CN107151810B - Aluminium alloy extrusions and its manufacturing method - Google Patents
Aluminium alloy extrusions and its manufacturing method Download PDFInfo
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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
- C25D11/06—Anodisation of aluminium or alloys based thereon characterised by the electrolytes used
- C25D11/08—Anodisation of aluminium or alloys based thereon characterised by the electrolytes used containing inorganic acids
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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
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Abstract
The invention discloses a kind of aluminium alloy extrusions and its manufacturing method, the manufacturing method of aluminium alloy extrusions comprises the steps of: degreasing, alkali cleaning, anodic oxidation, sealing of hole, drying.Present invention improves over the hole-sealing technologies of aluminium alloy anode oxide technique and aluminum alloy surface oxidation film, the oxidation film for manufacturing obtained aluminium alloy extrusions has good hardness, the corrosion resistance and wearability of aluminum profile improve after sealing pores, can be widely applied to the fields such as building, aviation, automobile, medical treatment.
Description
Technical field
The present invention relates to aluminum profile technical field more particularly to a kind of aluminium alloy extrusions and its manufacturing methods.
Background technique
Aluminium alloy density is smaller, and intensity is high, and conductive, excellent heat conductivity, plasticity is good, no black brittleness, easy processing, therefore answers
With extensive.But the corrosion potential of aluminium alloy is relatively negative, and aluminium and its alloy is made to be easy to corrode.In order to improve aluminium alloy
Comprehensive performance is handled aluminium alloy frequently with process for treating surface.Aluminium alloy anode oxide reaction is that aluminium alloy is adding outside
The reaction for carrying out electrochemical oxidation under voltage by electric current forms the film of one layer of aluminium oxide in aluminum alloy surface, improves aluminium and close
Hardness, the corrosion resistance of gold.However, the microhardness of the aluminium alloy anode oxide film of technology preparation at present is generally relatively low, it is comprehensive
Mechanical property is not high, is unable to satisfy industrial requirement.Aluminum alloy surface obtains one layer of anode after anodized
Oxidation film is isolated, but oxidation film layer is needed containing nanoscale hole as layer protecting film with extraneous perishable medium
Seal treatment is carried out to aluminium alloy anode oxide film, to further increase its corrosion resistance etc..Common method has hot water envelope
It closes, nickel cobalt salt closing method, chromic salts closing method etc., but these methods can all generate different degrees of pollution, lack a kind of environment
The oxidation film sealing pores method of friendly.
The present invention provides a kind of manufacturing method of aluminium alloy extrusions, the aluminium alloy extrusions hardness manufactured is high, anti-corrosion
Property and wearability are good.
Summary of the invention
Aiming at the above shortcomings existing in the prior art, the first technical problem to be solved by the present invention is to provide a kind of aluminium
The manufacturing method of alloy profile.
The second technical problem to be solved by the present invention is to provide a kind of aluminium alloy extrusions.
Object of the present invention is to what is be achieved through the following technical solutions:
A kind of manufacturing method of aluminium alloy extrusions comprising the steps of:
(1) degreasing；
(2) alkali cleaning；
(3) anodic oxidation；
(4) sealing of hole；
(5) dry.
A kind of manufacturing method of aluminium alloy extrusions, comprises the steps of, described part is parts by weight:
(1) degreasing: 100-150 parts of sulfuric acid being added in 1000-2000 parts of water and are uniformly mixed, ungrease treatment liquid is obtained, will
2-10 parts of aluminum alloy base materials are immersed in ungrease treatment liquid, and dipping temperature is 25-35 DEG C, dip time 5-10min, take out aluminium
Alloy base material is rinsed with water clean；
(2) alkali cleaning: 30-80 parts of sodium hydroxides are added in 1000-2000 parts of water and are uniformly mixed, alkali wash water is obtained, will take off
Aluminum alloy base material after rouge is immersed in alkali wash water, and dipping temperature is 55-65 DEG C, dip time 3-5min, takes out aluminium alloy
Substrate is rinsed with water clean；
(3) anodic oxidation: 150-250 parts of sulfuric acid, 1-3 parts of aluminum sulfate are added in 1000-2000 parts of water and are uniformly mixed, are obtained
To oxidation electrolyte, the aluminum alloy base material after alkali cleaning is put into the electrolytic cell equipped with oxidation electrolyte, is made with aluminum alloy base material
For anode, using stereotype as cathode, anodic oxidation condition is DC voltage 12-15V, the temperature of oxidation electrolyte is 20-30 DEG C,
Then aluminum alloy base material after anodic oxidation is rinsed with water completely, aluminum alloy base material table after anodic oxidation by time 35-50min
Face forms oxidation film；
(4) aluminum alloy base material after anodic oxidation sealing of hole: is immersed in 35- in 1000-2000 parts 98-100 DEG C of water
Then 50min drains surface moisture；
(5) dry: by the aluminum alloy base material after sealing of hole in 60-90 DEG C of dry 2-8h to get aluminium alloy extrusions.
A kind of manufacturing method of aluminium alloy extrusions, comprises the steps of, described part is parts by weight:
(1) degreasing: 100-150 parts of sulfuric acid being added in 1000-2000 parts of water and are uniformly mixed, ungrease treatment liquid is obtained, will
2-10 parts of aluminum alloy base materials are immersed in ungrease treatment liquid, and dipping temperature is 25-35 DEG C, dip time 5-10min, take out aluminium
Alloy base material is rinsed with water clean；
(2) alkali cleaning: 30-80 parts of sodium hydroxides are added in 1000-2000 parts of water and are uniformly mixed, alkali wash water is obtained, will take off
Aluminum alloy base material after rouge is immersed in alkali wash water, and dipping temperature is 55-65 DEG C, dip time 3-5min, takes out aluminium alloy
Substrate is rinsed with water clean；
(3) anodic oxidation: by 150-250 parts of sulfuric acid, 1-3 parts of aluminum sulfate, 0.05-0.5 parts of lanthanum sulfates, 1-4 parts of Vitamin Cs
Acid is added in 1000-2000 parts of water and is uniformly mixed, and obtains oxidation electrolyte, and the aluminum alloy base material after alkali cleaning is put into equipped with oxidation
In the electrolytic cell of electrolyte, using aluminum alloy base material as anode, using stereotype as cathode, anodic oxidation condition is DC voltage
12-15V, oxidation electrolyte temperature be 20-30 DEG C, time 35-50min, then by after anodic oxidation aluminum alloy base material use
Water is rinsed well, and aluminum alloy base material surface forms oxidation film after anodic oxidation；
(4) aluminum alloy base material after anodic oxidation sealing of hole: is immersed in 35- in 1000-2000 parts 98-100 DEG C of water
Then 50min drains surface moisture；
(5) dry: by the aluminum alloy base material after sealing of hole in 60-90 DEG C of dry 2-8h to get aluminium alloy extrusions.
A kind of manufacturing method of aluminium alloy extrusions, comprises the steps of, described part is parts by weight:
(1) degreasing: 100-150 parts of sulfuric acid being added in 1000-2000 parts of water and are uniformly mixed, ungrease treatment liquid is obtained, will
2-10 parts of aluminum alloy base materials are immersed in ungrease treatment liquid, and dipping temperature is 25-35 DEG C, dip time 5-10min, take out aluminium
Alloy base material is rinsed with water clean；
(2) alkali cleaning: 30-80 parts of sodium hydroxides are added in 1000-2000 parts of water and are uniformly mixed, alkali wash water is obtained, will take off
Aluminum alloy base material after rouge is immersed in alkali wash water, and dipping temperature is 55-65 DEG C, dip time 3-5min, takes out aluminium alloy
Substrate is rinsed with water clean；
(3) anodic oxidation: by 150-250 parts of sulfuric acid, 1-3 parts of aluminum sulfate, 0.05-0.5 parts of lanthanum sulfates, 1-4 parts of Vitamin Cs
Acid is added in 1000-2000 parts of water and is uniformly mixed, and obtains oxidation electrolyte, and the aluminum alloy base material after alkali cleaning is put into equipped with oxidation
In the electrolytic cell of electrolyte, using aluminum alloy base material as anode, using stereotype as cathode, anodic oxidation condition is DC voltage
12-15V, oxidation electrolyte temperature be 20-30 DEG C, time 35-50min, then by after anodic oxidation aluminum alloy base material use
Water is rinsed well, and aluminum alloy base material surface forms oxidation film after anodic oxidation；
(4) 1000-1500 sealing of hole: is added in 200-250 parts of modifying agent, 0.5-1.5 parts of hydrochloric acid, 1000-1500 parts of ethyl alcohol
It is uniformly mixed in part water and obtains mixed liquor A, then add 200-250 parts of isobutyl triethoxy silanes, 1000-1500 parts of ethyl alcohol
Enter to be uniformly mixed in 1000-1500 parts of water and obtain mixed liquid B, mixed liquid B is added in mixed liquor A, 500-1000rpm, 20-30
DEG C stirring 12-24h, obtain colloidal sol, the aluminum alloy base material after anodic oxidation be immersed in 20-30 DEG C of colloidal sol, dip time
For 5-15min；The modifying agent is trimethyl phosphate；
(5) dry: by the aluminum alloy base material after sealing of hole in 60-90 DEG C of dry 2-8h to get aluminium alloy extrusions.
A kind of manufacturing method of aluminium alloy extrusions, comprises the steps of, described part is parts by weight:
(1) degreasing: 100-150 parts of sulfuric acid being added in 1000-2000 parts of water and are uniformly mixed, ungrease treatment liquid is obtained, will
2-10 parts of aluminum alloy base materials are immersed in ungrease treatment liquid, and dipping temperature is 25-35 DEG C, dip time 5-10min, take out aluminium
Alloy base material is rinsed with water clean；
(2) alkali cleaning: 30-80 parts of sodium hydroxides are added in 1000-2000 parts of water and are uniformly mixed, alkali wash water is obtained, will take off
Aluminum alloy base material after rouge is immersed in alkali wash water, and dipping temperature is 55-65 DEG C, dip time 3-5min, takes out aluminium alloy
Substrate is rinsed with water clean；
(3) anodic oxidation: by 150-250 parts of sulfuric acid, 1-3 parts of aluminum sulfate, 0.05-0.5 parts of lanthanum sulfates, 1-4 parts of Vitamin Cs
Acid is added in 1000-2000 parts of water and is uniformly mixed, and obtains oxidation electrolyte, and the aluminum alloy base material after alkali cleaning is put into equipped with oxidation
In the electrolytic cell of electrolyte, using aluminum alloy base material as anode, using stereotype as cathode, anodic oxidation condition is DC voltage
12-15V, oxidation electrolyte temperature be 20-30 DEG C, time 35-50min, then by after anodic oxidation aluminum alloy base material use
Water is rinsed well, and aluminum alloy base material surface forms oxidation film after anodic oxidation；
(4) sealing of hole: by 200-250 parts of modifying agent, 0.5-1.5 parts of hydrochloric acid, 5-15 parts of zinc chloride, 1000-1500 parts of ethyl alcohol
Be added it is uniformly mixed in 1000-1500 part water obtain mixed liquor A, then by 200-250 parts of isobutyl triethoxy silanes,
1000-1500 parts of ethyl alcohol, which are added to be uniformly mixed in 1000-1500 parts of water, obtains mixed liquid B, and mixed liquid B is added in mixed liquor A,
500-1000rpm, 20-30 DEG C of stirring 12-24h, obtain colloidal sol, the aluminum alloy base material after anodic oxidation are immersed in 20-30 DEG C
Colloidal sol in, dip time 5-15min；The modifying agent is trimethyl phosphate and/or tributyl citrate；
(5) dry: by the aluminum alloy base material after sealing of hole in 60-90 DEG C of dry 2-8h to get aluminium alloy extrusions.
Preferably, the drying temperature of aluminum alloy base material is 70 DEG C in the step (5).
Preferably, the drying time of aluminum alloy base material is 4h in the step (5).
The present invention also provides a kind of aluminium alloy extrusions, are fabricated using the above method.
Aluminium alloy extrusions of the present invention and its manufacturing method, the technique for improving anodic oxidation and oxidation film sealing of hole, system
The oxidation film for the aluminium alloy extrusions made has good hardness, the corrosion resistance of aluminium alloy extrusions and wear-resisting after sealing pores
Property improve, can be widely applied to the fields such as building, aviation, automobile, medical treatment.
Specific embodiment
Oxidation film hardness test: the aluminium alloy extrusions without sealing of hole is prepared according to step in embodiment (1)-step (3), is adopted
With the microhardness for the oxidation film that 2000 type microhardness tester of Fischer HM test aluminium alloy section surface is formed, load is
500mN, load time 20s, the number of parallel sample are 3, and each parallel sample chooses 10 equally distributed different surveys
Pilot measures, and is averaged the microhardness for sample.
Corrosion resistance test: aluminium alloy extrusions is manufactured according to step in embodiment (1)-step (5), using electrochemical workstation
(model: CHI660D) analyzes the corrosion resisting property of aluminium alloy extrusions, and reference electrode is saturated calomel electrode (SCE), and auxiliary electrode is
Pt electrode, using the sodium chloride solution of mass fraction 3.5% as corrosive medium, pumping signal is sine wave, frequency 105-10- 2Hz tests electrochemical impedance, and electrochemical impedance value is bigger, and corrosion resistance is better.
Crocking resistance test: aluminium alloy extrusions is manufactured according to step in embodiment (1)-step (5), using high temperature friction
The wearability of abrasion tester (production of CSEM company of Switzerland, model THT07-135) research oxidation film, is 25 DEG C of progress in temperature
Test, the ZrO that friction bead is diameter 6mm2Ceramic wear-resisting ball, friction velocity 4cm/s, load 5N, friction length 8mm,
Sample rubs 350 turns, records the quality m of the aluminium alloy extrusions before and after friction test1And m2, calculate mass loss rate, mass loss
Rate=(m1-m2)/m1× 100%.
Each raw material introduction in embodiment:
Aluminum alloy base material, using 2024 aluminium alloys, composition is shown in Table 1.
The composition table of table 1:2024 aluminium alloy
| Mn | Cu | Zn | Cr | Ti | Mg | Si | Fe | Al | |
| Mass fraction/% | 0.46 | 4.36 | 0.07 | <0.01 | 0.01 | 1.49 | 0.14 | 0.25 | Surplus |
Sulfuric acid, the concentrated sulfuric acid for the use of mass fraction being 98%, by Dalian, sea-freight chemical reagent work is provided.
Sodium hydroxide, No. CAS: 1310-73-2, Zhengzhou Brian Jacks Chemical Co., Ltd. provides.
Aluminum sulfate, No. CAS: 10043-01-3, Lian Da Fine Chemical Co., Ltd of Jingzhou City provides.
Lanthanum sulfate, No. CAS: the happy Chemical Co., Ltd. of 10099-60-2, Jin Jin provides.
Ascorbic acid, i.e. L-AA, No. CAS: 50-81-7, Zhengzhou Brian Jacks Chemical Co., Ltd. provides.
Stereotype, the plating stereotype that Hua Senda metal material Co., Ltd of Shenzhen provides, content 99.99%, volume are
100cm×100cm×8cm。
Trimethyl phosphate, No. CAS: 512-56-1, Zhangjiagang Ya Rui Chemical Co., Ltd. provides.
Tributyl citrate, No. CAS: 77-94-1, Nanjing chemical reagent limited liability company provides.
Zinc chloride, No. CAS: 7646-85-7, Nanjing chemical reagent limited liability company provides.
Ethyl alcohol, using dehydrated alcohol, Nanjing chemical reagent limited liability company is provided.
Hydrochloric acid, the concentrated hydrochloric acid that the mass fraction that Nanjing chemical reagent limited liability company provides is 37%.
Isobutyl triethoxy silane, No. CAS: 17980-47-1, Qufu City Wanda Chemical Co., Ltd. provides.
Embodiment 1
The manufacturing method of aluminium alloy extrusions, comprises the steps of, described part is parts by weight:
(1) degreasing: 130 parts of sulfuric acid are added in 1000 parts of water and are uniformly mixed, ungrease treatment liquid is obtained, is by 4 parts, volume
100cm × 100cm × 5cm aluminum alloy base material is immersed in ungrease treatment liquid, and dipping temperature is 25 DEG C, and dip time is
8min takes out aluminum alloy base material, is rinsed with water clean；
(2) alkali cleaning: 50 parts of sodium hydroxides are added in 1000 parts of water and are uniformly mixed, alkali wash water are obtained, by the aluminium after degreasing
Alloy base material is immersed in alkali wash water, and dipping temperature is 55 DEG C, dip time 3min, is taken out aluminum alloy base material, is rinsed with water
Completely；
(3) anodic oxidation: 150 parts of sulfuric acid, 1 part of aluminum sulfate are added in 1000 parts of water and are uniformly mixed, oxidization electrolysis is obtained
Aluminum alloy base material after alkali cleaning is put into the electrolytic cell equipped with oxidation electrolyte, using aluminum alloy base material as anode, with lead by liquid
Plate is as cathode, and anodic oxidation condition is DC voltage 13V, the temperature of oxidation electrolyte is 25 DEG C, time 35min, then will
Aluminum alloy base material after anodic oxidation is rinsed with water completely, and aluminum alloy base material surface forms oxidation film after anodic oxidation；
(4) sealing of hole: the aluminum alloy base material after anodic oxidation is immersed in 45min in 1500 parts 100 DEG C of water, is then drained
Surface moisture；
(5) dry: by the aluminum alloy base material after sealing of hole in 70 DEG C of dry 4h to get aluminium alloy extrusions.
Embodiment 2
The manufacturing method of aluminium alloy extrusions, comprises the steps of, described part is parts by weight:
(1) degreasing: 130 parts of sulfuric acid are added in 1000 parts of water and are uniformly mixed, ungrease treatment liquid is obtained, is by 4 parts, volume
100cm × 100cm × 5cm aluminum alloy base material is immersed in ungrease treatment liquid, and dipping temperature is 25 DEG C, and dip time is
8min takes out aluminum alloy base material, is rinsed with water clean；
(2) alkali cleaning: 50 parts of sodium hydroxides are added in 1000 parts of water and are uniformly mixed, alkali wash water are obtained, by the aluminium after degreasing
Alloy base material is immersed in alkali wash water, and dipping temperature is 55 DEG C, dip time 3min, is taken out aluminum alloy base material, is rinsed with water
Completely；
(3) 150 parts of sulfuric acid, 1 part of aluminum sulfate, 0.12 part of lanthanum sulfate, 1 part of ascorbic acid anodic oxidation: are added 1000 parts
It is uniformly mixed in water, obtains oxidation electrolyte, the aluminum alloy base material after alkali cleaning is put into the electrolytic cell equipped with oxidation electrolyte,
Using aluminum alloy base material as anode, using stereotype as cathode, anodic oxidation condition is the temperature of DC voltage 14V, oxidation electrolyte
Degree is 25 DEG C, time 35min, is then rinsed with water the aluminum alloy base material after anodic oxidation completely, aluminium alloy after anodic oxidation
Substrate surface forms oxidation film；
(4) sealing of hole: the aluminum alloy base material after anodic oxidation is immersed in 45min in 1500 parts 100 DEG C of water, is then drained
Surface moisture；
(5) dry: by the aluminum alloy base material after sealing of hole in 70 DEG C of dry 4h to get aluminium alloy extrusions.
Embodiment 3
Substantially the same manner as Example 2, difference is only in that, the dosage of ascorbic acid is in step (3) in the present embodiment 3
1.5 part.
Embodiment 4
Substantially the same manner as Example 2, difference is only in that, the dosage of ascorbic acid is 2 in step (3) in the present embodiment 4
Part.
Embodiment 5
Substantially the same manner as Example 2, difference is only in that, the dosage of ascorbic acid is in step (3) in the present embodiment 5
2.5 part.
Embodiment 6
The manufacturing method of aluminium alloy extrusions, comprises the steps of, described part is parts by weight:
(1) degreasing: 130 parts of sulfuric acid are added in 1000 parts of water and are uniformly mixed, ungrease treatment liquid is obtained, is by 4 parts, volume
100cm × 100cm × 5cm aluminum alloy base material is immersed in ungrease treatment liquid, and dipping temperature is 25 DEG C, and dip time is
8min takes out aluminum alloy base material, is rinsed with water clean；
(2) alkali cleaning: 50 parts of sodium hydroxides are added in 1000 parts of water and are uniformly mixed, alkali wash water are obtained, by the aluminium after degreasing
Alloy base material is immersed in alkali wash water, and dipping temperature is 55 DEG C, dip time 3min, is taken out aluminum alloy base material, is rinsed with water
Completely；
(3) 150 parts of sulfuric acid, 1 part of aluminum sulfate, 0.12 part of lanthanum sulfate, 2 parts of ascorbic acid anodic oxidation: are added 1000 parts
It is uniformly mixed in water, obtains oxidation electrolyte, the aluminum alloy base material after alkali cleaning is put into the electrolytic cell equipped with oxidation electrolyte,
Using aluminum alloy base material as anode, using stereotype as cathode, anodic oxidation condition is the temperature of DC voltage 14V, oxidation electrolyte
Degree is 25 DEG C, time 35min, is then rinsed with water the aluminum alloy base material after anodic oxidation completely, aluminium alloy after anodic oxidation
Substrate surface forms oxidation film；
(4) sealing of hole: 200 parts of modifying agent, 0.5 part of hydrochloric acid, 1000 parts of ethyl alcohol are added to be uniformly mixed in 1000 parts of water and be obtained
Then 200 parts of isobutyl triethoxy silanes, 1000 parts of ethyl alcohol are added in 1000 parts of water and are mixed by mixed liquor A
Liquid B is closed, mixed liquid B is added in mixed liquor A, 800rpm, 25 DEG C of stirring 18h obtain colloidal sol, by the aluminium alloy after anodic oxidation
Substrate is immersed in 25 DEG C of colloidal sol, dip time 5min；
(5) dry: by the aluminum alloy base material after sealing of hole in 70 DEG C of dry 4h to get aluminium alloy extrusions.
Step (4) modifying agent is trimethyl phosphate.
Embodiment 7
The manufacturing method of aluminium alloy extrusions, comprises the steps of, described part is parts by weight:
(1) degreasing: 130 parts of sulfuric acid are added in 1000 parts of water and are uniformly mixed, ungrease treatment liquid is obtained, is by 4 parts, volume
100cm × 100cm × 5cm aluminum alloy base material is immersed in ungrease treatment liquid, and dipping temperature is 25 DEG C, and dip time is
8min takes out aluminum alloy base material, is rinsed with water clean；
(2) alkali cleaning: 50 parts of sodium hydroxides are added in 1000 parts of water and are uniformly mixed, alkali wash water are obtained, by the aluminium after degreasing
Alloy base material is immersed in alkali wash water, and dipping temperature is 55 DEG C, dip time 3min, is taken out aluminum alloy base material, is rinsed with water
Completely；
(3) 150 parts of sulfuric acid, 1 part of aluminum sulfate, 0.12 part of lanthanum sulfate, 2 parts of ascorbic acid anodic oxidation: are added 1000 parts
It is uniformly mixed in water, obtains oxidation electrolyte, the aluminum alloy base material after alkali cleaning is put into the electrolytic cell equipped with oxidation electrolyte,
Using aluminum alloy base material as anode, using stereotype as cathode, anodic oxidation condition is the temperature of DC voltage 14V, oxidation electrolyte
Degree is 25 DEG C, time 35min, is then rinsed with water the aluminum alloy base material after anodic oxidation completely, aluminium alloy after anodic oxidation
Substrate surface forms oxidation film；
(4) sealing of hole: 200 parts of modifying agent, 0.5 part of hydrochloric acid, 7 parts of zinc chloride, 1000 parts of ethyl alcohol are added in 1000 parts of water and are mixed
Conjunction uniformly obtains mixed liquor A, and then 200 parts of isobutyl triethoxy silanes, 1000 parts of ethyl alcohol are added in 1000 parts of water and are mixed
Mixed liquid B uniformly is obtained, mixed liquid B is added in mixed liquor A, 800rpm, 25 DEG C of stirring 18h obtain colloidal sol, by anodic oxidation
Aluminum alloy base material afterwards is immersed in 25 DEG C of colloidal sol, dip time 5min；
(5) dry: by the aluminum alloy base material after sealing of hole in 70 DEG C of dry 4h to get aluminium alloy extrusions.
Step (4) modifying agent is trimethyl phosphate.
Embodiment 8
Substantially the same manner as Example 7, difference is only in that, step (4) modifying agent is citric acid three in the present embodiment 8
Butyl ester.
Embodiment 9
Preferably, the modifying agent in the step (4) is trimethyl phosphate and trimethyl citrate, the trimethyl phosphate
Weight part ratio with trimethyl citrate is (1-5): (1-3).
Substantially the same manner as Example 7, difference is only in that, step (4) modifying agent is tripotassium phosphate in the present embodiment 9
The weight part ratio of ester and tributyl citrate, the trimethyl phosphate and tributyl citrate is 4:1.
Electrochemical impedance value test result: electrochemical impedance value is 2.48 × 107Ω/cm2；Crocking resistance test result:
Mass loss rate is 3.2%.
Test case 1
The hardness of the oxidation film on the aluminum alloy base material surface of embodiment preparation is tested.Specific test result is shown in Table 2.
Table 2: aluminum alloy base material surface film oxide micro-hardness testing result table
| Microhardness/HV | |
| Embodiment 1 | 421 |
| Embodiment 2 | 487 |
| Embodiment 3 | 542 |
| Embodiment 4 | 595 |
| Embodiment 5 | 581 |
Comparing embodiment 2-5 and embodiment 1, embodiment 2-5 adds rare-earth salts lanthanum sulfate in oxidation electrolyte, by excellent
The dosage for changing ascorbic acid can improve the microhardness for the oxidation film that aluminum alloy surface is formed, the possible reason is rare-earth salts adds
Enter the surface defect that can reduce oxidation film, keeps tissue finer and close, growth of the coordination ability of ascorbic acid to anode oxide film
Process produces influence.
Test case 2
The corrosion resisting property for the aluminium alloy extrusions that embodiment is prepared is tested.Specific test result is shown in Table 3.
Table 3: the electrochemical impedance value test result table of aluminium alloy extrusions
Comparing embodiment 6 and embodiment 4, embodiment 4 carry out sealing of hole to aluminum alloy surface using hot water, and embodiment 6 uses
Trimethyl phosphate carries out sol-gel technique sealing of hole, the aluminium alloy of embodiment 6 as oxidation film of the modifying agent to aluminum alloy surface
The corrosion resisting property of profile is substantially better than embodiment 4.Comparing embodiment 7 and embodiment 6, inventors be surprised to learn that, embodiment 7 is being made
It joined zinc chloride when standby colloidal sol, the presence of zinc ion can be improved aluminium alloy section surface film layer and make to the blocking of corrosive ions
With the generation of inhibition of corrosion.
Test case 3
Test can be carried out to the rub resistance for the aluminium alloy extrusions that embodiment is prepared.Specific test result is shown in Table 4.
Table 4: the crocking resistance test result table of aluminium alloy extrusions
| Mass loss rate/% | |
| Embodiment 4 | 5.4 |
| Embodiment 6 | 4.8 |
| Embodiment 7 | 4.2 |
| Embodiment 8 | 3.9 |
Compared with Example 4, embodiment 6 can improve the antifriction of aluminium alloy section surface using sol-gel technique sealing of hole
Wipe performance.Zinc chloride is added when embodiment 7 prepares colloidal sol can be further improved the rub resistance on surface.
The above description is only the preferred embodiments of the present invention, not limits the present invention, and appoints
What those skilled in the art is changed to the equivalence enforcement changed on an equal basis possibly also with the technology contents of the disclosure above
Example.Without departing from the concept of the present invention, made to the above embodiment according to the technical essence of the invention any simply to repair
Change or equivalent variations, falls within the scope of protection of the present invention.
Claims (4)
1. a kind of manufacturing method of aluminium alloy extrusions, which is characterized in that comprise the steps of, described part is parts by weight:
(1) degreasing: 100-150 parts of sulfuric acid are added in 1000-2000 parts of water and are uniformly mixed, ungrease treatment liquid are obtained, by 2-10
Part aluminum alloy base material is immersed in ungrease treatment liquid, and dipping temperature is 25-35 DEG C, dip time 5-10min, takes out aluminium alloy
Substrate is rinsed with water clean；
(2) alkali cleaning: 30-80 parts of sodium hydroxides are added in 1000-2000 parts of water and are uniformly mixed, alkali wash water are obtained, after degreasing
Aluminum alloy base material be immersed in alkali wash water, dipping temperature be 55-65 DEG C, dip time 3-5min, take out aluminum alloy base material,
It is rinsed with water clean；
(3) anodic oxidation: 150-250 parts of sulfuric acid, 1-3 parts of aluminum sulfate, 0.05-0.5 parts of lanthanum sulfates, 1-4 parts of ascorbic acid are added
Enter in 1000-2000 parts of water and be uniformly mixed, obtains oxidation electrolyte, the aluminum alloy base material after alkali cleaning is put into equipped with oxidization electrolysis
In the electrolytic cell of liquid, using aluminum alloy base material as anode, using stereotype as cathode, anodic oxidation condition is DC voltage 12-
15V, oxidation electrolyte temperature be 20-30 DEG C, time 35-50min, then the aluminum alloy base material after anodic oxidation is rushed with water
Wash clean, aluminum alloy base material surface forms oxidation film after anodic oxidation；
(4) sealing of hole: 200-250 parts of modifying agent, 0.5-1.5 parts of hydrochloric acid, 5-15 parts of zinc chloride, 1000-1500 parts of ethyl alcohol are added
It is uniformly mixed in 1000-1500 parts of water and obtains mixed liquor A, then by 200-250 parts of isobutyl triethoxy silanes, 1000-
1500 parts of ethyl alcohol, which are added to be uniformly mixed in 1000-1500 parts of water, obtains mixed liquid B, mixed liquid B is added in mixed liquor A, 500-
1000rpm, 20-30 DEG C of stirring 12-24h, obtain colloidal sol, and the aluminum alloy base material after anodic oxidation is immersed in 20-30 DEG C molten
In glue, dip time 5-15min；The modifying agent is trimethyl phosphate and/or tributyl citrate；
(5) dry: by the aluminum alloy base material after sealing of hole in 60-90 DEG C of dry 2-8h to get aluminium alloy extrusions.
2. the manufacturing method of aluminium alloy extrusions as described in claim 1, which is characterized in that aluminium alloy base in the step (5)
The drying temperature of material is 70 DEG C.
3. the manufacturing method of aluminium alloy extrusions as claimed in claim 2, which is characterized in that aluminium alloy base in the step (5)
The drying time of material is 4h.
4. a kind of aluminium alloy extrusions, which is characterized in that be fabricated using any one of claim 1-3 the method.
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| CN108018590B (en) * | 2018-03-19 | 2019-06-25 | 福建奋安铝业有限公司 | A kind of aluminium shape surface treatment process |
| CN109576756A (en) * | 2019-01-21 | 2019-04-05 | 景德镇市宏亿电子科技有限公司 | A kind of aluminium base board machining process |
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