CN104006228B - A kind of modified epoxy Coated Steels moulds composite gas pipe and preparation method thereof - Google Patents
A kind of modified epoxy Coated Steels moulds composite gas pipe and preparation method thereof Download PDFInfo
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- CN104006228B CN104006228B CN201410212788.2A CN201410212788A CN104006228B CN 104006228 B CN104006228 B CN 104006228B CN 201410212788 A CN201410212788 A CN 201410212788A CN 104006228 B CN104006228 B CN 104006228B
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- 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
- F16L9/00—Rigid pipes
- F16L9/14—Compound tubes, i.e. made of materials not wholly covered by any one of the preceding groups
- F16L9/147—Compound tubes, i.e. made of materials not wholly covered by any one of the preceding groups comprising only layers of metal and plastics with or without reinforcement
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D23/00—Producing tubular articles
- B29D23/001—Pipes; Pipe joints
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/02—Elements
- C08K3/04—Carbon
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/02—Elements
- C08K3/08—Metals
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K3/2279—Oxides; Hydroxides of metals of antimony
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D163/00—Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/18—Fireproof paints including high temperature resistant paints
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/24—Electrically-conducting paints
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2296—Oxides; Hydroxides of metals of zinc
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/001—Conductive additives
Abstract
The invention provides a kind of underground coal mine modified epoxy Coated Steels and mould composite gas pipe and preparation method thereof, modified epoxy Coated Steels mould composite gas pipe be by by modified epoxy resin power paint electrostatic spraying in the steel pipe through acid washing phosphorization process, then sintering after formed.The parts by weight of each component of modified epoxy resin power paint are: the brominated bisphenol a type epoxy resin of bromine content >=50% 100 parts, curing agent 20-40 part, pigment 10-50 part, anti-static agent 10-50 part, fire retardant 5-10 part, degasser 0.5-1.0 part, gas-phase silica 0.5-0.8 part, filler 0-50 part.The modified epoxy Coated Steels that the present invention makes moulds composite gas pipe, high comprehensive performance, and cost performance is high.
Description
Technical field
The present invention relates to steel-plastic composite pipe, be specifically related to a kind of modified epoxy Coated Steels that can be applicable to underground coal mine and mould composite gas pipe and preparation method thereof.
Background technique
At present, the gas drainage pipe in colliery can be divided into nonmetal pipeline and steel pipe, and nonmetal pipeline mainly comprises Glass Steel Tube, PVC＝polyvinyl chloride (PVC) pipe, polyethylene (PE) pipe, skeleton dural-phase contrast scan, Glass Steel Tube is easily cracked, and flame retardant property is poor, disabled; The pressure-bearing of PVC＝polyvinyl chloride (PVC) pipe, polyethylene (PE) pipe is not strong, and ageing-resistant performance is poor; Still there is the defects such as intensity is low, easy creep in steel band/steel wire composite plastic pipe.At present, the gas drainage pipe in colliery is mostly steel pipe, for overcome that steel pipe itself exists easily get rusty, the defect of burn into high pollution, usually in steel tube surface plastic-coated or coating, to improve its working life and safety.
Chinese patent CN201014071 discloses a kind of Compound Steel Pipe Covered with Polythene Coating Used in Undergound Colliery, is compounded with anti-electrostatic flame-retardant polyvinyl coating in the inner and outer circumferential surfaces of steel pipe.The high molecule plastic impact resistance of Steel-plastic compound pipe of PP is not high, easily comes off after being impacted in transport and installing engineering.Existing epoxy coating only possesses good corrosion resistance usually, and has higher requirement for the flame retarding of coating to coating of coal mine gas pipe.
Summary of the invention
The technical problem to be solved in the present invention is that providing a kind of can be used for underground coal mine epoxy resin steel plastic compount gas pipe with excellent flame retardant performance and preparation method thereof.
For solving the problem, the invention provides a kind of modified epoxy Coated Steels and moulding composite gas pipe and preparation method thereof.Described modified epoxy coating utilizes the cooperative flame retardant effect of brominated bisphenol a type epoxy resin and fire retardant, improves coating flame retardant property; By adding anti-static agent or selecting conductive pigment, ensure the anti-static electricity property of coating.Working process is by steel pipe through acid washing phosphorization process, and surface forms one deck phosphating coat, then at steel pipe inner and outer surface electrostatic spraying epoxy coating, forms epoxy resin steel-plastic structure after sintering.Concrete technological scheme is as follows:
The present invention is that a kind of modified epoxy Coated Steels moulds composite gas pipe, comprise the modified epoxy coating being attached to steel pipe inner and outer surface, described modified epoxy coating is made up of the brominated bisphenol a type epoxy resin of bromine content >=50%, curing agent, pigment, anti-static agent, fire retardant, degasser, gas-phase silica and filler, and the parts by weight of described each component are:
The brominated bisphenol a type epoxy resin of bromine content >=50% 100 parts,
Curing agent 20-40 part,
Pigment 10-50 part,
Anti-static agent 10-50 part,
Fire retardant 5-10 part,
Degasser 0.5-1.0 part,
Gas-phase silica 0.5-0.8 part,
Filler 0-50 part;
Described curing agent is phenolic resin or modified dicyandiamine, described anti-static agent is one or more mixtures in electrically conductive graphite, carbon black, metallic dust, doping stannic oxide and doping zinc-oxide, described fire retardant is one or more mixtures in antimonous oxide, triphenyl phosphate, eight bromo ether and hexabromo-Cyclododecane, and described degasser is styrax or Tissuemat E.Described filler is the one in barium sulphate, white clay, wollastonite.
Another object of the present invention is to provide and makes the method that above-mentioned modified epoxy Coated Steels moulds composite gas pipe, comprises the following steps:
by each composition weight number of modified epoxy coating by modified epoxy, curing agent, pigment, anti-static agent, fire retardant, degasser, gas-phase silica and filler after mixed at high speed, gained homogeneous mixture is added in single screw extrusion machine or double screw extruder and extrudes.Extrusion press machine cavity temperature is 70-85 DEG C, and extruder head temperature is 95 DEG C.Extrudate is obtained by compressing tablet, cooling, pulverizing, screening the powder coating that particle diameter is 35-55um.
by the steel pipe after surperficial scale removal through washing 1-3min, then the chlorohydric acid pickling 15-25min of 70% is used, wash 1-3min again, then carry out table and adjust 2-3min, table adjusts pH to be 8-9, and then carry out phosphorating treatment 15-30min, Phosphating Solution pH is 2.5, carry out washing 1-3min post-passivation 1min sector-style of going forward side by side again to do, now form the phosphating coat of one deck 2-3um charcoal or black gray expandable in steel tube surface.
lift to electrostatic spraying apparatus after air-dry for the steel pipe after acid washing phosphorization, inside and outside spraying is carried out to steel pipe.
steel pipe after electrostatic spraying is sent into sintering furnace solidification, solidifying temperature is 170-200 DEG C, and the time is 30-45min, forms modified epoxy Coated Steels and moulds composite gas pipe.
Beneficial effect of the present invention is: the modified epoxy Coated Steels that the present invention makes moulds composite gas pipe, high comprehensive performance, and cost performance is high.Advantage of the present invention is mainly reflected in:
1, mechanics, excellent anti-corrosion performance
Carrying out electrostatic spraying through parkerized steel pipe inner and outer surface simultaneously, forming epoxy steel after sintering and mould pipe.This epoxy coating thickness G reatT.GreaT.GT 400um, hardness >=2H, impact strength >=50k part cm, coating adhesion 1 grade.Pipe moulded by epoxy steel can acid-alkali-corrosive-resisting, salt fog > 800h in resistance to, is specially adapted to underground coal mine conveying gas and corrosive gas.
2, excellent fireproof performance
By the brominated bisphenol a type epoxy resin of brominated amount >=50% and the cooperative flame retardant of interpolation fire retardant, obtain the epoxy coating of excellent fireproof performance, its flame retardant property index reaches: flaming combustion time is: 1 sample monodrome≤5s, the arithmetic mean value≤3s of 6 samples; Glowing time is: 1 sample monodrome is 0s, and the arithmetic mean value of 6 samples is 0s.
3, anti-static electricity property is given prominence to
One or more mixtures in electrically conductive graphite, carbon black, metallic dust, doping stannic oxide and doping zinc-oxide selected by anti-static agent, and anti-static electricity property is given prominence to, pipeline inner and outer surface resistance≤1 × 10
6Ω.
Embodiment
Technological scheme of the present invention is further described below by specific embodiment.
Embodiment 1
The brominated bisphenol a type epoxy resin of 100 parts of bromine content >=50%, 30 parts of phenolic resin, 30 parts of conductive blacks, 5 parts of antimonous oxides, 0.5 part of styrax, 0.6 part of gas-phase silica, this homogeneous mixture, after mixed at high speed, is added in singe screw and extrudes by 20 parts of barium sulphate.Machine cavity temperature is 70 DEG C, and the temperature of extruder head is 95 DEG C.By the powder coating that the particle diameter of extrudate compressing tablet, cooling, pulverizing, screening is 40 microns.
By the steel pipe after surperficial scale removal through washing 2min, then the chlorohydric acid pickling 20min of 70% is used, wash 2min again, then carry out table and adjust 2min, table adjusts pH to be 8.5, and then carry out phosphorating treatment 20min, Phosphating Solution pH is 2.5, carry out again washing 2min post-passivation 1min go forward side by side sector-style do, now form one deck 2.5um charcoal phosphating coat in steel tube surface.
Lifting spray-coating apparatus, carries out inside and outside electrostatic spraying to steel pipe after phosphatization respectively, and 180 DEG C of solidification 40min in sintering furnace, form modified epoxy Coated Steels and mould composite gas pipe, its main performance index is in table 1.
Embodiment 2
100 parts of brominated bisphenol A epoxy resins, 25 parts of phenolic resin, 25 parts of conductive blacks, 3 parts of antimonous oxides, 2 parts of eight bromo ethers, 0.8 part of styrax, 0.7 part of gas-phase silica, this homogeneous mixture, after mixed at high speed, is added in singe screw and extrudes by 40 parts of barium sulphate.Machine cavity temperature is 80 DEG C, and the temperature of extruder head is 95 DEG C.Be the powder coating of 45um by the particle diameter of extrudate compressing tablet, cooling, pulverizing, screening.
By the steel pipe after surperficial scale removal through washing 2min, then the chlorohydric acid pickling 25min of 70% is used, wash 2min again, then carry out table and adjust 2.5min, table adjusts pH to be 8.5, and then carry out phosphorating treatment 25min, Phosphating Solution pH is 2.5, carry out again washing 2min post-passivation 1min go forward side by side sector-style do, now form one deck 2.0um charcoal phosphating coat in steel tube surface.
Lifting spray-coating apparatus, carries out inside and outside electrostatic spraying to steel pipe after phosphatization respectively, and 170 DEG C of solidification 45min in sintering furnace, form modified epoxy Coated Steels and mould composite gas pipe, its main performance index is in table 1.
Embodiment 3
100 parts of brominated bisphenol A epoxy resins, 30 parts of phenolic resin, 20 parts of electrically conductive graphites, 4 parts of antimonous oxides, 3 parts of eight bromo ethers, 0.7 part of styrax, 0.6 part of gas-phase silica, this homogeneous mixture, after mixed at high speed, is added in singe screw and extrudes by 45 parts of barium sulphate.Machine cavity temperature is 85 DEG C, and the temperature of extruder head is 95 DEG C.Be the powder coating of 50um by the particle diameter of extrudate compressing tablet, cooling, pulverizing, screening.
By the steel pipe after surperficial scale removal through washing 2min, then the chlorohydric acid pickling 25min of 70% is used, wash 1min again, then carry out table and adjust 3min, table adjusts pH to be 9.0, and then carry out phosphorating treatment 25min, Phosphating Solution pH is 2.5, carry out again washing 2min post-passivation 1min go forward side by side sector-style do, now form one deck 2.5um charcoal phosphating coat in steel tube surface.
Lifting spray-coating apparatus, carries out inside and outside electrostatic spraying to steel pipe after phosphatization respectively, and 180 DEG C of solidification 40min in sintering furnace, form modified epoxy Coated Steels and mould composite gas pipe, its main performance index is in table 1.
Embodiment 4
100 parts of brominated bisphenol A epoxy resins, 40 parts of phenolic resin, 30 parts of iron oxide reds, 40 parts of aluminium powders, 5 parts of antimonous oxides, 2 parts of eight bromo ethers, 0.9 part of styrax, 0.6 part of gas-phase silica, this homogeneous mixture, after mixed at high speed, is added in singe screw and extrudes by 20 parts of white clay.Machine cavity temperature is 80 DEG C, and the temperature of extruder head is 95 DEG C.Be the powder coating of 45um by the particle diameter of extrudate compressing tablet, cooling, pulverizing, screening.
By the steel pipe after surperficial scale removal through washing 2.5min, then the chlorohydric acid pickling 20min of 70% is used, wash 2.5min again, then carry out table and adjust 2.5min, table adjusts pH to be 8.0, and then carry out phosphorating treatment 25min, Phosphating Solution pH is 2.5, carry out again washing 2.5min post-passivation 1min go forward side by side sector-style do, now form one deck 2.5um charcoal phosphating coat in steel tube surface.
Lifting spray-coating apparatus, carries out inside and outside electrostatic spraying to steel pipe after phosphatization respectively, and 185 DEG C of solidification 30min in sintering furnace, form modified epoxy Coated Steels and mould composite gas pipe, its main performance index is in table 1.
Embodiment 5
100 parts of brominated bisphenol A epoxy resins, 3.5 parts of modified dicyandiamine, 30 parts of iron oxide reds, 30 parts of aluminium powders, 10 parts of doping stannic oxides, 5 parts of antimonous oxides, 3 portions of triphenyl phosphates, 0.8 part of Tissuemat E, 0.8 part of gas-phase silica, this homogeneous mixture, after mixed at high speed, is added in twin-screw and extrudes by 20 parts of wollastonites.Machine cavity temperature is 80 DEG C, and the temperature of extruder head is 95 DEG C.Be the powder coating of 40um by the particle diameter of extrudate compressing tablet, cooling, pulverizing, screening.
By the steel pipe after surperficial scale removal through washing 2.5min, then the chlorohydric acid pickling 25min of 70% is used, wash 2.0min again, then carry out table and adjust 2.0min, table adjusts pH to be 8.0, and then carry out phosphorating treatment 25min, Phosphating Solution pH is 2.5, carry out again washing 2min post-passivation 1min go forward side by side sector-style do, now form one deck 3.0um charcoal phosphating coat in steel tube surface.
Lifting spray-coating apparatus, carries out inside and outside electrostatic spraying to steel pipe after phosphatization respectively, and 200 DEG C of solidification 30min in sintering furnace, form modified epoxy Coated Steels and mould composite gas pipe, its main performance index is in table 1.
Embodiment 6
100 parts of brominated bisphenol A epoxy resins, 3 parts of modified dicyandiamine, 35 portions of ultramarines, 30 parts of aluminium powders, 10 parts of doping stannic oxides, 4 parts of antimonous oxides, 4 portions of triphenyl phosphates, 0.7 part of Tissuemat E, 0.8 part of gas-phase silica, this homogeneous mixture, after mixed at high speed, is added in twin-screw and extrudes by 25 parts of wollastonites.Machine cavity temperature is 85 DEG C, and the temperature of extruder head is 95 DEG C.Be the powder coating of 45um by the particle diameter of extrudate compressing tablet, cooling, pulverizing, screening.
By the steel pipe after surperficial scale removal through washing 3.0min, then the chlorohydric acid pickling 25min of 70% is used, wash 2.0min again, then carry out table and adjust 2.0min, table adjusts pH to be 9.0, and then carry out phosphorating treatment 30min, Phosphating Solution pH is 2.5, carry out again washing 1min post-passivation 1min go forward side by side sector-style do, now form one deck 3.0um charcoal phosphating coat in steel tube surface.
Lifting spray-coating apparatus, carries out inside and outside electrostatic spraying to steel pipe after phosphatization respectively, and 200 DEG C of solidification 30min in sintering furnace, form modified epoxy Coated Steels and mould composite gas pipe, its main performance index is in table 1.
Embodiment 7
100 parts of brominated bisphenol A epoxy resins, 4 parts of modified dicyandiamine, 30 parts of iron oxide yellows, 25 parts of aluminium powders, 10 parts of doping stannic oxides, 10 parts of doping, zine oxide, 5 parts of antimonous oxides, 2 portions of triphenyl phosphates, 0.7 part of Tissuemat E, 0.8 part of gas-phase silica, this homogeneous mixture, after mixed at high speed, is added in twin-screw and extrudes by 20 parts of wollastonites.Machine cavity temperature is 80 DEG C, and the temperature of extruder head is 95 DEG C.Be the powder coating of 50um by the particle diameter of extrudate compressing tablet, cooling, pulverizing, screening.
By the steel pipe after surperficial scale removal through washing 2.0min, then the chlorohydric acid pickling 30min of 70% is used, wash 2.0min again, then carry out table and adjust 3.0min, table adjusts pH to be 9.0, and then carry out phosphorating treatment 30min, Phosphating Solution pH is 2.5, carry out again washing 2min post-passivation 1min go forward side by side sector-style do, now form one deck 2.0um charcoal phosphating coat in steel tube surface.
Lifting spray-coating apparatus, carries out inside and outside electrostatic spraying to steel pipe after phosphatization respectively, and 190 DEG C of solidification 30min in sintering furnace, form modified epoxy Coated Steels and mould composite gas pipe, its main performance index is in table 1.
Embodiment 8
100 parts of brominated bisphenol A epoxy resins, 5 parts of modified dicyandiamine, 35 parts of iron oxide yellows, 35 parts of aluminium powders, 10 parts of doping stannic oxides, 5 parts of antimonous oxides, 2 parts of hexabromo-Cyclododecane, 0.8 part of Tissuemat E, 0.9 part of gas-phase silica, this homogeneous mixture, after mixed at high speed, is added in twin-screw and extrudes by 25 parts of wollastonites.Machine cavity temperature is 85 DEG C, and the temperature of extruder head is 95 DEG C.Be the powder coating of 45um by the particle diameter of extrudate compressing tablet, cooling, pulverizing, screening.
By the steel pipe after surperficial scale removal through washing 1.5min, then the chlorohydric acid pickling 25min of 70% is used, wash 2.5min again, then carry out table and adjust 2.0min, table adjusts pH to be 8.0, and then carry out phosphorating treatment 25min, Phosphating Solution pH is 2.5, carry out again washing 1.5min post-passivation 1min go forward side by side sector-style do, now form one deck 2.0um charcoal phosphating coat in steel tube surface.
Lifting spray-coating apparatus, carries out inside and outside electrostatic spraying to steel pipe after phosphatization respectively, and 185 DEG C of solidification 35min in sintering furnace, form modified epoxy Coated Steels and mould composite gas pipe, its main performance index is in table 1.
The above; be only the better embodiment of the present invention, but scope is not limited thereto, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; the change that can expect easily or replacement, all should be encompassed within protection scope of the present invention.Therefore scope is as the criterion with the protection domain of claims.
table 1 modified epoxy Coated Steels moulds composite gas pipe coating main performance
Claims (2)
1. a modified epoxy Coated Steels moulds composite gas pipe, comprise the modified epoxy coating being attached to steel pipe inner and outer surface, it is characterized in that, described modified epoxy coating is made up of the brominated bisphenol a type epoxy resin of bromine content >=50%, curing agent, pigment, anti-static agent, fire retardant, degasser, gas-phase silica and filler, and the parts by weight of described each component are:
The brominated bisphenol a type epoxy resin of bromine content >=50% 100 parts,
Curing agent 20-40 part,
Pigment 10-50 part,
Anti-static agent 10-50 part,
Fire retardant 5-10 part,
Degasser 0.5-1.0 part,
Gas-phase silica 0.5-0.8 part,
Filler 0-50 part;
Described curing agent is phenolic resin or modified dicyandiamine, described anti-static agent is one or more mixtures in electrically conductive graphite, carbon black, metallic dust, doping stannic oxide and doping zinc-oxide, described fire retardant is one or more mixtures in antimonous oxide, triphenyl phosphate, eight bromo ether and hexabromo-Cyclododecane, described degasser is styrax or Tissuemat E, and described filler is the one in barium sulphate, white clay, wollastonite.
2. make the method that modified epoxy Coated Steels as claimed in claim 1 moulds composite gas pipe, it is characterized in that comprising the following steps:
by each composition weight number of modified epoxy coating by modified epoxy, curing agent, pigment, anti-static agent, fire retardant, degasser, gas-phase silica and filler after mixed at high speed, gained homogeneous mixture is added in single screw extrusion machine or double screw extruder and extrudes; Extrusion press machine cavity temperature is 70-85 DEG C, and extruder head temperature is 95 DEG C; Extrudate is obtained by compressing tablet, cooling, pulverizing, screening the powder coating that particle diameter is 35-55um;
by the steel pipe after surperficial scale removal through washing 1-3min, then the chlorohydric acid pickling 15-25min of 70% is used, wash 1-3min again, then carry out table and adjust 2-3min, table adjusts pH to be 8-9, and then carry out phosphorating treatment 15-30min, Phosphating Solution pH is 2.5, carry out washing 1-3min post-passivation 1min sector-style of going forward side by side again to do, now form the phosphating coat of one deck 2-3um charcoal or black gray expandable in steel tube surface;
lift to electrostatic spraying apparatus after air-dry for the steel pipe after acid washing phosphorization, inside and outside spraying is carried out to steel pipe;
steel pipe after electrostatic spraying is sent into sintering furnace solidification, solidifying temperature is 170-200 DEG C, and the time is 30-45min, forms modified epoxy Coated Steels and moulds composite gas pipe.
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| CN104308475A (en) * | 2014-09-28 | 2015-01-28 | 山东联创管业有限公司 | Novel composite steel pipe manufacturing method for coal mine underground gas drainage |
| CN109439140B (en) * | 2018-10-31 | 2021-12-14 | 福州盛世凌云环保科技有限公司 | Ion implantation composite coating antibacterial stainless steel water pipe |
| CN110564268A (en) * | 2019-10-23 | 2019-12-13 | 山东信科粉末涂料有限公司 | Antistatic flame-retardant epoxy resin powder coating and preparation method thereof |
| CN112745734A (en) * | 2020-12-15 | 2021-05-04 | 宁波格林斯粉末涂装有限公司 | Open fire resistant barbecue powder coating |
| CN115157781A (en) * | 2022-08-02 | 2022-10-11 | 材通(乐昌)管业科技有限公司 | Environment-friendly flame-retardant high-toughness PVC insulating electrical sleeve |
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| CN101809055A (en) * | 2007-09-27 | 2010-08-18 | 株式会社日本触媒 | Curable resin composition for molded bodies, molded body, and production method thereof |
| CN102181191A (en) * | 2011-04-07 | 2011-09-14 | 安徽海程涂复科技有限公司 | Alloy antiseptic composite coating for coal mine underground gas pipe |
| CN203189892U (en) * | 2013-04-26 | 2013-09-11 | 青岛豪德博尔实业有限公司 | Petroleum transporting composite steel tube with polymer coating |
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