CN106119924B - It is a kind of to improve aluminium and the method for sealing of aluminium alloy anode oxide film alkali resistance and corrosion resisting property - Google Patents
It is a kind of to improve aluminium and the method for sealing of aluminium alloy anode oxide film alkali resistance and corrosion resisting property Download PDFInfo
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- CN106119924B CN106119924B CN201610455329.6A CN201610455329A CN106119924B CN 106119924 B CN106119924 B CN 106119924B CN 201610455329 A CN201610455329 A CN 201610455329A CN 106119924 B CN106119924 B CN 106119924B
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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
Abstract
The invention belongs to the technical field of surface of automobile industry anodic oxidation workpiece, and in particular to a kind of to improve aluminium and the method for sealing of aluminium alloy anode oxide film alkali resistance and corrosion resisting property.The method for sealing, including carrying out sealing pores three times successively to the aluminium after anodized and Al alloy parts, the method that first time sealing of hole uses is cold seal, hot water envelope, organic acid sealing of hole or rare earth metal salt sealing of hole, for the method that second of sealing of hole uses for passivation or vitrification, the method that third time sealing of hole uses seals hole or boiling water envelope for high temperature.Method for sealing provided by the invention breaks through existing single step or two step hole-sealing technology bottlenecks, utilizes multi-step process, give full play to the advantage of each step sealing of hole, and passivation technology is introduced as intermediate sealing of hole, corrosion resistance, continuous soda acid performance are remarkably improved, and with stronger alkaline resistance properties；Barrier layer is formed using passivation sealing of hole between cold seal and heat-sealing, improves the performances such as its acidproof, alkaline-resisting, continuous acid-fast alkali-proof, moisture-proof comprehensively.
Description
Technical field
The invention belongs to the technical field of surface of automobile industry anodic oxidation workpiece, and in particular to one kind can improve aluminium
And the method for sealing of aluminium alloy anode oxide film alkali resistance and corrosion resisting property.
Background technology
Due to aluminium and the excellent physical and chemical performance of aluminium alloy itself, aluminium and aluminium alloy are in building materials, aerospace, automobile, mobile phone
Also become more and more extensive Deng the application in industry.Aluminium can form a thin layer of natural oxide film in air, this layer is certainly
There is no the performances such as anticorrosive well for the oxidation film so generated, it is impossible to meet the needs of practical application.Industrial quarters is usual at present
Using alumilite process technique, aluminium puts aluminium after a series of pre-treatment steps such as oil removing, polishing, alkaline etching and neutralization
Be placed in as：In the oxidizing solutions such as sulfuric acid, phosphoric acid, under the action of electric field, aluminium material surface is made to generate electrochemical oxidation film, is passed through
Control electric pulse field parameter has the function that control film thickness.This electrochemical conversion film generated by extra electric field mode follows crystal
The rule of growth, it has been investigated that, it is usually electrochemically transformed film there are two structures to form, at the initial stage of anodic oxidation, formation
It is one layer of densification and thin " barrier layer ", during film layer is slowly grown, institutional framework becomes loose, and has perpendicular to aluminium
This layer of structure is referred to as " porous layer " by the hole formation in material direction, people.The density of this micropore reached 76,000,000,000 holes/
cm2, the formation of hole, which greatly changes, is electrochemically transformed film surface characteristic, increases chemism, this tunic can not be very
Good is applied in practice, it is thought that by way of sealing of hole, changes the microporous properties of film layer, make it to meet it is practical should
Demand.The neutral salt spray ability of aluminium material surface, copper accelerated acetic acid salt spray ability, condensed water energy can be improved by carrying out sealing pores
Power, specking ability, acid resistance solution ability, alkali resistance solution ability, heat-resisting ability.
Traditional sealing pores are mainly the cold seal of nickel fluoride system, boiling water closing and the heat-sealing of nickel acetate system.And this
The drawbacks of several common hole-sealing technologies be oxidation film after above-mentioned Seal treatment, can not meet simultaneously acidproof, alkaline-resisting, continuous acidproof
Alkaline-resisting and corrosion-resistant, high temperature resistant and resistance to sassafras such as wash at various performance requirements.Usual cold seal is remarkably improved corrosion resistance, but
It is often unqualified that sealing of hole quality is measured after cold seal immediately, standing time extends, and corrosion weight loss declines instead.Also, cold seal is in height
Temperature is lower to be easier that micro-crack occurs, and be difficult that drying can not pack in time.Although cold seal corrosion resistance is preferable, acid-fast alkali-proof performance
Difference；Individual high-temperature vapor hole sealing technology ratio is much higher using heat-sealing cost；Heat-sealing high, sealing of hole speed to water quality requirement
Slowly ash, acid-fast alkali-proof better performances, are easily played, but corrosion resistance is poor.
At present, occur a variety of cold seals and heat-seal process agent in the market, but due to the particularity of auto parts local environment,
Highly basic and friction during such as carwash, conventional processes can not meet all standard of automobile industry proposition, Wu Faman simultaneously
The demand of sufficient international market.
European patent EP 1873278 proposes sealer using silicate-containing to having carried out the aluminium anodes of Seal treatment
Oxidation film is post-processed, and obtained film surface has relatively same alkali resistance.Patent DE1521664 is proposed aluminium anodes oxygen
Change film and Seal treatment is first carried out in the alkaline aqueous solution of metalline, then post-processed using the aqueous solution of silicate.
The alkali resistance of the aluminium anode oxide film handled through above-mentioned patented technology is greatly improved, but after above-mentioned processing method
Aluminium alloy can not pass through pH1 10min+pH13.5 10min.The continuous acid-fast alkali-proof energy force difference of oxidation film, by heavy corrosion.
Chinese invention patent CN103469276A is closed by being fluorinated nickel salt solution room temperature, titanium zirconium salt solution room temperature is closed,
Last three step process aluminium anode oxide films of silicate solutions high temperature closure find aluminium anodes oxygen after processing in 20 DEG C of tests
Acidproof, the alkaline resistance properties for changing film are significantly improved.The present inventor reappears patent CN103469276A methods processing alumilite process
It is tested for the property after film, it is found that reproducibility is very for its continuous acid-fast alkali-proof performance (10min pH=1+10min pH=13.5)
Difference.
Invention content
The object of the present invention is to provide a kind of for improving aluminium and aluminium alloy anode oxide film alkali resistance and corrosion resisting property
Method for sealing overcomes the shortcomings of single step in the prior art or two step method for sealing, draws using multistep sealing of hole and in multistep process
Enter to be passivated sealing of hole step, to improve the corrosion resistance of aluminium and Al alloy parts and continuous acid-fast alkali-proof performance (10min pH=1+
10min pH=13.5).
The technical solution that the present invention solves above-mentioned technical problem is as follows：One kind can improve aluminium and aluminium alloy anode oxide film is resistance to
The method for sealing of alkalinity and corrosion resisting property, including being sealed three times successively to the aluminium after anodized and Al alloy parts
Hole is handled, and the method that first time sealing of hole uses is sealed for cold seal, hot water envelope, organic acid sealing of hole or rare earth metal salt sealing of hole, second
For the method that hole uses for passivation or vitrification, the method that third time sealing of hole uses seals hole or boiling water envelope for high temperature.
Based on the above technical solution, the present invention can also be improved as follows.
Specifically, the cold seal, for nickel fluoride cold seal or without nickel cold seal, the hot water envelope is nickel acetate hot water envelope or acetic acid
Cobalt hot water seals；The organic acid sealing of hole is to carry out dipping sealing of hole to aluminium and Al alloy parts using organic acid pore-sealing liquid, described to have
Machine acid pore-sealing liquid is made of following each component：Stearic acid 25-45%, organic alcohol solvent 50-75%, corrosion inhibiter 0.1-0.5%,
Described in organic alcohol solvent be one kind in the common alcoholic solvent such as ethyl alcohol, propyl alcohol, isopropanol；The rare earth metal salt sealing of hole is makes
Dipping sealing of hole is carried out to aluminium and Al alloy parts with rare earth metal salt solutions, the rare earth metal salt solutions are by following components structure
Into：Cerous nitrate 0.5-5%, hydrogen peroxide 0.1-0.5%, pH adjusting agent 0.2-3%, surplus are water.
Specifically, the passivation is that processing is passivated to workpiece using passivating solution.
Preferably, the passivating solution is the passivating solution containing hexavalent chromium or passivating solution or nothing containing trivalent chromic ion
Chromium passivating liquid.Passivator and corresponding passivation operation wherein containing trivalent chromium is in Chinese invention patent CN
201310051225.5, it is disclosed in CN 201310049650.0 and CN 201310050855.0.
Specifically, the vitrification is to carry out vitrification processing to workpiece using vitrification liquid.
Specifically, the vitrification liquid is made of following each component：Fluozirconate 1-3%, silane 0.5%-3%, You Jirong
Agent 2-10%, nano-silicon 0.1-2%, corrosion inhibiter 0.1-2%, surplus are water.
Specifically, the hole sealing agent that the high temperature heat-sealing hole uses contains silane and fluozirconate, high temperature heat-sealing hole
Sealing of hole temperature is 70-98 DEG C, and the sealing of hole time is 15-40min.
In order to further improve aluminium and aluminium alloy anode oxide film alkali resistance and corrosion resisting property, the 4th sealing of hole is further included：
The workpiece that third time sealing pores finish is cleaned and is placed in closed container, hot pressing sealing of hole again is carried out to workpiece using ultra-pure water
Processing, slowly increases the temperature in the closed container to a certain specific temperature T, 150≤T≤200 DEG C, and keep the specific temperature
The time for spending T is t, and t >=60min, cooled to room temperature, pressure gauge is measured in the container when reaching the specific temperature T
Pressure value P, 476.10≤P≤1561.35kPa, the conductivity of the ultra-pure water is Κ, the μ s/cm of Κ≤30.
Aluminium and Al alloy parts are needed before being handled through method for sealing provided by the invention through oil removing, washing, alkaline etching, water
Wash, chemical polishing, washing, ash disposal are placed in the sulfuric acid solution of 190 ± 10g/L of concentration and carry out anodic oxidation, energization 30min,
Current density is 1A/dm2, workpiece after anodic oxidation is spare after repeatedly washing is cleaned.Use sealing of hole side provided by the invention
When method carries out sealing pores to aluminium and aluminium alloy anode oxide film, after each sealing of hole is completed, it is both needed to wash workpiece, water
Scouring water is ion exchange water or multi-stage distilled water, and conductivity should be less than 50 μ s/cm.
Compared with prior art, beneficial effects of the present invention are：Existing single step or two step hole-sealing technology bottlenecks are broken through, are utilized
Multi-step process gives full play to the advantage of each step sealing of hole, and sealing pores are carried out using multistep processes, and introduces passivation technology as intermediate
Sealing of hole is remarkably improved corrosion resistance, continuous soda acid performance (being tested by pH1 10min+pH13.5 10min), and with stronger
Alkaline resistance properties (being tested by carwash 13.5)；Of the invention initiative is introduced into passivation technology in multistep processes hole-sealing technology,
Barrier layer is formed using passivation sealing of hole between cold seal and heat-sealing, improves its acidproof, alkaline-resisting, continuous acid-fast alkali-proof, moisture-proof comprehensively
Etc. performances, while meet all standard of automobile industry.
Description of the drawings
Fig. 1 improves aluminium and the method for sealing of aluminium alloy anode oxide film alkali resistance and corrosion resisting property to be provided by the invention
Process flow chart.
Specific embodiment
The principle of the present invention and feature are described below in conjunction with the drawings and specific embodiments, example is served only for solving
The present invention is released, is not intended to limit the scope of the present invention.
In the present invention using to drug be commercial product, the present invention in using to method be unless otherwise noted
Conventional method.
1st, the pre-treatment of aluminum or aluminum alloy workpiece
Degreasing：Using the alkalescent degreasing agent Phoenix clean150 or 151 of 40-60g/L, under the conditions of 40-80 DEG C
Ungrease treatment 2-10min takes out, and is cleaned with clear water；
Alkaline etching：With the piece aqueous alkali of 40-50g/L 10-180s is handled at 50-60 DEG C；
Ash disposal:In each remained on surface lye, remove the residue after alkaline etching, it is and clean with pure water rinsing；
2nd, anodic oxidation
Use the H of a concentration of 160-300g/L2SO4Solution is as medium, and using stainless steel plate as cathode, aluminium is as sun
Pole aoxidizes 10-60min, current density 0.5-6A/dm2, washed after oxidation；
3rd, it is the content of simplification embodiment, each secondary sealing pores is summarized as follows using the actual conditions of reagent and sealing of hole：
First time sealing of hole (cold seal, hot water envelope, organic acid sealing of hole or rare earth metal salt sealing of hole):By the aluminium after oxidation processes
Be placed in the hole sealing agent phoenix seal180 of 4.5-5.5g/L, phoenix seal147, phoenix seal 181 or
(it is Wuhan sail electrification Science and Technology Co., Ltd./Wuhan Fei Nike Chemical Co., Ltd.s production in phoenix seal182
Product, it is possible to use other commercially available conventional cold seals), it is washed after handling 10-40min under conditions of 15-35 DEG C；Or nickel salt hot water envelope
It is washed after handling 10-40min under conditions of 85-95 DEG C with hole sealing agent；Or using organic acid pore-sealing liquid to aluminium and aluminium alloy
Workpiece carries out dipping sealing of hole (sealing of hole temperature and time is close with cold seal), and the organic acid pore-sealing liquid is made of following each component：
Stearic acid 25-45%, organic alcohol solvent 50-75%, corrosion inhibiter 0.1-0.5%, wherein the organic alcohol solvent is ethyl alcohol, third
One kind in the common alcoholic solvent such as alcohol, isopropanol；Or with rare earth metal salt solutions sealing of hole (sealing of hole temperature and time and cold seal
It is close), the rare earth metal salt solutions are made of following components：Cerous nitrate 0.5-5%, hydrogen peroxide 0.1-0.5%, pH adjusting agent
0.2-3%, surplus are water.
Second of sealing of hole (passivation or vitrification):Aluminium after a sealing pores is placed in the aluminium passivation of 20-60ml/L
In liquid Al-100,338 or 130, washed after handling 10-40min under conditions of 15-35 DEG C；Or handled using vitrification liquid, it makes pottery
Change liquid to be made of following each component：Fluozirconate 1-3%, silane 0.5%-3%, organic solvent 2-10%, nano-silicon 0.1-
2%, corrosion inhibiter 0.1-2%, surplus is water.
Third time sealing of hole (high temperature heat seal hole or boiling water envelope):Through primary, secondary hole sealing, treated that aluminium is placed in 290A/
290S, 915/935 (for Wuhan sail electrification Science and Technology Co., Ltd./Wuhan Fei Nike Chemical Co., Ltd.s product, wherein
The specific compositions of 290A/290S are identical with the silicate systems pore-sealing liquid disclosed in patent of invention CN104862762) in, in 70-98
It is washed after handling 15-40min at DEG C；
4th sealing of hole (hot pressing again sealing of hole)：Above-mentioned workpiece is carried out using ultra-pure water in high temperature high voltage resistant closed container
Hot pressing sealing pores again slowly increase the temperature in the closed container to a certain specific temperature T, 150≤T≤200 DEG C, and protect
The time for holding specific temperature T is t, and t >=60min, cooled to room temperature, pressure gauge measures when reaching the specific temperature T
Pressure value P in the container, 476.10≤P≤1561.35kPa, the conductivity of the ultra-pure water are Κ, the μ s/ of Κ≤30
cm。
The work provided by the invention for improving aluminium and the method for sealing of aluminium alloy anode oxide film alkali resistance and corrosion resisting property
Skill flow chart is as shown in Figure 1, in four sealing of holes, and sealing of hole can be selected as needed again for hot pressing, to continuous acid-fast alkali-proof, resistance to
The performance requirements such as scouring performance for the moment, can also not select one or more of four kinds of sealing of holes to carry out sealing pores as needed.
Embodiment 1:Nickel fluoride cold seal+sexavalence chromium passivating+boiling water envelope.
Embodiment 2:Nickel fluoride cold seal+trivalent chromium passivation+boiling water envelope.
Embodiment 3:Nickel salt hot water envelope+chromium-free deactivation+high temperature sealing of hole.
Embodiment 4:Nickel salt hot water envelope+vitrification+boiling water envelope.
Embodiment 5:Nickel salt hot water envelope+chromium-free deactivation+high temperature sealing of hole.
Embodiment 6:Without nickel cold seal+chromium-free deactivation+high temperature sealing of hole+hot pressing sealing of hole again.
Embodiment 7:No nickel cold seal+vitrification+boiling water envelope.
Embodiment 8:Nickel fluoride cold seal+vitrification+high temperature sealing of hole+hot pressing sealing of hole again.
Embodiment 9:Without nickel cold seal+vitrification+high temperature sealing of hole.
Embodiment 10：Organic acid sealing of hole+sexavalence chromium passivating+boiling water envelope.
Embodiment 11：Organic acid sealing of hole+vitrification+high temperature sealing of hole.
Embodiment 12：Rare earth metal salt sealing of hole+vitrification+high temperature sealing of hole.
Comparative example 1：Nickel fluoride cold seal.
Comparative example 2：Boiling water seals.
Comparative example 3：High temperature sealing of hole.
Comparative example 4：Nickel fluoride cold seal+boiling water envelope.
Comparative example 5：Nickel fluoride cold seal+high temperature sealing of hole.
4th, performance test
(1) acid resistance is tested
Prepare the acid solution (HCl of pH=1:0.1mol/L), workpiece is soaked in the acid solution after 10min and taken
Go out, flowing water dries up after rinsing well, observation workpiece surface appearance whether there is significant change, if without significant change, workpiece it is acidproof
PH=1.0 tests pass through, and otherwise do not pass through.
(2) alkali resistance is tested
Prepare the alkaline solution (NaOH of pH=13.5:12.7g/L sodium phosphate：2g/L,NaCl：0.33g/L), by workpiece
It is soaked in the alkaline solution and is taken out after 10min, flowing water dries up after rinsing well, and observation workpiece surface appearance whether there is apparent change
Change, if without significant change, the alkaline-resisting pH=13.5 tests of workpiece pass through, and otherwise do not pass through.
(3) continuous acid-proof alkaline test
First by workpiece in pH=1 (HCl:10min is impregnated in acid solution 0.1mol/L), after rinsing well, is placed into
PH=13.5 (NaOH:12.7g/L sodium phosphate：2g/L,NaCl：10min is impregnated in solution 0.33g/L), after rinsing well
Observation surface has unchanged.
(4) 13.5 performance test of carwash
This test uses the experiment of simulated automotive industry carwash process：It is rubbed back and forth workpiece table with the power of 1kg with fiber cloth
Face 100 times is taken out after being then immersed in following alkaline 13.5 solution 10min again, observes workpiece surface whether there is change after rinsing well
Change, unchanged representative is tested by carwash 13.5.
PH13.5 alkaline solutions are prepared：NaOH:4g/L, sodium phosphate：4.64g/L,NaCl：The appearance of 0.33g/L to 1000mL
In measuring bottle, and it is diluted with water to graduation mark.
(5) copper accelerated acetic acid salt spray experiment (CASS)
This method performs national standard：GB/T 12967.3-2008：《Aluminium and aluminium alloy anode oxide film detection method the 3rd
Part:Copper accelerated acetic acid salt spray tests (CASS experiments)》.
Specifically:This method is carried out using dedicated CASS salt fog cabinets, under conditions of (50 scholar 2) DEG C, pass through compress it is empty
The acid solution of pH=3.05 ± 0.05 is atomized by gas, continuous to spray.Acid mist is deposited in specimen surface, and sample is made to generate centainly
Variation.Acid solution preparation method：The sodium chloride solution of 50 ± 5g/L is prepared, adds in the copper chloride of (0.26 ± 0.02) g/L, then
Suitable glacial acetic acid adjustment pH to 3.05 ± 0.05 or so is added in thereto.
(6) neutral salt spray test (NSS)
This detection method performs：GB/T 10125-2012：《Artificial atmosphere corrosion test (salt spray test)》.
Specifically：This method carries out in dedicated salt fog cabinet, and under conditions of (35 scholar 2) DEG C, passing through compressed air will
Neutral sodium chloride solution (its a concentration of 50g/L scholar 5g/L) atomization, is then deposited in specimen surface.
(7) hot-cracking resistance is tested
Workpiece is first placed into 30s in acetone solvent, washes away greasy dirt, after air-drying, then is uprightly put into warmed-up 85-110 DEG C
It in baking oven, is taken out after constant temperature 1h, whether observation surface has crackle.
(8) anti-moisture test
This experiment carries out in dedicated resistance to wet tank, by sample be placed on temperature be 40 ± 2 DEG C, relative humidity be 98% ±
In 2% condensed water experimental box.Arrangement angle of the test specimen in chamber should be greater than or equal to 60 DEG C, and in this feelings
In order to sufficient heat release, they cannot mutually be abutted under condition.
The results are shown in table below to each embodiment performance test, and (wherein OK is represented to be tested by this, and NO is does not pass through
This tests)：
By the test result of upper table it is found that the sun through the processed aluminium of method provided by the invention and aluminum alloy anode workpiece
Pole oxidation film has the performances such as outstanding acidproof, alkaline-resisting, continuous acid-fast alkali-proof, moisture-proof, can meet the items of automobile industry simultaneously
Standard.From comparative example as it can be seen that when lacking vitrification or passivation step, the anode oxide film of aluminium and aluminum alloy anode workpiece it is each
Item performance has decline, especially has larger impact to continuous acid-fast alkali-proof performance and 13.5 performance of carwash.
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all the present invention spirit and
Within principle, 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 improve aluminium and the method for sealing of aluminium alloy anode oxide film alkali resistance and corrosion resisting property, which is characterized in that packet
It includes and carries out sealing pores three times successively to the aluminium after anodized and Al alloy parts, the method that first time sealing of hole uses
For cold seal, hot water envelope, organic acid sealing of hole or rare earth metal salt sealing of hole, the method that second of sealing of hole uses is is passivated or vitrification, and the
The method that sealing of hole uses three times seals hole or boiling water envelope for high temperature.
A kind of aluminium and the sealing of hole of aluminium alloy anode oxide film alkali resistance and corrosion resisting property are improved 2. according to claim 1
Method, which is characterized in that for the cold seal for nickel fluoride cold seal or without nickel cold seal, the hot water envelope is nickel acetate hot water envelope or acetic acid
Cobalt hot water seals；The organic acid sealing of hole is to carry out dipping sealing of hole to aluminium and Al alloy parts using organic acid pore-sealing liquid, described to have
Machine acid pore-sealing liquid is made of following each component：Stearic acid 25-45%, organic alcohol solvent 50-75%, corrosion inhibiter 0.1-0.5%；Institute
It is to carry out dipping sealing of hole, the rare earth metal to aluminium and Al alloy parts using rare earth metal salt solutions to state rare earth metal salt sealing of hole
Salting liquid is made of following components：Cerous nitrate 0.5-5%, hydrogen peroxide 0.1-0.5%, pH adjusting agent 0.2-3%, surplus are water.
A kind of aluminium and the sealing of hole of aluminium alloy anode oxide film alkali resistance and corrosion resisting property are improved 3. according to claim 1
Method, which is characterized in that the passivation is that processing is passivated to workpiece using passivating solution.
A kind of aluminium and the sealing of hole of aluminium alloy anode oxide film alkali resistance and corrosion resisting property are improved 4. according to claim 3
Method, which is characterized in that the passivating solution for the passivating solution containing hexavalent chromium or the passivating solution containing trivalent chromic ion or
Chromium-free passivation liquid.
A kind of aluminium and the sealing of hole of aluminium alloy anode oxide film alkali resistance and corrosion resisting property are improved 5. according to claim 1
Method, which is characterized in that the vitrification is to carry out vitrification processing to workpiece using vitrification liquid.
A kind of aluminium and the sealing of hole of aluminium alloy anode oxide film alkali resistance and corrosion resisting property are improved 6. according to claim 5
Method, which is characterized in that the vitrification liquid is made of following each component：Fluozirconate 1-3%, silane 0.5%-3%, You Jirong
Agent 2-10%, nano-silicon 0.1-2%, corrosion inhibiter 0.1-2%, surplus are water.
A kind of aluminium and the sealing of hole of aluminium alloy anode oxide film alkali resistance and corrosion resisting property are improved 7. according to claim 1
Method, which is characterized in that the hole sealing agent that the high temperature heat-sealing hole uses contains silane and fluozirconate.
A kind of aluminium and the sealing of hole of aluminium alloy anode oxide film alkali resistance and corrosion resisting property are improved 8. according to claim 7
Method, which is characterized in that the sealing of hole temperature in high temperature heat-sealing hole is 70-98 DEG C, and the sealing of hole time is 15-40min.
9. aluminium and aluminium alloy anode oxide film alkali resistance and anti-corrosion can be improved according to claim 1 to 8 any one of them one kind
The method for sealing of performance, which is characterized in that further include the 4th sealing of hole：The workpiece that third time sealing pores finish is cleaned into postposition
In in closed container, hot pressing sealing pores again are carried out to workpiece using ultra-pure water.
A kind of aluminium and the envelope of aluminium alloy anode oxide film alkali resistance and corrosion resisting property are improved 10. according to claim 9
Hole method, which is characterized in that the specific requirement of sealing pores is slowly to increase the temperature in the closed container again for the hot pressing
To a certain specific temperature T, 150≤T≤200 DEG C, and it is t to be kept for time of specific temperature T, t >=60min is naturally cooled to
Room temperature, pressure gauge measures the pressure value P in the container when reaching the specific temperature T, 476.10≤P≤1561.35kPa,
The conductivity of the ultra-pure water is Κ, the μ s/cm of Κ≤30.
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| CN111809214B (en) * | 2019-04-12 | 2022-03-22 | 平顶山市美伊金属制品有限公司 | Method for sealing pores on surface of oxidized substrate |
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