CN108360038A - Anticorrosion aluminium ally section and preparation method thereof - Google Patents
Anticorrosion aluminium ally section and preparation method thereof Download PDFInfo
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- C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
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- 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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- 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
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- 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
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Abstract
The invention discloses a kind of anticorrosion aluminium ally section and preparation method thereof, the preparation method of the anticorrosion aluminium ally section includes the following steps：(1) oil removing；(2) alkaline etching；(3) it neutralizes；(4) anodic oxidation；(5) sealing of hole.Anticorrosion aluminium ally section of the present invention and preparation method thereof, pass through anodic oxidation, fine and close oxidation film is formed on alloy matrix aluminum, microhardness, wearability and the corrosion resistance and good of obtained anticorrosion aluminium ally section, can be applied to the every field such as electronics, electric power, aviation, chemical industry, building materials, traffic.
Description
Technical field
The present invention relates to technical field of metal material, and in particular to a kind of anticorrosion aluminium ally section and preparation method thereof.
Background technology
Aluminium is silvery white non-ferrous metal, and density 2.70, fusing point is 657 DEG C.Aluminium and its alloy material are due to its high intensity/weight
Amount ratio, it is easily molded process and excellent physics, chemical property, in many such as electronics, electric power, aviation, chemical industry, building materials, traffic
In industrial department and daily life, it is widely used.
Aluminum alloy materials hardness is low, wears no resistance, and erosion corrosion often occurs, and appearance gloss cannot keep permanent.It summarizes
Come, the common Corrosion Types of aluminium alloy mainly have：It spot corrosion, intercrystalline corrosion, stress corrosion, contact corrosion and degrades.In order to improve
Its resistance to corrosion enhances its surface decoration effect, extends its service life, and aluminium alloy goes to corresponding toward that need to pass through in use
Surface treatment.
The surface treatment method of aluminium alloy can substantially be divided into oxidation, plating and coating etc..And the anodic oxygen in aoxidizing
Change and chemical oxidation is presently the most common surface treatment method.However, aluminium alloy is in the single electricity such as sulfuric acid, phosphoric acid, oxalic acid
The microhardness of the anode oxide film prepared in solution liquid is generally relatively low, and wearability and corrosion resistance are poor, comprehensive mechanical property
It is not high, it cannot be satisfied industrial requirement.Therefore it needs to explore a kind of preparation method of anticorrosion aluminium, improves aluminium alloy
Microhardness, wearability and corrosion resistance.
Invention content
Aiming at the above shortcomings existing in the prior art, technical problem to be solved by the invention is to provide a kind of corrosion-resistant
Aluminium alloy extrusions and preparation method thereof, anticorrosion aluminium ally section microhardness is high, wearability and corrosion resistance and good.
Purpose of the present invention is to what is be achieved through the following technical solutions：
A kind of preparation method of anticorrosion aluminium ally section, includes the following steps：
(1) oil removing；
(2) alkaline etching；
(3) it neutralizes；
(4) anodic oxidation；
(5) sealing of hole.
Preferably, the preparation method of the anticorrosion aluminium ally section, includes the following steps：
(1) oil removing：By alloy matrix aluminum in 15-20 DEG C, the sulfuric acid solution of a concentration of 100-140g/L 3-5 points of dipping
Clock takes out, is eluted with water；
(2) alkaline etching：In temperature it is 35-45 DEG C, the hydrogen-oxygen of a concentration of 30-50g/L by the alloy matrix aluminum of step (1) processing
Change and impregnated 3-5 minutes in sodium solution, takes out, be eluted with water；
(3) it neutralizes：By the alloy matrix aluminum of step (2) processing in 15-20 DEG C, the sulfuric acid solution of a concentration of 100-140g/L
Middle dipping 2-4 minutes takes out, is eluted with water；
(4) anodic oxidation：The alloy matrix aluminum of step (3) processing is subjected to anodic oxidation in the electrolytic solution, aluminium alloy is
Anode, aluminium sheet are cathode, and wherein oxidation voltage is 15-20V, current density 1-2A/dm2, electrolyte temperature is 15-20 DEG C,
Oxidization time 20-40 minutes；
(5) sealing of hole：The alloy matrix aluminum of step (4) processing is impregnated 15-30 minutes in 85-95 DEG C of pore-sealing liquid, is taken
Go out to drain surface moisture, it is 2-4 hours dry at 80-90 DEG C, obtain anticorrosion aluminium ally section.
The electrolyte is prepared by following methods, and described part is parts by weight：By 10-20 parts of sulfuric acid, organic acid 2-5
Part, 0.1-0.3 parts of polyalcohol are added in 100 parts of water, are stirred 5-10 minutes with 100-300 revs/min, are obtained electrolyte.
Preferably, the electrolyte is prepared by following methods, and described part is parts by weight：By 10-20 parts of sulfuric acid, have
2-5 parts of machine acid, 0.1-0.3 parts of polyalcohol are added in 100 parts of water, are stirred 5-10 minutes with 100-300 revs/min, are added nitrogen
Change 0.05-0.5 parts of boron, is stirred 20-30 minutes with 100-300 revs/min, obtain electrolyte.
The pore-sealing liquid is prepared by following methods, and described part is parts by weight：By 100 parts of 1-2 parts of cerous nitrate and water
Mixing is stirred 10-20 minutes with 100-300 revs/min, obtains pore-sealing liquid.
Preferably, the organic acid is modified salicylic acid and/or gallic acid.
It is highly preferred that the organic acid is the mixture of modified salicylic acid and gallic acid, the modified salicylic acid and do not have
The mass ratio of gallate-based is 1：(3-5).
The polyalcohol is one kind in glycerine, isopropanol, pentaerythrite.
Preferably, the polyalcohol is pentaerythrite.
The modified salicylic acid is prepared by following methods, and described part is parts by weight：
(1) 1-3 parts of chitosan oligosaccharides and 80-120 parts of water are mixed, obtains chitosan oligosaccharide aqueous solution, be 10% with mass fraction
Sodium hydrate aqueous solution adjust chitosan oligosaccharide aqueous solution pH value be 7.5-8.5, add 1-2 parts of salicylic acids, 60-70 DEG C with
100-300 revs/min is stirred 80-120 minutes, and reaction product is obtained；
(2) reaction product in vacuum degree is 0.05-0.2MPa by 100 revs/min of setting Rotary Evaporators rotating speed, and temperature is
60-70 DEG C of rotary evaporation obtains solid to no moisture；
(3) by solid and ethyl alcohol in mass ratio 1：(80-100) is mixed, at 15-25 DEG C with 100-300 revs/min of stirring 10-
20 minutes, then centrifuged 8-12 minutes with 3000-5000 revs/min, what is obtained is deposited in 60-70 DEG C of drying to constant weight, is modified
Salicylic acid.
A kind of anticorrosion aluminium ally section, is prepared using the above method.
Anticorrosion aluminium ally section of the present invention and preparation method thereof is formed on alloy matrix aluminum and is caused by anodic oxidation
Close oxidation film, microhardness, wearability and the corrosion resistance and good of obtained anticorrosion aluminium ally section, can be applied to electricity
The every field such as son, electric power, aviation, chemical industry, building materials, traffic.
Specific implementation mode
In the present invention, if not refering in particular to, all devices and raw material is commercially available or the industry is common are following
Method in embodiment is unless otherwise instructed this field conventional method.
The micro-hardness testing of oxidation film：Using FischerHM2000 types microhardness tester (German Fei Xier test equipments
Co., Ltd produces) Vickers hardness of test oxidation film, load 500mN, load time 20s, the number of parallel sample is 3
A, each parallel sample is chosen 10 equally distributed different test points and is measured, and the microhardness for sample is averaged.
The wearability of oxidation film is studied using friction wear testing machine (CSEM companies of Switzerland produce, model THT07-135),
It is 25 DEG C of tests, the ZrO that friction bead is diameter 6mm in temperature2Ceramic wear-resisting ball, friction velocity 4cm/s, load 5N,
Friction length is 8mm, and to avoid single from rubbing, revolution is excessive causes anode oxide film worn out and total friction revolution is very few makes
Be unable to measure very little at wear extent, all samples rub 2 times 350 turns, record friction test before and after quality, as follows
Calculate mass loss rate：[(m1-m2)/m1] × 100%, wherein m1For the quality of aluminium alloy extrusions before friction test, m2For friction
The quality of aluminium alloy extrusions after experiment.
Corrosion resistance is tested：With reference to Tian Lianpeng, left Yu etc.《Aluminium alloy anode oxide film Nickel acetate sealing method rotproofness is ground
Study carefully》, corrosion and protection, 2006.27 (2), 2.4 section in method tested, it is specific as follows：Using three-electrode system, with full
It is reference electrode with calomel electrode, platinum electrode is auxiliary electrode, and test oxidation film is in acid (pH=3.0) solution of 1mol/LNaCl
In ac impedance spectroscopy (test signal be amplitude 10mV sine wave, the frequency of measurement is by 100kHz to 0.01Hz, test software
For Powersine) evaluate the corrosion resisting property of oxidation film.PH value, test temperature are adjusted by the way that hydrochloric acid is added into NaCl solution
Degree is 20 DEG C.Concrete outcome evaluates the corrosion resistance of oxidation film with frequency for the impedance value of 100HZ.
Sulfuric acid wins the concentrated sulfuric acid for the purity 98wt% that chemical industry has company to produce using Tianjin enlightening.
Sodium hydroxide, forever scientific and technological (Jiangsu) Co., Ltd production of China's chemistry.
Boron nitride uses the article No. that Qinghe County Bo Zuan metal materials Co., Ltd produces for NO-N-003-1DE boron nitride,
Average grain diameter 100nm.
Cerous nitrate, No. CAS：13093-17-9, Shanghai ShuaiSun Industrial Co., Ltd.s provide.
Salicylic acid, Shanghai Mike's woods biochemical technology Co., Ltd provide, product identification：S817529.
Gallic acid, No. CAS：149-91-7, the Zhangjiajie bio tech ltd Jiu Rui provide.
Pentaerythrite, Shanghai Mike's woods biochemical technology Co., Ltd provide, product identification：P815603.
Glycerine, Shanghai Mike's woods biochemical technology Co., Ltd provide, product identification：G6201.
Isopropanol, Shanghai Mike's woods biochemical technology Co., Ltd provide, product identification：I811924.
Chitosan oligosaccharide, the production of Shaanxi Sen Lang biochemical industries Co., Ltd, molecular weight 2000, deacetylation 90.5%.
Ethyl alcohol, the absolute ethyl alcohol of use scientific and technological (Jiangsu) Co., Ltd production of China's chemistry forever.
Aluminum alloy base material, it is 50mm × 50mm × 1mm, 2024 aluminium alloyings that 2024 aluminium alloys, volume are used in embodiment
Component is learned to see the table below：
1 2024 aluminum alloy chemically component of table
| Element | Si | Fe | Cu | Mn | Mg | Zn | Ni | Cr | Al |
| Mass fraction, % | 0.5 | 0.5 | 4.5 | 0.53 | 1.4 | 0.3 | 0.1 | 0 | Surplus |
Embodiment 1
A kind of preparation method of anticorrosion aluminium ally section, includes the following steps：
(1) oil removing：Alloy matrix aluminum is impregnated 4 minutes in 18 DEG C, the sulfuric acid solution of a concentration of 120g/L, takes out, uses
Water is cleaned；
(2) alkaline etching：By step (1) processing alloy matrix aluminum temperature be 40 DEG C, the sodium hydroxide of a concentration of 40g/L it is molten
It is impregnated 4 minutes in liquid, takes out, be eluted with water；
(3) it neutralizes：The alloy matrix aluminum of step (2) processing is impregnated 3 in 18 DEG C, the sulfuric acid solution of a concentration of 120g/L
Minute, it takes out, is eluted with water；
(4) anodic oxidation：The alloy matrix aluminum of step (3) processing is subjected to anodic oxidation in the electrolytic solution, aluminium alloy is
Anode, aluminium sheet are cathode, and wherein oxidation voltage is 18V, current density 1.5A/dm2, electrolyte temperature is 18 DEG C, when oxidation
Between 30 minutes；
(5) sealing of hole：The alloy matrix aluminum of step (4) processing is impregnated 20 minutes in 90 DEG C of pore-sealing liquid, taking-up drains
Surface moisture, it is 3 hours dry at 85 DEG C, obtain anticorrosion aluminium ally section.
The electrolyte is prepared by following methods, and described part is parts by weight：By 15 parts of sulfuric acid, 3 parts of organic acid, more
0.2 part of first alcohol is added in 100 parts of water, is stirred 8 minutes with 200 revs/min, is obtained electrolyte.
The pore-sealing liquid is prepared by following methods, and described part is parts by weight：By 100 parts of 1.5 parts of cerous nitrate and water
Mixing is stirred 15 minutes with 200 revs/min, obtains pore-sealing liquid.
The polyalcohol is glycerine.
The organic acid is modified salicylic acid, and the modified salicylic acid is prepared by following methods, and described part is attached most importance to
Measure part：
(1) 2 parts of chitosan oligosaccharides and 100 parts of water are mixed, obtains chitosan oligosaccharide aqueous solution, the hydroxide for being 10% with mass fraction
The pH value that sodium water solution adjusts chitosan oligosaccharide aqueous solution is 8.0, adds 1.5 parts of salicylic acids, at 65 DEG C with 200 revs/min of stirrings 100
Minute, obtain reaction product；
(2) reaction product in vacuum degree is 0.1MPa by 100 revs/min of setting Rotary Evaporators rotating speed, and temperature is 65 DEG C of rotations
Turn to be evaporated to no moisture, obtains solid；
(3) by solid and ethyl alcohol in mass ratio 1：90 mixing are stirred 15 minutes at 20 DEG C with 200 revs/min, then with 4000
Rev/min centrifugation 10 minutes, what is obtained is deposited in 65 DEG C of dryings to constant weight, obtains modified salicylic acid.
Embodiment 2
A kind of preparation method of anticorrosion aluminium ally section, includes the following steps：
(1) oil removing：Alloy matrix aluminum is impregnated 4 minutes in 18 DEG C, the sulfuric acid solution of a concentration of 120g/L, takes out, uses
Water is cleaned；
(2) alkaline etching：By step (1) processing alloy matrix aluminum temperature be 40 DEG C, the sodium hydroxide of a concentration of 40g/L it is molten
It is impregnated 4 minutes in liquid, takes out, be eluted with water；
(3) it neutralizes：The alloy matrix aluminum of step (2) processing is impregnated 3 in 18 DEG C, the sulfuric acid solution of a concentration of 120g/L
Minute, it takes out, is eluted with water；
(4) anodic oxidation：The alloy matrix aluminum of step (3) processing is subjected to anodic oxidation in the electrolytic solution, aluminium alloy is
Anode, aluminium sheet are cathode, and wherein oxidation voltage is 18V, current density 1.5A/dm2, electrolyte temperature is 18 DEG C, when oxidation
Between 30 minutes；
(5) sealing of hole：The alloy matrix aluminum of step (4) processing is impregnated 20 minutes in 90 DEG C of pore-sealing liquid, taking-up drains
Surface moisture, it is 3 hours dry at 85 DEG C, obtain anticorrosion aluminium ally section.
The electrolyte is prepared by following methods, and described part is parts by weight：By 15 parts of sulfuric acid, 3 parts of organic acid, more
0.2 part of first alcohol is added in 100 parts of water, is stirred 8 minutes with 200 revs/min, is added 0.1 part of boron nitride, is stirred with 200 revs/min
25 minutes, obtain electrolyte.
The pore-sealing liquid is prepared by following methods, and described part is parts by weight：By 100 parts of 1.5 parts of cerous nitrate and water
Mixing is stirred 15 minutes with 200 revs/min, obtains pore-sealing liquid.
The polyalcohol is glycerine.
The organic acid is modified salicylic acid, and the modified salicylic acid is prepared by following methods, and described part is attached most importance to
Measure part：
(1) 2 parts of chitosan oligosaccharides and 100 parts of water are mixed, obtains chitosan oligosaccharide aqueous solution, the hydroxide for being 10% with mass fraction
The pH value that sodium water solution adjusts chitosan oligosaccharide aqueous solution is 8.0, adds 1.5 parts of salicylic acids, at 65 DEG C with 200 revs/min of stirrings 100
Minute, obtain reaction product；
(2) reaction product in vacuum degree is 0.1MPa by 100 revs/min of setting Rotary Evaporators rotating speed, and temperature is 65 DEG C of rotations
Turn to be evaporated to no moisture, obtains solid；
(3) by solid and ethyl alcohol in mass ratio 1：90 mixing are stirred 15 minutes at 20 DEG C with 200 revs/min, then with 4000
Rev/min centrifugation 10 minutes, what is obtained is deposited in 65 DEG C of dryings to constant weight, obtains modified salicylic acid.
Embodiment 3
It is substantially the same manner as Example 2, it differs only in, the polyalcohol is isopropanol.
Embodiment 4
It is substantially the same manner as Example 2, it differs only in：The polyalcohol is pentaerythrite.
Comparative example 1
A kind of preparation method of anticorrosion aluminium ally section, includes the following steps：
(1) oil removing：Alloy matrix aluminum is impregnated 4 minutes in 18 DEG C, the sulfuric acid solution of a concentration of 120g/L, takes out, uses
Water is cleaned；
(2) alkaline etching：By step (1) processing alloy matrix aluminum temperature be 40 DEG C, the sodium hydroxide of a concentration of 40g/L it is molten
It is impregnated 4 minutes in liquid, takes out, be eluted with water；
(3) it neutralizes：The alloy matrix aluminum of step (2) processing is impregnated 3 in 18 DEG C, the sulfuric acid solution of a concentration of 120g/L
Minute, it takes out, is eluted with water；
(4) anodic oxidation：The alloy matrix aluminum of step (3) processing is subjected to anodic oxidation in the electrolytic solution, aluminium alloy is
Anode, aluminium sheet are cathode, and wherein oxidation voltage is 18V, current density 1.5A/dm2, electrolyte temperature is 18 DEG C, when oxidation
Between 30 minutes；
(5) sealing of hole：The alloy matrix aluminum of step (4) processing is impregnated 20 minutes in 90 DEG C of pore-sealing liquid, taking-up drains
Surface moisture, it is 3 hours dry at 85 DEG C, obtain anticorrosion aluminium ally section.
The electrolyte is prepared by following methods, and described part is parts by weight：By 15 parts of sulfuric acid, 3 parts of organic acid, more
0.2 part of first alcohol is added in 100 parts of water, is stirred 8 minutes with 200 revs/min, is added 0.1 part of boron nitride, is stirred with 200 revs/min
25 minutes, obtain electrolyte.
The pore-sealing liquid is prepared by following methods, and described part is parts by weight：By 100 parts of 1.5 parts of cerous nitrate and water
Mixing is stirred 15 minutes with 200 revs/min, obtains pore-sealing liquid.
The polyalcohol is pentaerythrite.
The organic acid is salicylic acid.
Embodiment 5
A kind of preparation method of anticorrosion aluminium ally section, includes the following steps：
(1) oil removing：Alloy matrix aluminum is impregnated 4 minutes in 18 DEG C, the sulfuric acid solution of a concentration of 120g/L, takes out, uses
Water is cleaned；
(2) alkaline etching：By step (1) processing alloy matrix aluminum temperature be 40 DEG C, the sodium hydroxide of a concentration of 40g/L it is molten
It is impregnated 4 minutes in liquid, takes out, be eluted with water；
(3) it neutralizes：The alloy matrix aluminum of step (2) processing is impregnated 3 in 18 DEG C, the sulfuric acid solution of a concentration of 120g/L
Minute, it takes out, is eluted with water；
(4) anodic oxidation：The alloy matrix aluminum of step (3) processing is subjected to anodic oxidation in the electrolytic solution, aluminium alloy is
Anode, aluminium sheet are cathode, and wherein oxidation voltage is 18V, current density 1.5A/dm2, electrolyte temperature is 18 DEG C, when oxidation
Between 30 minutes；
(5) sealing of hole：The alloy matrix aluminum of step (4) processing is impregnated 20 minutes in 90 DEG C of pore-sealing liquid, taking-up drains
Surface moisture, it is 3 hours dry at 85 DEG C, obtain anticorrosion aluminium ally section.
The electrolyte is prepared by following methods, and described part is parts by weight：By 15 parts of sulfuric acid, 3 parts of organic acid, more
0.2 part of first alcohol is added in 100 parts of water, is stirred 8 minutes with 200 revs/min, is added 0.1 part of boron nitride, is stirred with 200 revs/min
25 minutes, obtain electrolyte.
The pore-sealing liquid is prepared by following methods, and described part is parts by weight：By 100 parts of 1.5 parts of cerous nitrate and water
Mixing is stirred 15 minutes with 200 revs/min, obtains pore-sealing liquid.
The polyalcohol is pentaerythrite.
The organic acid is gallic acid.
Obtain the microhardness 517Hv of anticorrosion aluminium ally section, mass loss rate 4.13%, impedance value 1.74 × 106
Ω/cm2。
Embodiment 6
A kind of preparation method of anticorrosion aluminium ally section, includes the following steps：
(1) oil removing：Alloy matrix aluminum is impregnated 4 minutes in 18 DEG C, the sulfuric acid solution of a concentration of 120g/L, takes out, uses
Water is cleaned；
(2) alkaline etching：By step (1) processing alloy matrix aluminum temperature be 40 DEG C, the sodium hydroxide of a concentration of 40g/L it is molten
It is impregnated 4 minutes in liquid, takes out, be eluted with water；
(3) it neutralizes：The alloy matrix aluminum of step (2) processing is impregnated 3 in 18 DEG C, the sulfuric acid solution of a concentration of 120g/L
Minute, it takes out, is eluted with water；
(4) anodic oxidation：The alloy matrix aluminum of step (3) processing is subjected to anodic oxidation in the electrolytic solution, aluminium alloy is
Anode, aluminium sheet are cathode, and wherein oxidation voltage is 18V, current density 1.5A/dm2, electrolyte temperature is 18 DEG C, when oxidation
Between 30 minutes；
(5) sealing of hole：The alloy matrix aluminum of step (4) processing is impregnated 20 minutes in 90 DEG C of pore-sealing liquid, taking-up drains
Surface moisture, it is 3 hours dry at 85 DEG C, obtain anticorrosion aluminium ally section.
The electrolyte is prepared by following methods, and described part is parts by weight：By 15 parts of sulfuric acid, 3 parts of organic acid, more
0.2 part of first alcohol is added in 100 parts of water, is stirred 8 minutes with 200 revs/min, is added 0.1 part of boron nitride, is stirred with 200 revs/min
25 minutes, obtain electrolyte.
The pore-sealing liquid is prepared by following methods, and described part is parts by weight：By 100 parts of 1.5 parts of cerous nitrate and water
Mixing is stirred 15 minutes with 200 revs/min, obtains pore-sealing liquid.
The organic acid is the mixture of modified salicylic acid and gallic acid, the matter of the modified salicylic acid and gallic acid
Amount is than being 1：4.
The polyalcohol is pentaerythrite.
The modified salicylic acid is prepared by following methods, and described part is parts by weight：
(1) 2 parts of chitosan oligosaccharides and 100 parts of water are mixed, obtains chitosan oligosaccharide aqueous solution, the hydroxide for being 10% with mass fraction
The pH value that sodium water solution adjusts chitosan oligosaccharide aqueous solution is 8.0, adds 1.5 parts of salicylic acids, at 65 DEG C with 200 revs/min of stirrings 100
Minute, obtain reaction product；
(2) reaction product in vacuum degree is 0.1MPa by 100 revs/min of setting Rotary Evaporators rotating speed, and temperature is 65 DEG C of rotations
Turn to be evaporated to no moisture, obtains solid；
(3) by solid and ethyl alcohol in mass ratio 1：90 mixing are stirred 15 minutes at 20 DEG C with 200 revs/min, then with 4000
Rev/min centrifugation 10 minutes, what is obtained is deposited in 65 DEG C of dryings to constant weight, obtains modified salicylic acid.
Obtain the microhardness 601Hv of anticorrosion aluminium ally section, mass loss rate 3.46%, impedance value 2.41 × 106
Ω/cm2。
Test case 1
The microhardness of the obtained anticorrosion aluminium ally section of embodiment 1-4 and comparative example 1 is tested, it is specific to test
It the results are shown in Table 2.
2 anticorrosion aluminium ally section micro-hardness testing result table of table
| Microhardness, Hv | |
| Embodiment 1 | 395 |
| Embodiment 2 | 459 |
| Embodiment 3 | 467 |
| Embodiment 4 | 528 |
| Comparative example 1 | 482 |
Test case 2
The wearability of the obtained anticorrosion aluminium ally section of embodiment 1-4 and comparative example 1 is tested, specific test knot
Fruit is shown in Table 3.
3 anticorrosion aluminium ally section wearability test result table of table
| Mass loss rate, % | |
| Embodiment 1 | 5.24 |
| Embodiment 2 | 4.67 |
| Embodiment 3 | 4.55 |
| Embodiment 4 | 4.03 |
| Comparative example 1 | 4.21 |
Test case 3
The corrosion resistance of the obtained anticorrosion aluminium ally section of embodiment 1-4 and comparative example 1 is tested, it is specific to test
It the results are shown in Table 4.
4 anticorrosion aluminium ally section corrosion resistance test result table of table
| Impedance value, Ω/cm2 | |
| Embodiment 1 | 9.24×105 |
| Embodiment 2 | 1.06×106 |
| Embodiment 3 | 1.18×106 |
| Embodiment 4 | 1.87×106 |
| Comparative example 1 | 1.62×106 |
Inorganic particle silicon nitride is added in embodiment 2 in the electrolytic solution, is remarkably improved the performance of oxidation film.
Different polyalcohols is respectively adopted in embodiment 2-4 electrolyte, finds the oxygen that embodiment 4 is obtained using pentaerythrite
Change the better performances of film.This is because polyalcohol can reduce solution rate of the electrolyte to film, while improving the temperature of permission
Range, and the speed of growth of film can be accelerated, increase the consistency and thickness of film, shadow of the different polyalcohols to anodic oxidation
It rings different.Embodiment 4 is using modified salicylic acid, and the performance of obtained oxidation film is better than comparative example 1, it may be possible to modified water
Poplar acid molecular structures are changed, and the organo-functional group being grafted on molecule is more advantageous to the performance for promoting oxidation film.
Claims (10)
1. a kind of preparation method of anticorrosion aluminium ally section, which is characterized in that include the following steps：
(1) oil removing；
(2) alkaline etching；
(3) it neutralizes；
(4) anodic oxidation；
(5) sealing of hole.
2. the preparation method of anticorrosion aluminium ally section as described in claim 1, which is characterized in that include the following steps：
(1) oil removing：Alloy matrix aluminum is impregnated 3-5 minutes in 15-20 DEG C, the sulfuric acid solution of a concentration of 100-140g/L, is taken
Go out, is eluted with water；
(2) alkaline etching：In temperature it is 35-45 DEG C, the sodium hydroxide of a concentration of 30-50g/L by the alloy matrix aluminum of step (1) processing
It is impregnated 3-5 minutes in solution, takes out, be eluted with water；
(3) it neutralizes：The alloy matrix aluminum of step (2) processing is soaked in 15-20 DEG C, the sulfuric acid solution of a concentration of 100-140g/L
Stain 2-4 minutes is taken out, is eluted with water；
(4) anodic oxidation：The alloy matrix aluminum of step (3) processing is subjected to anodic oxidation in the electrolytic solution, aluminium alloy is anode,
Aluminium sheet is cathode, and wherein oxidation voltage is 15-20V, current density 1-2A/dm2, electrolyte temperature is 15-20 DEG C, when oxidation
Between 20-40 minutes；
(5) sealing of hole：The alloy matrix aluminum of step (4) processing is impregnated 15-30 minutes in 85-95 DEG C of pore-sealing liquid, takes out drip
Dry surface moisture, it is 2-4 hours dry at 80-90 DEG C, obtain anticorrosion aluminium ally section.
3. the preparation method of anticorrosion aluminium ally section as claimed in claim 2, which is characterized in that the electrolyte is by following
Method is prepared, and described part is parts by weight：10-20 parts of sulfuric acid, 2-5 parts of organic acid, 0.1-0.3 parts of polyalcohol are added to
In 100 parts of water, is stirred 5-10 minutes with 100-300 revs/min, obtain electrolyte.
4. the preparation method of anticorrosion aluminium ally section as claimed in claim 2, which is characterized in that the electrolyte is by following
Method is prepared, and described part is parts by weight：10-20 parts of sulfuric acid, 2-5 parts of organic acid, 0.1-0.3 parts of polyalcohol are added to
In 100 parts of water, is stirred 5-10 minutes with 100-300 revs/min, add 0.05-0.5 parts of boron nitride, stirred with 100-300 revs/min
It mixes 20-30 minutes, obtains electrolyte.
5. the preparation method of anticorrosion aluminium ally section as claimed in claim 2, which is characterized in that the pore-sealing liquid is by following
Method is prepared, and described part is parts by weight：By the 100 parts of mixing of 1-2 parts of cerous nitrate and water, stirred with 100-300 revs/min
10-20 minutes, obtain pore-sealing liquid.
6. the preparation method of anticorrosion aluminium ally section as described in claim 3 or 4, which is characterized in that the polyalcohol is
One kind in glycerine, isopropanol, pentaerythrite.
7. the preparation method of anticorrosion aluminium ally section as claimed in claim 6, which is characterized in that the polyalcohol is season penta
Tetrol.
8. the preparation method of anticorrosion aluminium ally section as described in claim 3 or 4, which is characterized in that the organic acid is
Modified salicylic acid and/or gallic acid.
9. the preparation method of anticorrosion aluminium ally section as claimed in claim 8, which is characterized in that the modified salicylic acid by
Following methods are prepared, and described part is parts by weight：
(1) 1-3 parts of chitosan oligosaccharides and 80-120 parts of water are mixed, obtains chitosan oligosaccharide aqueous solution, the hydrogen-oxygen for being 10% with mass fraction
It is 7.5-8.5 to change sodium water solution to adjust the pH value of chitosan oligosaccharide aqueous solution, 1-2 parts of salicylic acids is added, at 60-70 DEG C with 100-
300 revs/min are stirred 80-120 minutes, and reaction product is obtained；
(2) reaction product in vacuum degree is 0.05-0.2MPa, temperature 60-70 by 100 revs/min of setting Rotary Evaporators rotating speed
DEG C rotary evaporation obtains solid to no moisture；
(3) by solid and ethyl alcohol in mass ratio 1：(80-100) is mixed, at 15-25 DEG C with 100-300 revs/min of 10-20 points of stirring
Clock, then centrifuged 8-12 minutes with 3000-5000 revs/min, what is obtained is deposited in 60-70 DEG C of drying to constant weight, obtains modified bigcatkin willow
Acid.
10. a kind of anticorrosion aluminium ally section, which is characterized in that be prepared using any one of claim 1-9 methods.
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| CN109536793A (en) * | 2018-11-21 | 2019-03-29 | 安徽鑫铂铝业股份有限公司 | A kind of alkaline-resisting antioxidation aluminium profile |
| CN110079847A (en) * | 2019-05-27 | 2019-08-02 | 辽宁忠旺集团有限公司 | A kind of method of efficient and environment-friendly type removal aluminium alloy sode ash |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101575725A (en) * | 2009-05-26 | 2009-11-11 | 嘉兴中科亚美合金技术有限责任公司 | Additive, solution and technology used for hard anodic oxidation of high-silicon aluminum alloy |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101575725A (en) * | 2009-05-26 | 2009-11-11 | 嘉兴中科亚美合金技术有限责任公司 | Additive, solution and technology used for hard anodic oxidation of high-silicon aluminum alloy |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109536793A (en) * | 2018-11-21 | 2019-03-29 | 安徽鑫铂铝业股份有限公司 | A kind of alkaline-resisting antioxidation aluminium profile |
| CN110079847A (en) * | 2019-05-27 | 2019-08-02 | 辽宁忠旺集团有限公司 | A kind of method of efficient and environment-friendly type removal aluminium alloy sode ash |
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