CN110359073A - A kind of aluminium alloy anode oxide film hole sealing agent and its application method - Google Patents
A kind of aluminium alloy anode oxide film hole sealing agent and its application method Download PDFInfo
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- CN110359073A CN110359073A CN201910606801.5A CN201910606801A CN110359073A CN 110359073 A CN110359073 A CN 110359073A CN 201910606801 A CN201910606801 A CN 201910606801A CN 110359073 A CN110359073 A CN 110359073A
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- aluminium alloy
- oxide film
- sealing agent
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- hole sealing
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
- C25D11/02—Anodisation
- C25D11/04—Anodisation of aluminium or alloys based thereon
- C25D11/18—After-treatment, e.g. pore-sealing
- C25D11/24—Chemical after-treatment
- C25D11/246—Chemical after-treatment for sealing layers
Abstract
The invention discloses a kind of aluminium alloy anode oxide film hole sealing agent and its application methods, belong to Process on Aluminum Alloy Oxidation Film hole sealing agent technical field.The present invention passes through multiple emulsion to filtering layer surface quick film-forming first, it is protected, secondly the metal salt being added can be very good to penetrate into hole, it is combined with aluminium ion therein, form complex compound, and the absorption property for passing through multiple emulsion, it can be very good the complex compound that will be formed, it is combined with inside substrate, and be added with methyltrimethoxysilane, auxiliary material based on vinyltriethoxysilane, the multiple emulsion of formation can be modified, on the one hand increase heat resistance, on the other hand the water resistance of polymer in multiple emulsion is improved, and the binding performance with substrate, enhance sealing of hole effect, to solve in current hole sealing agent containing metal ions such as nickel, easily cause the pollution to environment, and the problem of sealing of hole effect difference.
Description
Technical field
The present invention relates to Process on Aluminum Alloy Oxidation Film hole sealing agent technical fields, and in particular to a kind of aluminium alloy anode oxide film sealing of hole
Agent and its application method.
Background technique
Aluminium element is that most wide one of element is distributed in nature.Fine aluminium quality is soft, density is small, ductility is good, plasticity is high,
It can carry out various machinings and have good electric conductivity and thermal conductivity, electric conductivity is only second to, and purposes is very extensive.Due to
The intensity of fine aluminium is low, could only be made as structural material by by its alloying, obtaining the aluminium alloy that density is small, intensity is high
With.Aluminum alloy materials have a series of excellent physics, chemistry, mechanics and processing performance, can satisfy from kitchen meal apparatus to point
End science and technology is drilled industry to a variety of requirements of all trades and professions such as transportation and aerospace from building dress, is passed through in its people
It is used widely in the every field of Ji.
Aluminium is the active substance of chemical property, and surface will form one layer of oxide thin layer film in air, this layer of oxidation film exists
There is good corrosion resistance in dry atmosphere, but in the atmosphere of pollution and water, seawater, soil and various corrosive mediums, does not then have
Enough protective values.Therefore, aluminium and aluminum alloy surface require to be surface-treated in many cases, and anodic oxidation is that aluminium closes
The most common surface treatment means of gold.This method is that aluminium alloy is immersed in the oxidation such as acidic electrolysis bath such as sulfuric acid, oxalic acid, phosphoric acid
Pass to certain additional positive current in liquid, aluminum alloy surface can be formed one layer with amorphous alumina be mainly form, thickness
Up to tens microns of hard coating.Anode oxide film have double-layer structure, internal layer is thin and compact, claim barrier layer, outer layer be compared with
Thick porous layer, this porous layer have excellent adsorption capacity, often as the bottom of aluminium coloring or the mistake of outer overcoat layer
Cross layer, but anti-corrosion capability, weatherability, stain resistance, etc. cannot all reach requirement, therefore consider from practical application, aluminium sun
The micropore of pole oxidation film must be closed.The anode oxide film of non-sealing of hole makes to be exposed to due to the area in a large amount of micropore holes
The effective surface area of workpiece or sample in environment increases by tens times and arrives hundreds of times, and corresponding corrosion rate also greatly increases thus
Add.Therefore anodizing of aluminium film is in addition to individual such as abrasion-resistive hard oxidation films, from corrosion resistance and stain resistance consideration is improved, all
It must carry out sealing pores.
Industrial relatively common common sealing of hole operating method has 4 kinds: high temperature hole sealing, cold seal hole, medium temperature sealing of hole, organic matter
Sealing of hole.
High temperature hole sealing, high temperature hole sealing are called boiling water sealing hole, are anti-by the hydration of the oxidation film (AL2O3) on aluminum products surface
Vigorous nurse body, vigorous nurse body good corrosion resistance should be generated, and the expansion of oxidation film molecular volume seals oxide-film micropore when hydration reaction
It closes.
Cold seal hole, cold seal hole do not need to heat, and can operate at room temperature, so being called room temperature sealing of hole.Cold seal hole one
As use nickel fluoride, rely primarily on the nickel ion of positive divalent and the fluorine ion of negative one valence.
Medium temperature sealing of hole, medium temperature sealing of hole refer to a kind of temperature of the sealing of hole sealing of hole between the two in high temperature hole sealing and cold seal hole
Technology, main hole sealing agent are nickel acetate, and stability is good, is easy to control.4, organic matter sealing of hole coats one layer on aluminium material oxidation film
Organic polymer coating.
At present in aluminum alloy anode oxidative work-up technique, in order to reduce the voidage and adsorption capacity of anode oxide film,
It is a large amount of using low temperature pore sealing agent mild in containing, the hole sealing agent sealing of hole is fast, easy to operate, dyestuff when sealing of hole can be effectively prevented
It leaches, impurity permission is big, and sealing of hole weightlessness is minimum, and properties of product and appearance are attained by requirement.Contain nickel in hole sealing agent at present
Equal metal ions, easily cause the pollution to environment, and sealing of hole effect is poor, and the gadget of nickeliferous metal connects with human skin for a long time
Touching, can dissociate Ni2+ out under the effect of human body sweat stain, disturb skin and itch, induce Allergic contact dermatitis, be prohibited from using, and go out
The relevant limitation standard of platform, thus exploitation can volume production without nickel hole-sealing technology become the task of top priority.
Summary of the invention
The technical problems to be solved by the invention: it for the metal ions such as nickel are contained in current hole sealing agent, easily causes to ring
The pollution in border, and the problem of sealing of hole effect difference, the present invention provides a kind of aluminium alloy anode oxide film hole sealing agent and its application sides
Method.
In order to solve the above technical problems, the present invention is using technical solution as described below:
A kind of aluminium alloy anode oxide film hole sealing agent, according to parts by weight, including 13~16 parts of surfactants, 30~35 parts of gold
Belong to salt, 20~26 multiple emulsions, 10~15 parts of auxiliary materials.
The surfactant is fatty alcohol polyoxyethylene ether, any one in isomerous tridecanol ether phosphate.
The metal salt is ferrous citrate, magnesium acetate 4:4~8 in mass ratio mix.
The multiple emulsion the preparation method comprises the following steps:
(1) according to parts by weight, 120~130 parts of water, 40~50 parts of mix monomers, 20~25 parts of auxiliary agents, 13~15 parts of auxiliary are taken
Water, mix monomer, auxiliary agent and initiator, are put into reaction kettle by agent, 4~6 parts of initiators first, adjust pH to 8.5~9.5,
Nitrogen protection stirs evenly；
(2) 80~85 DEG C after mixing evenly, are being warming up to, be stirred to react, adjuvant is added, it is cooling, it stands, discharging is collected out
Material, rotary evaporation go to remove water, and collect residue, residue is mixed with ethanol solution 4:5~7 in mass ratio to get
Multiple emulsion.
The mix monomer is acrylamide, sodium acrylate 7:2~5 in mass ratio mix.
The auxiliary agent is sodium carbonate, zinc acetate 4:2~4 in mass ratio mix.
The adjuvant is citric acid, hydrolysis of polymaleic anhydride 9~12:2 in mass ratio is mixed.
The initiator is potassium peroxydisulfate, any one in ammonium persulfate.
The auxiliary material is methyltrimethoxysilane, vinyltriethoxysilane 6~9:5 in mass ratio~8 mixing
It forms.
A kind of application method of aluminium alloy anode oxide film hole sealing agent, the application method include the following steps:
A. raw material is taken in parts by weight, is first stirred surfactant, metal salt, multiple emulsion at 80~85 DEG C mixed
It closes, the water and auxiliary material for adding multiple emulsion volume 40~60% are mixed, and aluminium alloy anode oxide film hole sealing agent is obtained；
B. aluminium alloy part is washed, air-dries, is put into aluminium alloy anode oxide film hole sealing agent and is impregnated, soaking temperature is
85~95 DEG C, the time is 20~40min, is taken out, drying, i.e. completion sealing of hole.
The present invention is compared with other methods, and advantageous effects are:
The present invention by carrying out initiation polymerization by the effect of initiator using acrylamide, sodium acrylate as mix monomer, then
It is mixed with citric acid, hydrolysis of polymaleic anhydride, hydrolysis of polymaleic anhydride and polymer are combined, enhancing is inhaled
Attached adhesive effect in use first protects filtering layer surface quick film-forming by multiple emulsion, is secondly added
Metal salt can be very good to penetrate into hole, be combined with aluminium ion therein, form complex compound, and pass through Composite Milk
The absorption property of liquid can be very good the complex compound that will be formed, and be combined inside substrate, and be added with methyl trimethoxy
Auxiliary material based on oxysilane, vinyltriethoxysilane can be modified the multiple emulsion of formation, on the one hand
Increase heat resistance, on the other hand improves the water resistance of polymer in multiple emulsion, and the binding performance with substrate, enhancing envelope
Hole effect easily causes the pollution to environment, and sealing of hole effect is poor to solve in current hole sealing agent containing metal ions such as nickel
The problem of.
Specific embodiment
Surfactant is fatty alcohol polyoxyethylene ether, any one in isomerous tridecanol ether phosphate.
Metal salt is ferrous citrate, magnesium acetate 4:4~8 in mass ratio mix.
Multiple emulsion the preparation method comprises the following steps:
(1) according to parts by weight, 120~130 parts of water, 40~50 parts of mix monomers, 20~25 parts of auxiliary agents, 13~15 parts of auxiliary are taken
Water, mix monomer, auxiliary agent and initiator, are put into reaction kettle by agent, 4~6 parts of initiators first, adjust pH to 8.5~9.5,
Nitrogen protection stirs evenly；
(2) 80~85 DEG C after mixing evenly, are being warming up to, are being stirred to react 4~6h, adjuvant is added, is cooled to room temperature, stood
8h, discharging, collects out material, and rotary evaporation goes to remove water, and collects residue, and residue and 1.3mol/L ethanol solution are pressed quality
It is mixed than 4:5~7 to get multiple emulsion.
Mix monomer is acrylamide, sodium acrylate 7:2~5 in mass ratio mix.
Auxiliary agent is sodium carbonate, zinc acetate 4:2~4 in mass ratio mix.
Adjuvant is citric acid, hydrolysis of polymaleic anhydride 9~12:2 in mass ratio is mixed.
Initiator is potassium peroxydisulfate, any one in ammonium persulfate.
Auxiliary material is methyltrimethoxysilane, vinyltriethoxysilane 6~9:5~8 in mass ratio mix.
A kind of aluminium alloy anode oxide film hole sealing agent, according to parts by weight, including 13~16 parts of surfactants, 30~35
Part metal salt, 20~26 multiple emulsions, 10~15 parts of auxiliary materials.
A kind of application method of aluminium alloy anode oxide film hole sealing agent, the application method include the following steps:
A. raw material is taken in parts by weight, is first stirred surfactant, metal salt, multiple emulsion at 80~85 DEG C mixed
It closes, the water and auxiliary material for adding multiple emulsion volume 40~60% are mixed, and aluminium alloy anode oxide film hole sealing agent is obtained；
B. aluminium alloy part is washed, washing temperature is 60~65 DEG C, air-dries, is put into aluminium alloy anode oxide film hole sealing agent
It is impregnated, soaking temperature is 85~95 DEG C, and the time is 20~40min, is taken out, drying, i.e. completion sealing of hole.
Embodiment 1
Surfactant is fatty alcohol polyoxyethylene ether.
Metal salt is ferrous citrate, magnesium acetate 4:4 in mass ratio is mixed.
Multiple emulsion the preparation method comprises the following steps:
(1) according to parts by weight, 120 parts of water, 40 parts of mix monomers, 20 parts of auxiliary agents, 13 parts of adjuvants, 4 parts of initiators are taken, first
Water, mix monomer, auxiliary agent and initiator are put into reaction kettle, pH to 8.5 is adjusted, nitrogen protection stirs evenly；
(2) 80 DEG C after mixing evenly, are being warming up to, are being stirred to react 4h, adjuvant is added, is cooled to room temperature, standing 8h, discharged,
Collect out material, rotary evaporation goes to remove water, collect residue, by residue and 1.3mol/L ethanol solution 4:5 in mass ratio into
Row mixing is to get multiple emulsion.
Mix monomer is acrylamide, sodium acrylate 7:2 in mass ratio is mixed.
Auxiliary agent is sodium carbonate, zinc acetate 4:2 in mass ratio is mixed.
Adjuvant is citric acid, hydrolysis of polymaleic anhydride 9:2 in mass ratio is mixed.
Initiator is potassium peroxydisulfate.
Auxiliary material is methyltrimethoxysilane, vinyltriethoxysilane 6:5 in mass ratio is mixed.
A kind of aluminium alloy anode oxide film hole sealing agent, according to parts by weight, including 13 parts of surfactants, 30 parts of metals
Salt, 20 multiple emulsions, 10 parts of auxiliary materials.
A kind of application method of aluminium alloy anode oxide film hole sealing agent, the application method include the following steps:
A. raw material is taken in parts by weight, and surfactant, metal salt, multiple emulsion are stirred mixing at 80 DEG C first, then
The water and auxiliary material that multiple emulsion volume 40% is added are mixed, and aluminium alloy anode oxide film hole sealing agent is obtained；
B. aluminium alloy part is washed, washing temperature is 60 DEG C, is air-dried, and the progress of aluminium alloy anode oxide film hole sealing agent is put into
It impregnates, soaking temperature is 85 DEG C, time 20min, is taken out, drying, i.e. completion sealing of hole.
Embodiment 2
Surfactant is isomerous tridecanol ether phosphate.
Metal salt is ferrous citrate, magnesium acetate 4:8 in mass ratio is mixed.
Multiple emulsion the preparation method comprises the following steps:
(1) according to parts by weight, 130 parts of water, 50 parts of mix monomers, 25 parts of auxiliary agents, 15 parts of adjuvants, 6 parts of initiators are taken, first
Water, mix monomer, auxiliary agent and initiator are put into reaction kettle, pH to 9.5 is adjusted, nitrogen protection stirs evenly；
(2) 85 DEG C after mixing evenly, are being warming up to, are being stirred to react 6h, adjuvant is added, is cooled to room temperature, standing 8h, discharged,
Collect out material, rotary evaporation goes to remove water, collect residue, by residue and 1.3mol/L ethanol solution 4:7 in mass ratio into
Row mixing is to get multiple emulsion.
Mix monomer is acrylamide, sodium acrylate 7:5 in mass ratio is mixed.
Auxiliary agent is sodium carbonate, zinc acetate 4:4 in mass ratio is mixed.
Adjuvant is citric acid, hydrolysis of polymaleic anhydride 12:2 in mass ratio is mixed.
Initiator is ammonium persulfate.
Auxiliary material is methyltrimethoxysilane, vinyltriethoxysilane 9:8 in mass ratio is mixed.
A kind of aluminium alloy anode oxide film hole sealing agent, according to parts by weight, including 16 parts of surfactants, 35 parts of metals
Salt, 26 multiple emulsions, 15 parts of auxiliary materials.
A kind of application method of aluminium alloy anode oxide film hole sealing agent, the application method include the following steps:
A. raw material is taken in parts by weight, and surfactant, metal salt, multiple emulsion are stirred mixing at 85 DEG C first, then
The water and auxiliary material that multiple emulsion volume 60% is added are mixed, and aluminium alloy anode oxide film hole sealing agent is obtained；
B. aluminium alloy part is washed, washing temperature is 65 DEG C, is air-dried, and the progress of aluminium alloy anode oxide film hole sealing agent is put into
It impregnates, soaking temperature is 95 DEG C, time 40min, is taken out, drying, i.e. completion sealing of hole.
Embodiment 3
Surfactant is fatty alcohol polyoxyethylene ether.
Metal salt is ferrous citrate, magnesium acetate 4:6 in mass ratio is mixed.
Multiple emulsion the preparation method comprises the following steps:
(1) according to parts by weight, 125 parts of water, 45 parts of mix monomers, 23 parts of auxiliary agents, 14 parts of adjuvants, 5 parts of initiators are taken, first
Water, mix monomer, auxiliary agent and initiator are put into reaction kettle, pH to 8.8 is adjusted, nitrogen protection stirs evenly；
(2) 83 DEG C after mixing evenly, are being warming up to, are being stirred to react 5h, adjuvant is added, is cooled to room temperature, standing 8h, discharged,
Collect out material, rotary evaporation goes to remove water, collect residue, by residue and 1.3mol/L ethanol solution 4:6 in mass ratio into
Row mixing is to get multiple emulsion.
Mix monomer is acrylamide, sodium acrylate 7:3 in mass ratio is mixed.
Auxiliary agent is sodium carbonate, zinc acetate 4:3 in mass ratio is mixed.
Adjuvant is citric acid, hydrolysis of polymaleic anhydride 10:2 in mass ratio is mixed.
Initiator is potassium peroxydisulfate.
Auxiliary material is methyltrimethoxysilane, vinyltriethoxysilane 7:6 in mass ratio is mixed.
A kind of aluminium alloy anode oxide film hole sealing agent, according to parts by weight, including 15 parts of surfactants, 32 parts of metals
Salt, 24 multiple emulsions, 13 parts of auxiliary materials.
A kind of application method of aluminium alloy anode oxide film hole sealing agent, the application method include the following steps:
A. raw material is taken in parts by weight, and surfactant, metal salt, multiple emulsion are stirred mixing at 83 DEG C first, then
The water and auxiliary material that multiple emulsion volume 50% is added are mixed, and aluminium alloy anode oxide film hole sealing agent is obtained；
B. aluminium alloy part is washed, washing temperature is 62 DEG C, is air-dried, and the progress of aluminium alloy anode oxide film hole sealing agent is put into
It impregnates, soaking temperature is 88 DEG C, time 30min, is taken out, drying, i.e. completion sealing of hole.
Comparative example 1: surfactant is fatty alcohol polyoxyethylene ether.
Metal salt is ferrous citrate, magnesium acetate 4:4 in mass ratio is mixed.
Mix monomer is acrylamide, sodium acrylate 7:2 in mass ratio is mixed.
Auxiliary agent is sodium carbonate, zinc acetate 4:2 in mass ratio is mixed.
Adjuvant is citric acid, hydrolysis of polymaleic anhydride 9:2 in mass ratio is mixed.
Initiator is potassium peroxydisulfate.
Auxiliary material is methyltrimethoxysilane, vinyltriethoxysilane 6:5 in mass ratio is mixed.
A kind of aluminium alloy anode oxide film hole sealing agent, according to parts by weight, including 13 parts of surfactants, 30 parts of metals
Salt, 20 multiple emulsions, 10 parts of auxiliary materials.
A kind of application method of aluminium alloy anode oxide film hole sealing agent, the application method include the following steps:
A. raw material is taken in parts by weight, and surfactant, metal salt, multiple emulsion are stirred mixing at 80 DEG C first, then
The water and auxiliary material that multiple emulsion volume 40% is added are mixed, and aluminium alloy anode oxide film hole sealing agent is obtained；
B. aluminium alloy part is washed, washing temperature is 60 DEG C, is air-dried, and the progress of aluminium alloy anode oxide film hole sealing agent is put into
It impregnates, soaking temperature is 85 DEG C, time 20min, is taken out, drying, i.e. completion sealing of hole.
Comparative example 2: commercially available aluminium alloy anode oxide film hole sealing agent.
The aluminium alloy anode oxide film hole sealing agent that above-described embodiment and comparative example obtain is used for workpiece, further according to GB/
T12967.3-2008: " aluminium and aluminium alloy anode oxide film detection method third portion: copper accelerated acetic acid salt spray test (CASS examination
Test) "；GB/T10125-2012: " artificial atmosphere corrosion test (salt spray test) "；GB5237.2-2008 detects the sealing of hole time；It is anti-
Hot crackability test: workpiece is first placed into 30s in acetone solvent, washes away greasy dirt, after air-drying, then is uprightly put into warmed-up a certain temperature
It spends in baking oven, toasts a hour, take out, whether method observation surface has crackle by visual observation, if visual method is not observed
Crackle then shows this if significant change is not observed on surface using the successional method of inspection of oxidation film (copper sulfate method)
Workpiece can be tested by the hot-cracking resistance of the temperature, obtain that the results are shown in Table 1.
Table 1:
| Project | Embodiment 1 | Embodiment 2 | Embodiment 3 | Comparative example 1 | Comparative example 2 |
| CASS/h | 72 | 70 | 71 | 68 | 56 |
| NSS/h | 883 | 882 | 880 | 804 | 672 |
| Hot-cracking resistance/DEG C | 105 | 103 | 101 | 95 | 80 |
| The sealing of hole time/min | 3 | 5 | 4 | 8 | 10 |
In summary, aluminium alloy anode oxide film hole sealing agent effect of the invention is more preferable as can be seen from Table 1, and being worthy to be popularized makes
With, the foregoing is merely preferred modes of the invention, are not intended to limit the invention, it is all the spirit and principles in the present invention it
Interior, any modification, equivalent replacement, improvement and so on should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of aluminium alloy anode oxide film hole sealing agent, according to parts by weight, including 13~16 parts of surfactants, feature exist
In further including 30~35 parts of metal salts, 20~26 multiple emulsions, 10~15 parts of auxiliary materials.
2. aluminium alloy anode oxide film hole sealing agent according to claim 1, which is characterized in that the surfactant is fat
Any one in alcohol polyoxyethylene ether, isomerous tridecanol ether phosphate.
3. aluminium alloy anode oxide film hole sealing agent according to claim 1, which is characterized in that the metal salt is that citric acid is sub-
Iron, magnesium acetate 4:4~8 in mass ratio mix.
4. aluminium alloy anode oxide film hole sealing agent according to claim 1, which is characterized in that the preparation side of the multiple emulsion
Method are as follows:
(1) according to parts by weight, 120~130 parts of water, 40~50 parts of mix monomers, 20~25 parts of auxiliary agents, 13~15 parts of auxiliary are taken
Water, mix monomer, auxiliary agent and initiator, are put into reaction kettle by agent, 4~6 parts of initiators first, adjust pH to 8.5~9.5,
Nitrogen protection stirs evenly；
(2) 80~85 DEG C after mixing evenly, are being warming up to, be stirred to react, adjuvant is added, it is cooling, it stands, discharging is collected out
Material, rotary evaporation go to remove water, and collect residue, residue is mixed with ethanol solution 4:5~7 in mass ratio to get
Multiple emulsion.
5. aluminium alloy anode oxide film hole sealing agent according to claim 4, which is characterized in that the mix monomer is acryloyl
Amine, sodium acrylate 7:2~5 in mass ratio mix.
6. aluminium alloy anode oxide film hole sealing agent according to claim 4, which is characterized in that the auxiliary agent is sodium carbonate, vinegar
Sour zinc 4:2~4 in mass ratio mix.
7. aluminium alloy anode oxide film hole sealing agent according to claim 4, which is characterized in that the adjuvant be citric acid,
Hydrolysis of polymaleic anhydride 9~12:2 in mass ratio is mixed.
8. aluminium alloy anode oxide film hole sealing agent according to claim 4, which is characterized in that the initiator is persulfuric acid
Any one in potassium, ammonium persulfate.
9. aluminium alloy anode oxide film hole sealing agent according to claim 1, which is characterized in that the auxiliary material is methyl trimethoxy
Oxysilane, vinyltriethoxysilane 6~9:5~8 in mass ratio mix.
10. the application method of aluminium alloy anode oxide film hole sealing agent described in any one, feature exist according to claim 1~9
In the application method includes the following steps:
A. raw material is taken in parts by weight, is first stirred surfactant, metal salt, multiple emulsion at 80~85 DEG C mixed
It closes, the water and auxiliary material for adding multiple emulsion volume 40~60% are mixed, and aluminium alloy anode oxide film hole sealing agent is obtained；
B. aluminium alloy part is washed, air-dries, is put into aluminium alloy anode oxide film hole sealing agent and is impregnated, soaking temperature is
85~95 DEG C, the time is 20~40min, is taken out, drying, i.e. completion sealing of hole.
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