方法に関する。 The present invention relates to a method of performing metal spraying on the surface of a base material made of metal such as iron, concrete, or mortar.
　従来の金属溶射方法として、下記特許文献１は、鉄から成る基材の表面に金属溶射被膜を形成し、該溶射被膜にシランカップリング剤を含浸し硬化させて封孔処理を施し、該シランカップリング剤の被膜上に塗料を塗布して塗膜を形成する金属溶射方法を開示している。 As a conventional metal spraying method, the following Patent Document 1 discloses that a metal sprayed coating is formed on the surface of a base material made of iron, and the sprayed coating is impregnated with a silane coupling agent and cured to provide a sealing treatment. A metal spraying method is disclosed in which a coating is formed by applying a coating on a coating of a coupling agent.
　又下記特許文献２は、鉄から成る基材の表面に金属溶射被膜を形成し、該溶射被膜に芳香族オリゴマー、エポキシポリオール樹脂、イソシアネート樹脂、顔料及び有機溶剤を含む封孔処理剤を含浸し硬化させて封孔処理を施す金属溶射方法を開示している。 Further, Patent Document 2 below forms a metal spray coating on the surface of a base material made of iron, and impregnates the sealing coating agent containing an aromatic oligomer, an epoxy polyol resin, an isocyanate resin, a pigment and an organic solvent. Disclosed is a metal spraying method for curing and sealing.
特開平２ー１４９６５７号公報JP-A-2-149657 特開２０１２ー２５１１９７号公報Japanese Unexamined Patent Publication No. 2012-251197
　上記特許文献１の金属溶射方法はシランカップリング剤の硬化により封孔処理を施すと共に該封孔処理によって溶射被膜自体の強度を向上させることができ、上記特許文献２の金属溶射方法は芳香族オリゴマーにより封孔処理剤の含浸性を改善しつつエポキシポリオール樹脂とイソシアネート樹脂との反応により封孔処理剤を硬化反応させて封孔処理を施すと共に該封孔処理によって溶射被膜自体の強度を向上させることができる。 The metal spraying method of Patent Document 1 can perform sealing treatment by curing the silane coupling agent and improve the strength of the sprayed coating itself by the sealing treatment. The metal spraying method of Patent Document 2 is aromatic. While improving the impregnation property of the sealing agent with oligomers, the sealing agent is cured by the reaction between the epoxy polyol resin and the isocyanate resin, and the sealing treatment is performed and the strength of the thermal spray coating itself is improved by the sealing treatment. Can be made.
　然し乍ら、上記特許文献１・２の金属溶射方法にあっては、予め基材表面をブラスト処理により粗面化して凹凸形状を形成し、該凹凸形状を有する基材表面に金属溶射を施しアンカー効果を得ることにより、溶射被膜の基材表面に対する付着強度を確保する必要がある。 However, in the metal spraying method of Patent Documents 1 and 2 above, the surface of the base material is roughened by blasting in advance to form an uneven shape, and the substrate surface having the uneven shape is subjected to metal spraying to provide an anchor effect. It is necessary to secure the adhesion strength of the sprayed coating to the substrate surface.
　又上記特許文献１・２の金属溶射方法においては、基材が鉄の場合に限定しており、基材がコンクリート又はモルタルの場合を一切想定していない。 Moreover, in the metal spraying method of the said patent documents 1 and 2, it is limited to the case where a base material is iron, and the case where a base material is concrete or mortar is not assumed at all.
　本発明は、基材表面に予め凹凸形状を付与する工程を排し、溶射被膜に対し特有の配合による塗料を塗布し含浸させることにより、該溶射被膜の封孔処理及び強度増強に加えて、同溶射被膜の基材表面に対する付着強度の増強をも図ることができ、且つ基材がコンクリート又はモルタルの場合にあっても確実に溶射被膜を基材表面に付着させることができる画期的な金属溶射方法を提供する。 The present invention eliminates the step of previously imparting a concavo-convex shape to the surface of the substrate, and by applying and impregnating a paint with a specific composition to the spray coating, in addition to sealing treatment and strength enhancement of the spray coating, It is possible to increase the adhesion strength of the thermal spray coating to the substrate surface, and to make sure that the thermal spray coating is reliably adhered to the substrate surface even when the substrate is concrete or mortar. A metal spraying method is provided.
　要述すると、本発明に係る金属溶射方法は、基材の表面に金属溶射を行い、該溶射により形成された溶射被膜に、アルコキシ基、グリシド基及び高分子アルキル基を含有するシリコーン化合物混合体とヘキサメチル系（ＨＤＩ系）ポリイソシアネートとを１：１～７の重量比で配合して成る一液型塗料、即ち硬化前は含浸性が高い一方、硬化後は高い接着強度を発揮する塗料を含浸し硬化させることにより、上記溶射被膜に封孔処理を施しつつ該溶射被膜の強度を増強すると共に該溶射被膜の基材表面に対する付着強度の増強を図ることができる。又上記塗料は溶射被膜上に耐熱性・対候性が著しく良好で且つ高強度の塗膜を形成する。 In short, the metal spraying method according to the present invention is a method of performing metal spraying on the surface of a base material, and a silicone compound mixture containing an alkoxy group, a glycidic group and a polymer alkyl group on a sprayed coating formed by the spraying. A one-component paint consisting of 1: 1 and 7 weight ratio of hexamethyl (HDI) polyisocyanate, that is, a paint that has high impregnation before curing but exhibits high adhesive strength after curing. By impregnating and curing, it is possible to enhance the strength of the thermal spray coating while sealing the thermal spray coating, and to increase the adhesion strength of the thermal spray coating to the substrate surface. Further, the above-mentioned paint forms a high strength coating film with extremely good heat resistance and weather resistance on the sprayed coating.
　ここで上記シリコーン化合物に含有される高分子アルキル基について説明すると、高分子アルキル基とは炭素数が６～１０のアルキル基をいい、該高分子アルキル基は上記シリコーン化合物混合体とヘキサメチル系ポリイソシアネート等の他のポリマー、モノマーとの相溶性を著しく向上する。 Here, the polymer alkyl group contained in the silicone compound will be described. The polymer alkyl group means an alkyl group having 6 to 10 carbon atoms, and the polymer alkyl group is composed of the above-mentioned silicone compound mixture and a hexamethyl group polymer. The compatibility with other polymers and monomers such as isocyanate is remarkably improved.
　好ましくは、上記塗料に触媒としてチタンアルコラート又はスズ脂肪酸を配合し、該塗料を効率良く硬化反応させる。 Preferably, titanium alcoholate or tin fatty acid is blended as a catalyst with the paint, and the paint is efficiently cured.
　又上記シリコーン化合物混合体における上記アルコキシ基の割合を重量比で３５％～４０％とし、同シリコーン化合物混合体における上記グリシド基の割合を重量比で１０％～１５％とし、上記塗料の硬化反応性、強度物性、消泡性等の性能物性を向上する。加えて該シリコーン化合物混合体における上記高分子アルキル基の割合を重量比で１０％～２２％とすることにより、該シリコーン化合物混合体とヘキサメチル系ポリイソシアネートとの相溶性を著しく向上する。 Further, the proportion of the alkoxy group in the silicone compound mixture is 35% to 40% by weight, and the proportion of the glycid group in the silicone compound mixture is 10% to 15% by weight. Performance properties such as properties, strength properties, and defoaming properties. In addition, the compatibility of the silicone compound mixture and the hexamethyl polyisocyanate is remarkably improved by setting the ratio of the polymer alkyl group in the silicone compound mixture to 10% to 22% by weight.
　又上記シリコーン化合物混合体として、好ましくは長鎖アルキルアルコキシシランとグリシド基含有アルコキシシランの混合体を用いる。 Further, as the silicone compound mixture, a mixture of a long-chain alkylalkoxysilane and a glycid group-containing alkoxysilane is preferably used.
　本発明にあっては、基材がコンクリート又はモルタルの場合には、該基材内に埋設されている補強鉄筋と上記溶射被膜間を繋ぐ導電部材を設け、該導電部材の一端部を上記補強鉄筋に係合させると共に同他端部を上記基材の表面から突出させて上記溶射被膜内に埋設することにより、該溶射被膜と上記補強鉄筋間の通電を促し、有効に基材及び補強鉄筋を保護する。 In the present invention, when the base material is concrete or mortar, a conductive member that connects between the reinforcing steel bar embedded in the base material and the thermal spray coating is provided, and one end of the conductive member is reinforced by the reinforcement Engaging with the reinforcing bar and projecting the other end from the surface of the base material and embedding it in the thermal spray coating, energization between the thermal spray coating and the reinforcing steel bar is promoted, and the base material and the reinforcing steel bar are effectively provided. Protect.
　本発明に係る金属溶射方法によれば、アルコキシ基、グリシド基及び高分子アルキル基を含有するシリコーン化合物混合体とヘキサメチル系ポリイソシアネートとを１：１～７の重量比で配合した、硬化前は含浸性が高く硬化後は高い接着強度を発揮する塗料を溶射被膜に含浸し硬化させることにより、該塗料が溶射被膜に存する微細孔に入り込んで硬化して同微細孔を適切に封孔しつつ該溶射被膜自体の強度を増強できると共に、同塗料が上記溶射被膜の裏面と基材表面間に画成される微細空隙に充填され硬化し同溶射被膜の付着強度を増強することができる。 According to the metal spraying method of the present invention, a silicone compound mixture containing an alkoxy group, a glycid group and a polymer alkyl group and a hexamethyl polyisocyanate are blended at a weight ratio of 1: 1 to 7, before curing. By impregnating the coating with a high impregnation property and exhibiting high adhesive strength into the sprayed coating and curing it, the coating enters and cures the micropores existing in the sprayed coating while properly sealing the micropores. The strength of the sprayed coating itself can be increased, and the coating material can be filled and cured in fine voids defined between the back surface of the sprayed coating and the surface of the base material to enhance the adhesion strength of the sprayed coating.
　又上記塗料により溶射被膜の基材表面に対する付着強度を増強することができるため、基材がコンクリート又はモルタルの場合であっても、適切に基材表面に金属溶射を施すことができる。 In addition, since the adhesion strength of the sprayed coating to the substrate surface can be enhanced by the coating material, even if the substrate is concrete or mortar, metal spraying can be appropriately applied to the substrate surface.
基材表面に金属溶射を施し溶射被膜を形成した状態を模視的に示す断面図。Sectional drawing which shows typically the state which gave metal spraying to the base-material surface, and formed the sprayed coating. 溶射被膜に塗料を含浸し硬化させた状態を模視的に示す断面図。Sectional drawing which shows typically the state which impregnated the coating into the sprayed coating and hardened it. （Ａ）はコンクリート又はモルタルから成る基材に導電部材を設けた状態を基材を切欠して模視的に示す説明図、（Ｂ）は（Ａ）を側面視した説明図、（Ｃ）は導電部材の他例を示す断面図。(A) is explanatory drawing which shows the state which provided the electrically-conductive member in the base material which consists of concrete or mortar, notching a base material, (B) is explanatory drawing which looked at (A) from the side, (C) Sectional drawing which shows the other examples of an electrically-conductive member. コンクリート又はモルタルから成る基材表面に溶射被膜を形成し、該溶射被膜内に導電部材の他端部を埋設した状態を基材を切欠して模視的に示す説明図。Explanatory drawing which forms a sprayed coating on the base-material surface which consists of concrete or mortar, cuts a base material, and shows the state which embedded the other end part of the electrically-conductive member in this sprayed coating. コンクリート又はモルタルから成る基材表面に形成した溶射被膜に塗料を含浸し硬化させた状態を基材を切欠して模視的に示す説明図。Explanatory drawing which cuts a base material and shows typically the state which impregnated and hardened the sprayed coating formed in the base-material surface which consists of concrete or mortar. 図５の要部拡大断面図。The principal part expanded sectional view of FIG.
　以下本発明に係る金属溶射方法の実施形態を図１乃至図６に基づいて説明する。 Hereinafter, an embodiment of a metal spraying method according to the present invention will be described with reference to FIGS.
　図１に示すように、本発明に係る金属溶射方法にあっては、必要に応じて、基材１の表面１ａに対し既知のディスクサンダー等を用いてケレン処理を行い、汚れや油分、劣化した塗膜、浮きサビ等を除去し、該基材１の表面１ａに既知の溶射機を用いて金属溶射を行い溶射被膜２を形成する。 As shown in FIG. 1, in the metal spraying method according to the present invention, if necessary, the surface 1a of the base material 1 is subjected to keren treatment using a known disk sander or the like, so that dirt, oil, and deterioration The coated film, floating rust, and the like are removed, and metal spraying is performed on the surface 1a of the substrate 1 using a known spraying machine to form the sprayed coating 2.
　該溶射被膜２は５０～５００μｍの厚さになるように形成する。最も好ましい厚さは５０～１５０μｍである。 The sprayed coating 2 is formed so as to have a thickness of 50 to 500 μm. The most preferred thickness is 50 to 150 μm.
　上記溶射する金属としては、基材１が金属から成る場合には該基材１を構成する金属よりもイオン化傾向が大きい（卑なる）金属を用いる。例えば、基材１が鉄（鋼）で構成されている場合には、亜鉛、アルミニウム、マグネシウム又はこれらの合金等を溶射する。又基材１がコンクリート又はモルタルから成る場合にも、補強鉄筋（鉄）よりもイオン化傾向が大きい金属、即ち上記のように、亜鉛、アルミニウム、マグネシウム又はこれらの合金等を溶射する。尚本発明にあっては、特に溶射方式は問わない。 As the metal to be sprayed, a metal having a higher ionization tendency (base) than the metal constituting the base 1 is used when the base 1 is made of metal. For example, when the base material 1 is made of iron (steel), zinc, aluminum, magnesium, or an alloy thereof is sprayed. Also, when the substrate 1 is made of concrete or mortar, a metal having a higher ionization tendency than the reinforcing reinforcing bars (iron), that is, zinc, aluminum, magnesium, or an alloy thereof is sprayed as described above. In the present invention, the spraying method is not particularly limited.
　図１の状態では、溶射被膜２の裏面２ｂは基材表面１ａに密着している部分と、同基材表面１ａから離間して該基材表面１ａとの間に微細空隙４を画成している部分とが存し、該微細空隙４の存在により溶射被膜２の基材表面１ａに対する付着強度は弱い状態である。又溶射被膜２中には微細孔３が形成されている。 In the state of FIG. 1, the back surface 2b of the thermal spray coating 2 defines a fine gap 4 between the portion that is in close contact with the substrate surface 1a and the substrate surface 1a that is spaced apart from the substrate surface 1a. The adhesion strength of the thermal spray coating 2 to the substrate surface 1a is weak due to the presence of the fine voids 4. In addition, fine holes 3 are formed in the sprayed coating 2.
　本発明にあっては、図１の状態から、溶射被膜２の表面２ａにシリコーン化合物混合体とヘキサメチル系ポリイソシアネートとを配合して成る一液型且つ無溶剤型の塗料５をハケ、ローラ、スプレー等の既知塗布手段により塗布し、該溶射被膜２内に同塗料５を含浸する。 In the present invention, from the state of FIG. 1, a one-component and solventless paint 5 formed by blending a silicone compound mixture and hexamethyl polyisocyanate on the surface 2 a of the thermal spray coating 2 is removed by brush, roller, It is applied by a known application means such as spray, and the spray coating 2 is impregnated with the paint 5.
　上記シリコーン化合物混合体は、アルコキシ基、グリシド基及び高分子アルキル基（炭素数が６～１０のアルキル基）を含有し、好ましくは、該シリコーン化合物混合体における上記アルコキシ基の割合を重量比で３５％～４０％とし、同シリコーン化合物混合体における上記グリシド基の割合を重量比で１０％～１５％とし、上記塗料５の硬化反応性、強度物性、消泡性等の性能物性を向上する。加えて該シリコーン化合物混合体における上記高分子アルキル基の割合を重量比で１０％～２２％とすることにより、該シリコーン化合物混合体とヘキサメチル系ポリイソシアネートとの相溶性を著しく向上する。 The silicone compound mixture contains an alkoxy group, a glycid group, and a polymer alkyl group (alkyl group having 6 to 10 carbon atoms), and preferably the proportion of the alkoxy group in the silicone compound mixture is expressed by weight ratio. 35% to 40%, and the proportion of the glycid group in the silicone compound mixture is set to 10% to 15% by weight to improve the properties of the paint 5 such as curing reactivity, strength properties, and defoaming properties. . In addition, the compatibility of the silicone compound mixture and the hexamethyl polyisocyanate is remarkably improved by setting the ratio of the polymer alkyl group in the silicone compound mixture to 10% to 22% by weight.
　上記シリコーン化合物混合体の具体例としては長鎖アルキルアルコキシシランとグリシド基含有アルコキシシランの混合体が挙げられる。 Specific examples of the silicone compound mixture include a mixture of a long-chain alkylalkoxysilane and a glycid group-containing alkoxysilane.
　又上記シリコーン化合物混合体と上記ヘキサメチル系ポリイソシアネートは１：１～１：７の重量比で配合する。当該比率の範囲で配合することにより硬化前の含浸性と硬化後の接着強度を兼ね備えた塗料５とする。逆に言えば、当該比率の範囲外では所望の含浸性、接着強度を得ることができない。 The silicone compound mixture and the hexamethyl polyisocyanate are blended in a weight ratio of 1: 1 to 1: 7. By blending in the range of the ratio, a paint 5 having both the impregnation property before curing and the adhesive strength after curing is obtained. In other words, desired impregnation and adhesive strength cannot be obtained outside the range of the ratio.
　好ましくは上記塗料５中に触媒としてチタンアルコラート又はスズ脂肪酸を配合することにより、該塗料５を効率良く硬化反応させることができ、硬化時間を短縮できると共に有効に硬化させることができる。 Preferably, by blending titanium alcoholate or tin fatty acid as a catalyst in the paint 5, the paint 5 can be efficiently cured and cured, and the curing time can be shortened and effectively cured.
　上記塗料５はシリコーン化合物混合体が変質して生成されるシラノールと、ヘキサメチル系ポリイソシアネートが変質して生成されるポリウレアとが硬化反応して、硬化後は高い接着強度を発揮する。 In the paint 5, the silanol produced by modifying the silicone compound mixture and the polyurea produced by modifying the hexamethyl polyisocyanate undergo a curing reaction, and exhibit high adhesive strength after curing.
　又上記塗料５はシリコーン化合物混合体の量を調整し気温２５℃で５０～５００ｍＰａ・ｓ、好ましくは２００ｍＰａ・ｓ以下の低粘度の液体となるように調整する。 In addition, the amount of the silicone compound mixture is adjusted so that the paint 5 becomes a low-viscosity liquid having a temperature of 25 ° C. and a viscosity of 50 to 500 mPa · s, preferably 200 mPa · s or less.
　上記のように含浸性が高く且つ低粘度である塗料５は、図２に示すように、溶射被膜２に形成されている微細孔３に容易に入り込むと共に、該微細孔３を通じ、上記した溶射被膜裏面２ｂと基材表面１ａ間に画成された微細空隙４に容易に達し同微細空隙４内に充填され硬化する。 The coating 5 having a high impregnation property and low viscosity as described above easily enters the micropores 3 formed in the sprayed coating 2 as shown in FIG. The fine voids 4 defined between the coating back surface 2b and the substrate surface 1a are easily reached, filled in the fine voids 4 and cured.
　そして、上記塗料５は微細孔３内で隙間なく硬化する共に、微細空隙４内で隙間なく硬化し硬化後には高い接着強度を発揮する。同微細空隙４内で硬化した塗料５は基材表面１ａと強固に接着すると共に溶射被膜２にアンカー効果を付与する。又上記塗料５の未含浸分は上記溶射被膜２の表面２ａ上に耐熱性・対候性が良好で且つ強固な塗膜５′を形成する。 The paint 5 hardens without gaps in the micropores 3 and cures without gaps in the microvoids 4 and exhibits high adhesive strength after curing. The paint 5 cured in the fine gap 4 firmly adheres to the substrate surface 1 a and gives an anchor effect to the sprayed coating 2. Further, the unimpregnated portion of the paint 5 forms a strong coating film 5 ′ having good heat resistance and weather resistance on the surface 2 a of the thermal spray coating 2.
　即ち、上記塗料５は微細孔３に入り込んで硬化することにより、該微細孔３を適切に封孔すると同時に溶射被膜２自体の強度を増強する。加えて溶射被膜裏面２ｂと基材表面１ａ間の微細空隙４に充填され硬化することにより溶射被膜２と基材表面１ａとを強固に結合して基材表面１ａに対する付着強度を増強することができる。又溶射被膜２の表面２ａ上に塗膜５′を形成し該溶射被膜２を適切に保護する。 That is, the coating material 5 penetrates into the fine holes 3 and hardens, thereby appropriately sealing the fine holes 3 and at the same time enhancing the strength of the sprayed coating 2 itself. In addition, the fine gap 4 between the sprayed coating back surface 2b and the substrate surface 1a is filled and cured, thereby firmly bonding the sprayed coating 2 and the substrate surface 1a to enhance the adhesion strength to the substrate surface 1a. it can. Further, a coating film 5 ′ is formed on the surface 2 a of the sprayed coating 2 to appropriately protect the sprayed coating 2.
　又本発明に係る金属溶射方法にあっては、図１・図２に示す如く、溶射被膜２の裏面２ｂの一部は基材１の表面１ａに密着しており、基材１が金属の場合には、基材１から溶射被膜２への電流の流れが阻害されることはなく、基材１の金属よりイオン化傾向の大きい金属から成る溶射被膜２が犠牲となって溶解し、適切に基材１を保護する。 In the metal spraying method according to the present invention, as shown in FIGS. 1 and 2, a part of the back surface 2b of the sprayed coating 2 is in close contact with the surface 1a of the substrate 1, and the substrate 1 is made of metal. In this case, the current flow from the base material 1 to the thermal spray coating 2 is not hindered, and the thermal spray coating 2 made of a metal having a higher ionization tendency than the metal of the base material 1 is dissolved at the expense of The substrate 1 is protected.
　又基材１がコンクリート又はモルタルの場合には、図３乃至図６に示すように、基材１内に埋設されている補強鉄筋７と溶射被膜２間を繋ぐボルト、アンカーピン等の導電部材６を設け、該補強鉄筋７と溶射被膜２間の通電を促し、該溶射被膜２が犠牲陽極となって有効に基材１及び上記補強鉄筋７を保護する。 When the base material 1 is concrete or mortar, as shown in FIGS. 3 to 6, conductive members such as bolts and anchor pins that connect between the reinforcing reinforcing bars 7 embedded in the base material 1 and the thermal spray coating 2 are used. 6 is provided, energization between the reinforcing reinforcing bar 7 and the thermal spray coating 2 is promoted, and the thermal spray coating 2 serves as a sacrificial anode to effectively protect the substrate 1 and the reinforcing reinforcing bar 7.
　詳述すると、図３（Ａ）・（Ｂ）に示すように、まず基材１に孔を穿設し、該孔に導電部材６たるボルトを差し入れ、該導電部材６の一端部６ａを基材１内に埋設されている補強鉄筋７（横筋７ａ）と接触させ係合させると共に同他端部６ｂを基材１の表面１ａから突出させた状態にし、上記孔に注入する接着剤等で固定する。 More specifically, as shown in FIGS. 3A and 3B, first, a hole is formed in the substrate 1, a bolt as the conductive member 6 is inserted into the hole, and one end portion 6a of the conductive member 6 is used as a base. With the adhesive etc. which inject | pour into the state which made the other end part 6b protrude from the surface 1a of the base material 1 while making it contact and engage with the reinforcement reinforcement 7 (horizontal reinforcement 7a) embed | buried in the material 1 Fix it.
　又は具体的には図示しないが、基材１の表層を補強鉄筋７が露出するまでハツリ、導電部材６の一端部６ａと補強鉄筋７とを結束した後、上記ハツった部分をモルタルで埋戻すことにより導電部材６を固定しても良い。 Or, although not specifically shown, the surface layer of the base material 1 is peeled until the reinforcing reinforcing bar 7 is exposed, and the one end portion 6a of the conductive member 6 and the reinforcing reinforcing bar 7 are bound, and then, the above-mentioned damaged portion is filled with mortar. The conductive member 6 may be fixed by returning it.
　又導電部材６の他例として、図３（Ｃ）に示すように、一端部６ａが拡開するアンカーピンを導電部材６として利用し、該一端部６ａを拡開させて補強鉄筋７（横筋７ａ）と係合させることも実施に応じ任意である。 Further, as another example of the conductive member 6, as shown in FIG. 3C, an anchor pin whose one end portion 6a is expanded is used as the conductive member 6, and the one end portion 6a is expanded to reinforce the reinforcing bar 7 (horizontal bar). Engaging with 7a) is optional depending on the implementation.
　なお、図３（Ａ）乃至（Ｃ）は導電部材６の一端部６ａを補強鉄筋７の内、横筋７ａのみと係合させた例を示しているが、これに加えて縦筋７ｂとも係合させる場合若しくは縦筋７ｂのみと係合させる場合も、実施に応じ任意である。又本発明における導電部材６の一端部６ａと補強鉄筋７との係合は、該導電部材６と補強鉄筋７間で通電可能であれば、特に形態は問わない。 3A to 3C show an example in which one end portion 6a of the conductive member 6 is engaged only with the horizontal reinforcing bar 7a of the reinforcing reinforcing bars 7, but in addition to this, the vertical reinforcing bar 7b is also related. The case of combining them or the case of engaging only with the vertical bars 7b is optional depending on the implementation. Further, the engagement between the one end portion 6a of the conductive member 6 and the reinforcing bar 7 in the present invention is not particularly limited as long as it is possible to energize between the conductive member 6 and the reinforcing bar 7.
　次いで、図４に示すように、基材表面１ａに金属溶射を施す際に、上記導電部材６の他端部６ｂ上にも金属溶射を施し、形成された溶射被膜２内に該導電部材６の他端部６ｂを埋設し、上記補強鉄筋７と溶射被膜２間を繋ぐ。 Next, as shown in FIG. 4, when metal spraying is performed on the substrate surface 1 a, metal spraying is also performed on the other end portion 6 b of the conductive member 6, and the conductive member 6 is formed in the sprayed coating 2 formed. The other end portion 6b is buried, and the reinforcing reinforcing bar 7 and the thermal spray coating 2 are connected.
　あとは、図５に示すように、上記形成した溶射被膜２の表面２ａに上記塗料５を塗布し、該溶射被膜２内に同塗料５を含浸する。 After that, as shown in FIG. 5, the paint 5 is applied to the surface 2 a of the sprayed coating 2 formed and the sprayed coating 2 is impregnated with the paint 5.
　この場合にも、図６に示すように、上記塗料５は溶射被膜２の微細孔３内で隙間なく硬化する共に、微細空隙４内で隙間なく硬化し硬化後には高い接着強度を発揮する。同微細空隙４内で硬化した塗料５は基材表面１ａと強固に接着すると共に溶射被膜２にアンカー効果を付与する。 Also in this case, as shown in FIG. 6, the coating 5 hardens without gaps in the fine holes 3 of the thermal spray coating 2, and cures without gaps in the fine gaps 4, and exhibits high adhesive strength after curing. The paint 5 cured in the fine gap 4 firmly adheres to the substrate surface 1 a and gives an anchor effect to the sprayed coating 2.
　又図６中で５′′として示すように、上記塗料５の一部は基材表面１ａに染み込んで硬化し、上記微細空隙４内で硬化した塗料５と一体化して、上記アンカー効果を補完する。更には上記塗料５の未含浸分は上記溶射被膜２の表面２ａ上に耐熱性・対候性が良好で且つ強固な塗膜５′を形成する。 Also, as indicated by 5 ″ in FIG. 6, a part of the paint 5 soaks into the substrate surface 1a and hardens, and is integrated with the paint 5 hardened in the fine gap 4 to complement the anchor effect. To do. Further, the unimpregnated portion of the coating 5 forms a strong coating film 5 ′ having good heat resistance and weather resistance on the surface 2 a of the thermal spray coating 2.
　上記のとおり、基材１がコンクリート又はモルタルの場合にも溶射被膜２の付着強度の増強を図ることができると共に、溶射被膜２と補強鉄筋７間を繋ぎ両者間の通電を促す導電部材６を設けることにより、溶射被膜２が犠牲陽極となって有効に基材１及び補強鉄筋７を保護する。 As described above, even when the base material 1 is concrete or mortar, the adhesion strength of the thermal spray coating 2 can be increased, and the conductive member 6 that connects the thermal spray coating 2 and the reinforcing reinforcing bars 7 and promotes energization therebetween is provided. By providing, the sprayed coating 2 becomes a sacrificial anode and effectively protects the base material 1 and the reinforcing steel bars 7.
　以上説明したように、本発明に係る金属溶射方法にあっては、従来のように、アンカー効果を得るために基材表面に凹凸形状を付与する前処理は不要である。 As described above, in the metal spraying method according to the present invention, as in the prior art, a pretreatment for imparting an uneven shape to the substrate surface is not required in order to obtain an anchor effect.
　そして、凹凸形状を付与しない基材の表面に直接金属溶射を施し、溶射被膜形成後に硬化前は含浸性が高く且つ低粘度であり硬化後は高度の接着強度を発揮する塗料を微細孔を通じて含浸し、該微細孔の封孔、上記溶射被膜自体の強度増強及び上記溶射被膜の基材表面に対する付着強度増強を同時に図る比類なき溶射方法である。 The surface of the base material that does not give the uneven shape is directly metal sprayed, and after forming the sprayed coating, it is impregnated through fine holes with a coating that has high impregnation and low viscosity before curing and exhibits high adhesive strength after curing. In addition, this is a unique thermal spraying method that simultaneously seals the fine holes, increases the strength of the thermal spray coating itself, and increases the adhesion strength of the thermal spray coating to the substrate surface.
　又既知の方式で基材表面に金属溶射を施し、該溶射により形成した溶射被膜に塗料を塗布し含浸させる簡易な方法であるため、特に既設構造物に金属溶射を行う際には現場で容易に実施でき効果的である。 In addition, it is a simple method in which metal spraying is performed on the surface of the substrate by a known method, and the sprayed coating formed by the spraying is applied and impregnated. Can be implemented effectively.
　更に基材１がコンクリート又はモルタルである場合にも、該基材の表面に適切に溶射被膜を形成し、該溶射被膜の基材表面に対する付着強度を増強できると共に、該溶射被膜と基材内の補強鉄筋を繋ぐ導電部材によって有効に基材及び補強鉄筋を保護することができる。 Furthermore, even when the base material 1 is concrete or mortar, it is possible to appropriately form a sprayed coating on the surface of the base material to enhance the adhesion strength of the sprayed coating to the surface of the base material. The base member and the reinforcing reinforcing bar can be effectively protected by the conductive member connecting the reinforcing reinforcing bars.
　尚本書面において、下限値と上限値間を「～」で示した数値範囲は、該下限値と上限値間の全ての数値（整数値と小数値）を表したものである。請求項の記載においても同様である。 In this document, the numerical range indicated by “˜” between the lower limit value and the upper limit value represents all numerical values (integer value and decimal value) between the lower limit value and the upper limit value. The same applies to the claims.
１…基材、１ａ…基材表面、２…溶射被膜、２ａ…溶射被膜表面、２ｂ…溶射被膜裏面、３…微細孔、４…微細空隙、５…塗料、５′…塗膜、５′′…基材内に含浸し硬化した塗料、６…導電部材、６ａ…導電部材の一端部、６ｂ…導電部材の他端部（突出部）、７…補強鉄筋、７ａ…横筋、７ｂ…縦筋。 DESCRIPTION OF SYMBOLS 1 ... Base material, 1a ... Base material surface, 2 ... Thermal spray coating surface, 2a ... Thermal spray coating surface, 2b ... Thermal spray coating back surface, 3 ... Fine hole, 4 ... Fine space | gap, 5 ... Paint, 5 '... Coating film, 5' '... Paint that has been impregnated and cured in the substrate, 6 ... Conductive member, 6a ... One end of the conductive member, 6b ... The other end of the conductive member (protrusion), 7 ... Reinforcing bar, 7a ... Transverse, 7b ... Vertical muscle.

Claims (5)

  1. 　基材の表面に金属溶射を行い、該溶射により形成された溶射被膜に、アルコキシ基、グリシド基及び高分子アルキル基を含有するシリコーン化合物混合体とヘキサメチル系ポリイソシアネートとを１：１～７の重量比で配合して成る一液型塗料を含浸し硬化させることにより、上記溶射被膜に封孔処理を施しつつ該溶射被膜の強度を増強すると共に該溶射被膜の基材表面に対する付着強度の増強を図ることを特徴とする金属溶射方法。 Metal spraying is performed on the surface of the base material, and a silicone compound mixture containing an alkoxy group, a glycid group and a polymer alkyl group and a hexamethyl polyisocyanate are applied to the sprayed coating formed by the spraying in a ratio of 1: 1 to 7. By impregnating and curing a one-component paint blended at a weight ratio, the sprayed coating is subjected to sealing treatment to enhance the strength of the sprayed coating and increase the adhesion strength of the sprayed coating to the substrate surface. The metal spraying method characterized by aiming at.
  2. 　上記塗料に触媒としてチタンアルコラート又はスズ脂肪酸を配合することを特徴とする請求項１記載の金属溶射方法。 2. The metal spraying method according to claim 1, wherein titanium alcoholate or tin fatty acid is blended as a catalyst with the paint.
  3. 　上記シリコーン化合物混合体における上記アルコキシ基の割合は重量比で３５％～４０％であり、同シリコーン化合物混合体における上記グリシド基の割合は重量比で１０％～１５％であり、同シリコーン化合物混合体における上記高分子アルキル基の割合は重量比で１０％～２２％であることを特徴とする請求項１又は請求項２に記載の金属溶射方法。 The proportion of the alkoxy group in the silicone compound mixture is 35% to 40% by weight, and the proportion of the glycid group in the silicone compound mixture is 10% to 15% by weight. The metal spraying method according to claim 1 or 2, wherein the ratio of the polymer alkyl group in the body is 10% to 22% by weight.
  4. 　上記シリコーン化合物混合体が長鎖アルキルアルコキシシランとグリシド基含有アルコキシシランの混合体であることを特徴とする請求項１乃至請求項３の何れかに記載の金属溶射方法。 The metal spraying method according to any one of claims 1 to 3, wherein the silicone compound mixture is a mixture of a long-chain alkylalkoxysilane and a glycid group-containing alkoxysilane.
  5. 　基材がコンクリート又はモルタルの場合には、該基材内に埋設されている補強鉄筋と上記溶射被膜間を繋ぐ導電部材を設け、該導電部材の一端部を上記補強鉄筋に係合させると共に同他端部を上記基材の表面から突出させて上記溶射被膜内に埋設することを特徴とする請求項１乃至請求項４の何れかに記載の金属溶射方法。 When the base material is concrete or mortar, a conductive member is provided to connect between the reinforcing steel bar embedded in the base material and the sprayed coating, and one end portion of the conductive member is engaged with the reinforcing steel bar. The metal spraying method according to any one of claims 1 to 4, wherein the other end is projected from the surface of the substrate and embedded in the sprayed coating.
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