CN107216804A - A kind of preparation method of anticorrosive paint and its coating - Google Patents
A kind of preparation method of anticorrosive paint and its coating Download PDFInfo
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- CN107216804A CN107216804A CN201710486918.5A CN201710486918A CN107216804A CN 107216804 A CN107216804 A CN 107216804A CN 201710486918 A CN201710486918 A CN 201710486918A CN 107216804 A CN107216804 A CN 107216804A
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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
- C09D183/00—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Coating compositions based on derivatives of such polymers
- C09D183/04—Polysiloxanes
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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
- C09D5/08—Anti-corrosive paints
- C09D5/10—Anti-corrosive paints containing metal dust
-
- 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
- C09D5/08—Anti-corrosive paints
- C09D5/10—Anti-corrosive paints containing metal dust
- C09D5/103—Anti-corrosive paints containing metal dust containing Al
-
- 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
- C09D5/08—Anti-corrosive paints
- C09D5/10—Anti-corrosive paints containing metal dust
- C09D5/106—Anti-corrosive paints containing metal dust containing Zn
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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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
- F01N13/16—Selection of particular materials
-
- 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
- C08K2003/0812—Aluminium
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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
- C08K2003/2227—Oxides; Hydroxides of metals of aluminium
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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
- C08K2201/00—Specific properties of additives
- C08K2201/002—Physical properties
- C08K2201/003—Additives being defined by their diameter
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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
- C08K2201/00—Specific properties of additives
- C08K2201/014—Additives containing two or more different additives of the same subgroup in C08K
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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
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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
- C08K3/34—Silicon-containing compounds
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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
- C08K3/34—Silicon-containing compounds
- C08K3/346—Clay
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2510/00—Surface coverings
- F01N2510/08—Surface coverings for corrosion prevention
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Materials Engineering (AREA)
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Abstract
The invention discloses the preparation method of a kind of anticorrosive paint and its coating, it includes step：The preparation of base-material, filler slurry is finally mixed base-material with filler slurry, and the weight ratio of base-material and slurry is 1:1~1:4, stir and be configured to coating.The coating of the present invention can be constructed by techniques such as spraying, brushing, roller coat, and the part after construction realizes solidification in 150 DEG C~200 DEG C of temperature, then after more than 600 DEG C of high temperature secondary treatment, form complete dense non-porous gap coating.
Description
Technical field
The present invention relates to technical field of chemistry, and in particular to technical field of coatings, more particularly to a kind of to be used for engine row
The anticorrosive paint of gas system and its preparation method of coating.
Background technology
The gas extraction system of diesel oil or natural gas engine otherwise cracked ends are by high temperature to 800 DEG C and low temperature between subzero 40 DEG C
Temperature change.The front end of gas extraction system includes the parts such as exhaust manifold and exhaust pipe of booster, and generally spheroidal graphite cast-iron is made
It is standby.These irony parts are exposed under different temperature, environment, it is easy to by the corrosive gas in air, such as：
Chlorion, carbanion, NOx attack, and being easily oxidized corrosion causes to get rusty.Gas extraction system after corrosion, which can be reduced, to be made
With the life-span, the rusty stain on surface can also peel off the life-span extended influence to the miscellaneous part of engine.Cast iron member is replaced with spy
Kind high temperature stainless steel part be although an effective processing method, but can bring cost, service life, intensity etc. other
Problem, still without application on large-sized diesel motor.
The preservative treatment most straightforward approach of cast iron member is in engine components surface spraying anticorrosive paint.However, general
Logical anticorrosive paint is using organic polymer thing as main component, it is impossible to bear the baking of 300 DEG C of high temperature above for a long time.Pass
On system, contain the organic siliconresin of metallic aluminium powder as the main selection of high-temperature coatings, and be widely used for many years.It is Chinese special
Profit application CN102140308 discloses " a kind of new Heat Resistant Coating ", and it is resistance to using the organic siliconresin of aluminium powder as main filler
High-temperature coatings, the main component of this coating is methyl or phenyl organic siliconresin, and the addition of metallic aluminium powder is improved using temperature
Degree, shows fair below 500 DEG C of temperature, but at higher temperatures, thermal cracking, metallic aluminium easily occur for organic siliconresin
To occur oxidation reaction, this coating can not more than 600 DEG C at a high temperature of play prolonged antisepsis, it is impossible to meet
The anti-corrosion of engine exhaust system.Separately have a kind of heat-resisting more than 1000 DEG C inorganic high-temp coating (modern technologies ceramics, 2011,
Page 39), containing rare earth oxide, but its thermal coefficient of expansion is mismatched with engine material, it is impossible to bear cold and hot drastic change, nothing
Method is used in the anti-corrosion of the violent engine exhaust system of cold and hot change, cracking is very easy to during cold and hot drastic change de-
Fall.Some are with sodium metasilicate, and the inorganic material such as aluminium dihydrogen phosphate is other high-temperature resistant coatings of main body, because coating is not fine and close, is contained
There is hole, it is impossible to prevent corrosive gas or Liquid Penetrant, can not still be used in the gas extraction system anti-corrosion of engine.Ward off glass
Glass technology is as a traditional aseptic technic, based on vitreous material, and the painting of densification can be formed in metallic surface
Layer, resistance to certain temperature, but its thermal-shock resistance is very poor, is also not used to need the engine exhaust of cold cycling repeatedly
System.
With the continuous improvement of energy-saving and emission-reduction requirement, the operating temperature more and more higher of the engine such as natural gas or diesel oil,
There must be high-temperature coatings that are adaptable, being used in 800 DEG C of long-times to obtain developing outstanding to solve engine exhaust system
It is the high-temperature anticorrosion problem of front end.
The content of the invention
In view of the deficienciess of the prior art, a kind of heat resisting temperature of present invention offer is higher, can be when 800 DEG C of temperature be long
Between use, and cold-hot temperature become, the corrosion-resistant high-temperature resistant coating available for engine exhaust system.The coating is coated in row
After on gas manifold or booster, thickness is normally no more than 100 microns, engine once starting, in the temperature by 600 DEG C
Afterwards, a fine and close void-free coating can be formed, it is amenable to repetitious thermal cycle, do not shell peeling.
To reach above-mentioned purpose, first aspect present invention, which provides technical scheme, is：A kind of preparation method of anticorrosive paint, its
Comprise the following steps：
(1) preparation of base-material：Acidic silicasol of the solid content more than 30% is carried out at room temperature with silane coupler
The weight ratio of hydrolysis, Ludox and silane coupler is 1:1~3:1；
(2) preparation of filler slurry：Filler material is carried out to ball milling in a solvent into molecule, the solid content of slurry is
40%~70%；
(3) base-material of step (1) is mixed with the filler slurry of step (2), the weight ratio of base-material and slurry is 1:1
~1:4, stir and be configured to coating.
An optimal technical scheme of the invention, the base-material includes the acidic silicasol and 0~30 weight of 10~50 parts by weight
The Alumina gel of part；The sour species being wherein acidified is selected from hydrochloric acid, sulfuric acid.
An optimal technical scheme of the invention, the filler is selected from quartz sand, aluminum oxide, carborundum, talcum powder, kaolin
Powder, inorganic pigment, at least one of mullite powder and mica powder.
An optimal technical scheme of the invention, the silane coupler is selected from tetramethoxy-silicane, tetraethoxysilane, methyl
Trimethoxy silane, MTES, dimethyldimethoxysil,ne, dimethyldiethoxysilane, ethyl front three
At least one of TMOS, ethyl triethoxysilane and γ-(2,3- the third oxygen of epoxy) propyl trimethoxy silicane；It is excellent
Selection of land, the silane coupler is selected from tetramethoxy-silicane, tetraethoxysilane, MTMS, the ethoxy of methyl three
Base silane.
In an optimal technical scheme of the invention, by weight ratio meter, step (2), 0~50 is additionally added in the filler
The noncorroding metal powder of part, the noncorroding metal powder is in Al powder, Ti powder, Ni powder, Cr powder, Zn powder or stainless steel powder
Combination more than at least one or two.
In an optimal technical scheme of the invention, step (2), filler material is milled to D50 for 1 μm~20 μm.
It is preferred that, the solvent of the coating is selected from least one of water, methanol, ethanol or isopropanol or two or more
Combination.
It is preferred that, the pH value of the coating is 3~8.
It is preferred that, the solid content of the coating is 30%~80%, and content liquid is 20-70%.
It is preferred that, the coating also includes the high-temperature resisting pigment of 0~30 parts by weight, and the high-temperature resisting pigment is selected from copper chromium
Black, ferrimanganic is black and at least one of titanium dioxide.
It is preferred that, 5~30 parts by weight of glass powder are also contained in the filler, preferably described glass dust is low temperature glass
Powder, it is therefore preferable to borate glass powder, phosphate glass powder or silicate glass powder of the Tg below 400 DEG C, and these glass
Be free of Pb in powder, Cd, the heavy metal such as Hg.
Second aspect of the present invention provides technical scheme：A kind of preparation method of anti-corrosion coating, it includes following step
Suddenly：
A. coating is coated on cast iron member surface, then carries out baking and curing between 150 DEG C~200 DEG C；
B. the coating after solidification is formed into fine and close apply again after the secondary high-temperature heat treatment between 600 DEG C~800 DEG C
Layer.
In an optimal technical scheme of the invention, step A, coating is sprayed or brushed or the mode of roller coat is constructed in cast iron
Parts surface.
An optimal technical scheme of the invention, the thickness of the coating after solidification is between 30~80 microns.
Third aspect present invention provides technical scheme：A kind of anticorrosive paint, it is prepared via a method which to obtain：
(1) preparation of base-material：Acidic silicasol of the solid content more than 30% is carried out at room temperature with silane coupler
The weight ratio of hydrolysis, Ludox and silane coupler is 1:1~3:1；
(2) preparation of filler slurry：Filler material is carried out to ball milling in a solvent into molecule, the solid content of slurry is
40%~70%；
(3) base-material of step (1) is mixed with the filler slurry of step (2), the weight ratio of base-material and slurry is 1:1
~1:4, stir and be configured to coating.
The fourth aspect of the present invention provides a kind of a kind of above-mentioned purposes of the anticorrosive paint prepared, for engine row
The coating of gas system cast(ing) surface.
For the preparation method of the anticorrosive paint of engine exhaust system, it comprises the following steps：
(1) preparation of base-material：Acidic silicasol of the solid content more than 30% is carried out at room temperature with silane coupler
Hydrolysis, the time of reaction is less than 24 hours more than 6 hours, and the weight ratio of Ludox and silane coupler is 1:1~3:
1；
(2) preparation of filler slurry：Filler material is carried out in a solvent be milled to mean particle size to 20 microns with
Lower more than 1 micron, the solid content of slurry is 40%~70%；
(3) the filler slurry of the base-material of step (1) step (2) good with ball milling is mixed, base-material and slurry it is mixed
It is 1 to close mass ratio:1~1:4, it is configured to coating.
The present invention solves defect present in background technology, has the advantages that：
1. in the raw material of high-temperature resistant coating of the present invention, with Ludox (or complex sol of Ludox and Alumina gel) and silane
The reactant of coupling agent is as base-material, compared to traditional organosilicon coating containing aluminium, is resistant to higher temperature to more than 800 degree；
The ceramic material using metal oxide as main component is used, then is avoided that high-temperature oxydation, heat endurance is improved and anticorrosive
Property, be conducive to the good appearance for keeping forming coating；Using cryogenic glass powder, its chemical property is stable, not only contributes to carry
The overall acid resistance of high coating, fusing also helps the bonding force between SiO2 in enhancing base-material during high temperature, coating is caused completely
It is close, it is amenable to higher temperature.The various raw materials of the coating are matched in proper proportions, and synergy causes the present invention to apply
Expect compact structure, use that can be in the long period in more than 600 DEG C high temperature can be subjected to 800 DEG C of high temperature above prolonged
Baking, with high/low temperature salt spray resistance, the anti-corrosive properties such as acidproof, and its thermal coefficient of expansion matches with engine material, temperature-change resistance
It is good, cold and hot drastic change repeatedly between 800 DEG C of high temperature and room temperature or low temperature can be born, is especially suitable for the anti-of engine
It is rotten.
2. in the raw material of high-temperature resistant coating of the present invention, can also include noncorroding metal powder, it is conducive to improving adhesive force
With anticorrosion resistance to elevated temperatures, Al, Ti, Ni, Cr, Zn are different with the fusing point of stainless steel, and the coating containing metal-powder more can be with
Used as priming paint, active metal such as Zn can be made, electrochemical anti-corrosive is realized, while meeting coating in the direct contacting metal bottoms of Al
More than 800 DEG C of high temperature resistant, corrosion-resistant needs.
3. the cryogenic glass powder in high-temperature resistant coating of the present invention, its raw material selects borate, phosphate or silicate etc. are low
Warm glass, such as bismuth oxide silicate, without Pb, Cd, Hg and sexavalence Cr, ensure coating high temperature resistant, decay resistance it is same
When will not introduce associated toxic ion again, be conducive to environmental protection.The solvent of coating can be only water, can also based on water, relative to
System based on organic solvent is also advantageously in health and environmental protection.
Embodiment
In order to facilitate the understanding of the purposes, features and advantages of the present invention, specific reality below to the present invention
The mode of applying is described in detail.Many details are elaborated in the following description to fully understand the present invention.But
The invention can be embodied in many other ways as described herein, and those skilled in the art can be without prejudice to originally
Similar improvement is done in the case of invention intension, therefore the present invention is not limited by following public specific embodiment.
Unless otherwise defined, all of technologies and scientific terms used here by the article is with belonging to technical field of the invention
The implication that technical staff is generally understood that is identical.Term used in the description of the invention herein is intended merely to description
The purpose of specific embodiment, it is not intended that in the limitation present invention.Term as used herein " and/or " include one or many
The arbitrary and all combination of individual related Listed Items.
In one embodiment of the invention, a kind of high-temperature resistant coating for engine exhaust system, by following raw materials through substep
Mix.The raw material, by weight ratio meter, include 10~80 parts of base-material, 10~80 parts of ceramic material, and 5~
30 parts of cryogenic glass powder；The base-material includes 10~50 parts of Ludox (and 0~30 part of Alumina gel)；The ceramic material
Material includes at least one of quartz sand, aluminum oxide, carborundum, talcum powder, kaolin powder, mullite powder, and mica powder.This
It is anti-with silane coupler with Ludox (or mixed sols of Ludox and Alumina gel) in the raw material of invention high-temperature resistant coating
Answer thing as base-material, compared to organosilicon coating, heat-resisting quantity is more preferable；Use the ceramics using metal oxide as main component
Material, then be avoided that high-temperature oxydation, improves heat endurance and corrosion resistance, is conducive to the good appearance for keeping forming coating；
Using cryogenic glass powder, its chemical property is stable, not only contributes to improve the overall acid resistance of coating, fusing also has during high temperature
Beneficial to the bonding force between SiO2 in enhancing base-material, make the coating to be formed completely fine and close.It is preferred that, the solid content of the Ludox
For 25~35%, the solid content of Alumina gel is 15~5%.Further, the solvent in the Ludox and Alumina gel is respectively
Water.It is preferred that, ratio meter by weight, the ceramic material includes 0~40 part of quartz sand, 0~30 part of aluminum oxide, carborundum 0
~30 parts, 0~25 part of talcum powder, 0~20 part of kaolin powder, 0~20 part of mullite powder, 0~20 part of mica powder.The coating
Various raw materials match in proper proportions, synergy causes coating of the present invention when can be longer in more than 600 DEG C high temperature
Between use, and its thermal coefficient of expansion matches with engine material, and temperature-change resistance is good, is suitable for the anti-corrosion of engine.
The solvent of coating can be only water, can also include water and organic solvent methanol, ethanol and isopropyl based on water
At least one of alcohol, relative to the system based on organic solvent also advantageously in health and environmental protection.Water in solvent comes
Ludox or Alumina gel are come from, can also be individually added into.
Ratio meter by weight, the raw material also includes 0~50 part of noncorroding metal powder, and the noncorroding metal powder is
Metal Al powder, Ti powder, Ni powder, Cr powder, at least one of Zn powder and stainless steel powder.Further, the noncorroding metal powder
Including 0~20 part of metal Al powder, 0~20 part of Ti powder, 0 part of Ni powder, 0~20 part of 20%, Cr powder, 0~50 part of Zn powder, stainless steel powder
0~20 part.It is conducive to improving adhesive force and anticorrosion resistance to elevated temperatures, and making the thermal conductivity of coating is improved, and structure is more
It is fine and close.The fusing point of Al, Ti, Ni, Cr, Zn and stainless steel is different, and coating can be made to form fused coating at different temperatures, meets
The high temperature resistant that more than 800 DEG C of coating, corrosion-resistant needs.
Ratio meter by weight, the raw material also includes 0~30 part of high-temperature resisting pigment.Further, the high temperature resistant
Pigment includes 0~10 part of titanium dioxide, 0~30 part of copper-chrome black powder, 0~30 part of the black powder of ferrimanganic.
Ratio meter by weight, the raw material also includes 0~10 part of gas-phase silica, existing excellent heat endurance, again
Reinforcement, thickening, thixotroping, insulation, delustring and anti-settling effect are played in coating.
The preparation method of above-mentioned high-temperature resistant coating.
The first step：With silane coupler hydrolysis occurs for the Ludox (or sial complex sol) in base-material, forms high
Molecular network structure.Water required for reaction system pH3~7, hydrolysis comes from Ludox or Alumina gel, can also be independent
Add.Organic solvent can be used as auxiliary agent, such as methanol, ethanol, isopropanol, one kind in butanol and propylene glycol monomethyl ether or
It is several, aid in the hydrolysis of silane coupler.I.e. solvent is the mixing of water or water and organic solvent, and the consumption of solvent is should
The 10%~50% of gross weight before hydrolyzation system reaction；Acetic acid is it is also possible to use, sulfuric acid, hydrochloric acid or nitric acid are used as hydrolysis
Catalyst, catalyst amount is 0.1%~5% of gross weight before hydrolyzation system reacts.The temperature control of hydrolysis 0~
Between 100 DEG C, the reaction time is 1~24h, is specifically adjusted with the height of reaction temperature.
Second step：The preparation of the slurry of filler：By ceramic powder material, cryogenic glass powder is used as filler.Add anticorrosive
Metal powder, high-temperature resisting pigment, and gas-phase silica, are mixed to get the high-temperature resistant coating of the present invention.Crushed and made pottery with ultra-fine ball mill
Porcelain powder body material, the mean particle size to ceramic particle is below 10 μm.
3rd step, base-material is mixed with the slurry of filler, with vinegar acid for adjusting pH to 4~6.Reaction product is cooled to room
Temperature, then filters 200 mesh gauzes, excludes the debris such as large granule, obtains high-temperature resistant coating of the present invention.
Embodiment 1：
The first step：Neutral Ludox (Suzhou Nano Dispersions Co., Ltd., ND-0201) and first by solid content 30%
Base trimethoxy silane 1:1 is hydrolyzed reaction at room temperature, adds vinegar acid for adjusting pH to 4, the time of reaction is 6 hours,
It is used as base-material.
Second step：Ceramic powder material is crushed with ultra-fine ball mill, to ceramics of the particle mean size D50 at 4 μm or so
Slurry.Solvent is isopropanol, and powder is 1000 mesh quartz sands, alpha-alumina powder, talcum powder, copper-chrome black powder, proportionally
1:1:0.5:1 carries out ball milling, and total solids content is 60%, is used as the filler of ceramic coating.
3rd step：By 1:1 ratio puts into the slurry of filler in base-material, mix products is cooled into room temperature, then mistake
200 mesh gauzes are filtered, the debris such as large granule is excluded, obtains high-temperature resistant coating.
Using the present invention high-temperature resistant coating when, it is necessary to first by the exhaust manifold of engine or the cast iron member of booster
Shot Blasting is carried out, blasting treatment is further carried out, thoroughly any greasy dirt in removing surface, the foreign matter such as iron rust, then with height
Pressure air is cleaned.Engine components after processing are subjected to application coating of the present invention with the mode without gas high pressure painting,
Can be by the way of with brushing and roller coating.Part after application sends into 150-200 DEG C of continuous tunnel furnace solidification, shaping.After spraying
Coating dry thickness control of the present invention is below 100 μm, it is preferred that 60-80 μm.
The cast iron member of material same with the exhaust pipe of engine is cut, blasting treatment, then by each reality of the invention
The high-temperature resistant coating for applying example is sprayed on part respectively, and prepares paint film respectively according to GB1727-92 methods, the portion after japanning
Part is heat-treated in 800 DEG C of air, and the detection of following indices is then carried out to each part after spraying baking, is surveyed
Method for testing and result are as follows：
As seen from the above table, the various coating of the embodiment of the present invention are satisfied by table every test request, reach criterion of acceptability,
More than 800 DEG C prolonged bakings can be subjected to, 800 DEG C of cold and hot drastic change repeatedly between room temperature can be born, structure is caused
It is close, with salt spray resistance, the anti-corrosive properties such as acidproof, mechanical shock, operation with certain hardness to be subjected in installation
In vibrations.
General principle, principal character and the advantages of the present invention of the present invention has been shown and described above.The technology of the industry
Personnel are not it should be appreciated that the present invention is limited by examples detailed above, and the simply explanation described in examples detailed above and specification is of the invention
Principle, various changes and modifications of the present invention are possible without departing from the spirit and scope of the present invention, these change and
Improvement all fall within the protetion scope of the claimed invention.The claimed scope of the invention is by appended claims and its waits
Jljl is defined.
Claims (10)
1. a kind of preparation method of anticorrosive paint, it comprises the following steps：
(1) preparation of base-material：Acidic silicasol of the solid content more than 30% is hydrolyzed at room temperature with silane coupler
The weight ratio of reaction, Ludox and silane coupler is 1:1~3:1；
(2) preparation of filler slurry：Filler material is carried out to ball milling in a solvent into molecule, the solid content of slurry is 40%
~70%；
(3) base-material of step (1) is mixed with the filler slurry of step (2), the weight ratio of base-material and slurry is 1:1~1:
4, stir and be configured to coating.
2. preparation method according to claim 1, it is characterised in that the base-material includes the acid silicon of 10~50 parts by weight
The Alumina gel of colloidal sol and 0~30 parts by weight.
3. preparation method according to claim 1, it is characterised in that the filler is selected from quartz sand, aluminum oxide, carbonization
Silicon, talcum powder, glass dust, kaolin powder, inorganic pigment, at least one of mullite powder and mica powder.
4. preparation method according to claim 1, it is characterised in that the silane coupler is selected from tetramethoxy-silicane,
Tetraethoxysilane, MTMS, MTES, dimethyldimethoxysil,ne, dimethyl diethyl
TMOS, ethyl trimethoxy silane, ethyl triethoxysilane and γ-(2,3- the third oxygen of epoxy) propyl trimethoxy silicon
At least one of alkane.
5. preparation method according to claim 1, it is characterised in that in step (2), it is 1 that filler material is milled into D50
μm~20 μm.
6. a kind of coating production of anticorrosive paint as described in Claims 1 to 5, it comprises the following steps：
A. coating is coated on cast iron member surface, then carries out baking and curing between 150 DEG C~200 DEG C；
B. by the coating after solidification again by between 600 DEG C~800 DEG C secondary high-temperature heat treatment after, formed dense coating.
7. preparation method according to claim 1, it is characterised in that in step A, coating is sprayed or brushed or roller coat
Mode construct in cast iron member surface.
8. preparation method according to claim 1, it is characterised in that the thickness of the coating after solidification 30~80 microns it
Between.
9. a kind of anticorrosive paint, it is prepared via a method which to obtain：
(1) preparation of base-material：Acidic silicasol of the solid content more than 30% is hydrolyzed at room temperature with silane coupler
The weight ratio of reaction, Ludox and silane coupler is 1:1~3:1；
(2) preparation of filler slurry：Filler material is carried out to ball milling in a solvent into molecule, the solid content of slurry is 40%
~70%；
(3) base-material of step (1) is mixed with the filler slurry of step (2), the weight ratio of base-material and slurry is 1:1~1:
4, stir and be configured to coating.
10. the purposes for the anticorrosive paint that a kind of preparation method as described in Claims 1 to 5 is obtained, for engine exhaust system
The coating of cast(ing) surface.
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| CN108441116A (en) * | 2018-04-20 | 2018-08-24 | 同光（江苏）新材料科技有限公司 | A kind of preparation method of fire resistant water-thinned nanometer paint |
| CN110318038A (en) * | 2019-06-19 | 2019-10-11 | 江苏华恒新能源有限公司 | A method of for accessory separation deposition membrane layer in vacuum coating cavity |
| CN112048203A (en) * | 2020-09-16 | 2020-12-08 | 天津达盈材料科技有限公司 | Water-based high-temperature-resistant flexible ceramic coating material and preparation and use methods thereof |
| CN112280040A (en) * | 2020-11-05 | 2021-01-29 | 重庆艾普防腐技术有限公司 | Novel green environment-friendly high-corrosion-resistance zinc-aluminum coating |
| CN116804131A (en) * | 2023-06-26 | 2023-09-26 | 深圳前海石墨烯产业有限公司 | High-heat-conductivity aluminum matrix inorganic ceramic coating and preparation method and application thereof |
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| CN105566956A (en) * | 2016-03-03 | 2016-05-11 | 东莞市润天化工有限公司 | High-abrasion-resistance, high-temperature-resistant and water-cooking-resistant aqueous ceramic paint |
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| CN102061126A (en) * | 2010-11-25 | 2011-05-18 | 上海金力泰化工股份有限公司 | Ceramic coating film composite and preparation method thereof |
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| CN108441116A (en) * | 2018-04-20 | 2018-08-24 | 同光（江苏）新材料科技有限公司 | A kind of preparation method of fire resistant water-thinned nanometer paint |
| CN110318038A (en) * | 2019-06-19 | 2019-10-11 | 江苏华恒新能源有限公司 | A method of for accessory separation deposition membrane layer in vacuum coating cavity |
| CN112048203A (en) * | 2020-09-16 | 2020-12-08 | 天津达盈材料科技有限公司 | Water-based high-temperature-resistant flexible ceramic coating material and preparation and use methods thereof |
| CN112280040A (en) * | 2020-11-05 | 2021-01-29 | 重庆艾普防腐技术有限公司 | Novel green environment-friendly high-corrosion-resistance zinc-aluminum coating |
| CN116804131A (en) * | 2023-06-26 | 2023-09-26 | 深圳前海石墨烯产业有限公司 | High-heat-conductivity aluminum matrix inorganic ceramic coating and preparation method and application thereof |
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