CN108138351A - White aluminum component and preparation method thereof - Google Patents
White aluminum component and preparation method thereof Download PDFInfo
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- CN108138351A CN108138351A CN201780001142.1A CN201780001142A CN108138351A CN 108138351 A CN108138351 A CN 108138351A CN 201780001142 A CN201780001142 A CN 201780001142A CN 108138351 A CN108138351 A CN 108138351A
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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
- C25D13/00—Electrophoretic coating characterised by the process
- C25D13/04—Electrophoretic coating characterised by the process with organic material
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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
- C25D13/00—Electrophoretic coating characterised by the process
- C25D13/20—Pretreatment
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25F—PROCESSES FOR THE ELECTROLYTIC REMOVAL OF MATERIALS FROM OBJECTS; APPARATUS THEREFOR
- C25F3/00—Electrolytic etching or polishing
- C25F3/02—Etching
- C25F3/04—Etching of light metals
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Abstract
White aluminum component preparation method includes the following steps：Surface micro etch processing is carried out to aluminum component, electric coloring treatment is carried out to aluminum component, the white film is carried out dehydrating and drying and processing.The aluminium workpiece surface that the preparation method of white aluminum component is handled the electrolysis of color white slurry to surface using electric colouring through micro etch, so that aluminium workpiece surface forms bloom white film, and thicknesses of layers is low so that aluminum component has good metal-like, and white film and aluminium workpiece surface bond strength are high.In addition, preparation method technique is easily-controllable, product quality is stablized, and effectively increases production efficiency, reduces production cost.
Description
Technical field
The invention belongs to field of material technology, specifically a kind of white aluminum component and preparation method thereof.
Background technology
With the development of world's electronic product and the development of other demand light material industry such as aircraft industries, product is towards light
Thin direction extension.Therefore, it is increasing to the demand of light material, but also to the related mechanical properties requirement of respective material
Come higher.Wherein, aluminium and its alloy be since its is light, and is able to good mechanical performance extensively to send out application.
While the frivolous and mechanical property requirements of product are continuously improved in consumer, develop as customer profile consumes
Under trend, consume and also have diversified requirement to the color of product.Wherein, white is one of public color all liked, but
The white of current aluminum metal product realizes to be typically all to be sprayed into white using metal or plastic cement, and such appearance is not scratch-resistant
Wound, and without good texture.
Such as the aluminium phone housing that Vehicles Collected from Market consumption figure is bigger, the phone housing handled using anodic oxidation of aluminiun materials
It is main product at present on the market, that is to say aluminium and its alloy under corresponding electrolyte and specific process conditions, due to
Under the action of impressed current, the process of layer oxide film is formed on aluminum products (anode).But current anodic oxidation of aluminiun materials dye
Material is without white, i.e., current anodized can not form the oxidation film layer of white, so can not using traditional anode+dyeing
Realize white film.
In order to realize white, if aluminium phone housing realizes white, currently the majority is realized by the method for spray painting.But
The product film thickness of spray painting is at least 20-30 μm, and texture is completely as resin, therefore, reduces aluminium product such as aluminium mobile phone
The metal-like of shell.
Technical problem
It is an object of the invention to overcome the above-mentioned deficiency of the prior art, a kind of white aluminum component and preparation method thereof is provided,
After solving existing aluminum component white coating, the technical issues of metal-like is poor or anodic oxidation can not form white film.
Technical solution
In order to achieve the above-mentioned object of the invention, an aspect of of the present present invention provides a kind of preparation method of white aluminum component, including
Following steps：
Aluminum component is subjected to surface micro etch processing, etches to form micropore in the aluminium workpiece surface；
The electric coloring treatment of aluminum component progress for being formed with micropore will be etched, white film is formed in aluminium workpiece surface；
The white film is carried out dehydrating and drying and processing；
Wherein, the electrolyte of the electric coloring treatment is color white slurry, including water, paint and white slurry；And
The mass ratio of the water, paint and white slurry is (12-13):(2-3):(1-1.2).
On the other hand, the present invention provides a kind of white aluminum components.The white aluminum component includes aluminum component ontology, the aluminum component sheet
Body surface face is etched with several micropores, and electricity, which colours, at least in the micropore white film；Wherein, the white film is formed
Color white slurry includes water, paint and white slurry；And the mass ratio of the water, paint and white slurry is (12-13):
(2-3):(1-1.2)。
Advantageous effect
Compared with prior art, the preparation method of above-mentioned white aluminum component is arrived the electrolysis of color white slurry using electric colouring
The aluminium workpiece surface that surface is handled through micro etch so that aluminium workpiece surface forms bloom white film.Also effect reduces film layer simultaneously
Thickness, so that aluminum component has good metal-like, and white film and aluminium workpiece surface bond strength are high.In addition, it is made
Preparation Method technique is easily-controllable, and product quality is stablized, and effectively increases production efficiency, reduces production cost.
Above-mentioned white aluminum component powers on coloring white film on the surface that surface etch has micropore, white so as to assign film layer bloom
Color, and film layer and aluminium workpiece surface bond strength are high.In addition, white film is thin, assign above-mentioned white aluminum component good metallic
Sense, effectively increases the quality of aluminum component, improves its market competitiveness.
Description of the drawings
Fig. 1 is white aluminum component preparation method flow chart of the invention；
Fig. 2 is that aluminum component of the present invention carries out surface micro etch process flow figure.
Embodiments of the present invention
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to embodiments, to the present invention
It is described in further detail.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not used to limit
The fixed present invention.
The mass percent of each component noted in the disclosure of the embodiment of the present invention can be not only represented between each component
The proportionate relationship of quality can also refer to the concrete content of each component, therefore, as long as according in specification of the embodiment of the present invention
The content of pharmaceutical composition each component is scaled up or is reduced within specification of embodiment of the present invention scope of disclosure.Tool
Body, quality described in the specification of the embodiment of the present invention can be the mass unit well known in the art such as μ g, mg, g, kg, when
So it can be regarded as mass percent.
An embodiment of the present invention provides a kind of preparation methods of white aluminum component.The white aluminum component preparation method flow chart figure
Shown in 1, include the following steps：
Step S01. carries out surface micro etch processing to aluminum component：Aluminum component is subjected to surface micro etch processing, in the aluminum component
Surface etch forms micropore；
Step S02. carries out aluminum component electric coloring treatment：It will etch at the electric coloring of aluminum component progress for being formed with micropore
Reason forms white film in aluminium workpiece surface；
Step S03：The white film is carried out dehydrating and drying and processing.
Specifically, surface micro etch processing being carried out to aluminum component in above-mentioned steps S01 so that aluminium workpiece surface has micropore, from
And the white coating that electricity coloring is formed in above-mentioned steps S02 is integrated with aluminium workpiece surface high strength bond.
In one embodiment, the method which carries out surface micro etch processing can be according to technique as shown in Figure 2
Flow is handled.The method that the aluminum component carries out surface micro etch processing includes the following steps：
Step S011：Aluminum component is subjected to oil removal treatment, alkaline etching processing and the pretreatment of neutralisation treatment successively；
Step S012：Anode electrolysis processing will be carried out through the pretreated aluminium workpiece surface, realized in the aluminum component table
Face forms micropore；
Step S013：To through the anode electrolysis, treated that the aluminum component carries out expanding treatment.
Aluminum component in above-mentioned steps S011 can be moulding or middleware etc., in addition, the aluminum component can be fine aluminium part or
Person is aluminium alloy element.In a particular embodiment, which can be with but not just for aluminium phone housing.
Due to aluminum component, surface can adhere to some greasy dirts and dust in the molding of early period, polishing, storage and handling process, because
This, the aluminum component in step S011 can effectively remove that be adhered to greasy dirt and the dust of aluminium workpiece surface etc. miscellaneous after oil removal treatment
Object, while can also ensure that aluminium workpiece surface can fully be infiltrated by subsequent treatment fluid, obtain uniform processing.Therefore, exist
In one embodiment, it is that the aluminum component is placed in degreasing fluid to handle to carry out oil removal treatment to aluminum component in step S011.Tool
Body, which can be conventional degreasing fluid, such as by partial neutral (PH8) oil removing powder HX-800 and pure water phased soln, match
Make a concentration of 55g/l-65g/l.After being heated to 55 DEG C, aluminum component impregnates 3 minutes wherein.
Before oil removal treatment is carried out to aluminum component, mirror surface treatment first is polished to aluminum component.After treating that aluminum component carries out oil removing,
Before alkaline etching processing, pure water cleaning, such as 2 grades of washings are carried out to aluminum component.
Alkaline etching in step S011 handles the oxide layer effectively to remove aluminium workpiece surface, exposes aluminum component essence metal.One
In embodiment, alkaline etching processing is mutually fused using piece alkali with pure water, compound concentration 40g/L-50g/L.After being heated up to 60 DEG C, production
Product impregnate 2 minutes in the solution, its aluminium workpiece surface oxide is made fully to react with solution, expose aluminum component essence metal.
After treating that aluminum component carries out alkaline etching processing, before neutralisation treatment, pure water cleaning, such as 2 grades of washings are carried out to aluminum component.
Neutralisation treatment in step S011 is effectively to remove the remaining alkali of aluminium workpiece surface.In one embodiment, at the neutralization
The neutralization solution of reason adds pure water to prepare using 68% nitric acid.Compound concentration is 100g/L-120g/L.Its purpose is to
The solution removal of aluminium workpiece surface alkalinity is clean.After treating that aluminum component is neutralized, pure water cleaning, such as 2 grades are carried out to aluminum component
Washing, to remove neutralization solution.
The above-mentioned pretreatment carried out to aluminum component, effectively removes impurity and oxide layer of aluminium workpiece surface etc., improves aluminium workpiece surface
Cleanliness factor so that aluminum component essence exposed metal/bare metal, be step S012 in aluminum component anode electrolysis handle so as to expand aluminium workpiece surface
Micropore carry out sufficient preparation, improve the uniformity of aluminum component micropore in step S012.
Step S012 Anodics electrolysis processing is in order to enable the aluminium of aluminium workpiece surface is corroded to leave micropore so that
Aluminium workpiece surface forms the dimpled rough surface of tool of out-of-flatness.The micro etch processing is will be through the pretreated aluminium
Part is placed in the electrolyte of anode electrolysis processing and performs etching processing.
In one embodiment, the electrolyte of step S012 Anodics electrolysis processing includes：280-300g/L sulfuric acid, preferably
For 290-300g/L, it is specifically as follows 280；1.0-2g/L oxalic acid, preferably 1.0-1.5g/L, are specifically as follows 1.5g/L.
In a further embodiment, the process conditions of anode electrolysis processing are：Temperature：18-20 DEG C, preferably 20 DEG C；
Time：18-20min, preferably 20min；Voltage：18-20V, preferably 20V.Since the temperature of anode electrolysis processing is controlled in 18-20
DEG C, therefore, in anode electrolysis processing procedure, be configured with intelligent cooling recirculation system, come ensure processing when electrolyte namely
It is the constant temperature of tank liquor.In preferred embodiment, which is gradually to be increased to 18-20V, preferably 20V from 0V.It is specific described
Voltage is that the voltage range was at the uniform velocity risen in 1 minute.Using voltage is gradually increased so that etching the rate of micropore reduces, and leads to
It crosses and slows down aluminium workpiece surface into miniature aperture speed, so as to make the further uniform and marshalling of tiny micropore.
In addition, in anode electrolysis processing procedure, it is 4-7g/L to control the aluminium ion concentration control in electrolyte.
Pass through the control to anode electrolysis treatment process condition so that the aluminium of aluminium workpiece surface becomes aluminium ion and enters solution
In, so as to leave micropore in aluminium workpiece surface, it that is to say and form one layer of rough surface with micropore in aluminium workpiece surface, and cause
It is uniform to etch the micropore formed, such as forms such as cellular micro cavity layer structures, and micropore size is moderate.In this way, effectively increase
The bond strength of aluminium workpiece surface, bond strength such as between white film.As in an embodiment, handled through the anode electrolysis
The aperture of the micropore of formation is 30-35nm.In order in follow-up electric colouring process white colorant particle can effectively into
Enter, so as to make its Adhesion enhancement, it is not easy to fade, workpiece is made to keep permanent appearance.
After being disposed to anode electrolysis, micropore carrying out washing treatment is carried out to aluminum component, it is miscellaneous in aluminum component porous layer to remove
Matter and electrolyte, if anode electrolysis handle electrolyte, so as to lower step process implementation and avoid to the next step implementation result
Have an adverse effect.Therefore, in one embodiment, the micropore carrying out washing treatment can be that 2 grades of Pure water preparations, 2 grades of ultrasounds are pure
Water process.Certainly it can also be common cleaning solution in aluminium electroloysis so that the residue remained in the microporous layers of aluminum component is abundant
It removes, so as to which the implementation for subsequent process steps and implementation result are provided and is effectively ensured.
Expanding treatment in above-mentioned steps S013 is to expand the aperture in the aluminum component porous layer after over cleaning so that
Aluminum component is with the suitable application such as follow-up required aperture of white film process, so as to enhance the knot of white film aluminium workpiece surface
Close intensity.In one embodiment, the expanding treatment is that the aluminum component after the micropore carrying out washing treatment is placed at reaming
It manages and reaming micro etch processing is carried out in liquid, in a particular embodiment, the expanding treatment liquid includes organic solvent 95%, inorganic molten
Agent 3%, activating agent 1.8%, wherein, organic solvent is but not only at least one of triethanolamine, styrene, inorganic molten
Agent is but not only ethylenediamine, and activating agent is but not only at least one of lignosulfonates, alkylsulfonate.
In further embodiment, the process conditions of the expanding treatment are：Temperature：25-30 DEG C, time：3-3.5min、pH：8-10.Pass through
Control to expanding treatment liquid and expanding treatment process conditions, aperture is multifarious same in aluminium workpiece surface porous layer is ensured
When, it can moderately expand pore size, such as so that the aperture of micropore is 50-70nm, so that in follow-up electric colouring process
Middle white colorant particle can be efficiently entering, so as to make its Adhesion enhancement, it is not easy to fade, workpiece is made to keep permanent appearance
Effect.
In a further embodiment, after treating the expanding treatment in step S013, further include to aluminum component carry out again into
The process of row micropore carrying out washing treatment, to remove residue in micropore, such as expanding treatment liquid.In a particular embodiment, the micropore
Carrying out washing treatment can be carried out directly with reference to the micropore carrying out washing treatment processing step in step S013 and process conditions.
In a preferred embodiment, after the micropore carrying out washing treatment after step S013 expanding treatments, in step S02 is carried out
It before electric coloring treatment, further includes and the aluminum component is surface-treated, the surface treatment is will be by through the micro etch
The aluminum component after reason is placed in MICRO CLEAN F4 solution and starts the cleaning processing.In one embodiment, the MICRO
CLEAN F4 solution includes MICRO CLEAN F4 cleaning agents and water, and the MICRO CLEAN F4 cleaning agents and water mixing ratio
Example is (1-1.5):(5-6), and control the MICRO CLEAN F4 solution pH value be 8.5-9.By the surface treatment, no
Impurity in residual micropore is removed through cleaning micropore can be played, moreover it is possible to so that MICRO CLEAN F4 are adhered to aluminum component micropore table
After carry out electricity coloring treatment of the aluminum component in following step S02, it is particularly micro- with aluminium workpiece surface can to enhance white film for face
Hole surface bond strength, so as to enhance the binding force of white film.Wherein, MICRO CLEAN F4 are 5 parts of anhydrous sodium sulfate：
3 parts of isopropanol：1 part of butyl glycol ether：The mixture of 2 parts of mass ratioes of glycidol fat.
Electric coloring treatment in above-mentioned steps S02 be the aluminum component that will be handled in step S01 as cathode, stereotype built in groove body
As anode, electric coloring treatment is carried out under the action of direct current so that color white slurry deposits under the action of direct current
In micropore into step S01 through micro etch processing aluminium workpiece surface.
In one embodiment, the electrolyte of electric coloring treatment is color white slurry, including water, paint and white slurry；
And the mass ratio of the water, paint and white slurry is (12-13):(2-3):(1-1.2), the specific can be that 12:2:1.
In one specific embodiment, above-mentioned paint includes the component of following mass parts：
5 ± 0.2 parts of acrylic acid hydroxyl second fat
3 ± 0.2 parts of acrylic acid fourth fat
2.5 ± 0.1 parts of glycidol fat
1 ± 0.1 part of lactic acid
0.8 ± 0.1 part of propylene glycol phenylate.
In another specific embodiment, the white slurry includes the component of following mass parts：
White 3 ± 0.3 parts of toner, 5 ± 1 parts of organic solvent.
In another embodiment, the condition of the electricity coloring treatment is：DC voltage is 125V-135V, the temperature of electrolyte
Degree control is 25-27 DEG C, the pH of electrolyte is 7.0-7.5.Since the temperature of electric coloring treatment is controlled at 25-27 DEG C,
In anode electrolysis processing procedure, intelligent cooling recirculation system can be configured with as in above-mentioned steps S012, to ensure to process
When the electrolyte of electric coloring treatment that is to say the constant temperature of tank liquor.
The moon is resolved under the action of DC voltage by the condition color white slurry of above-mentioned electric coloring treatment
Positive electrolyte, so as to which under the action of voltage, electrolyte occurs mobile white so as to adsorb in the micropore of aluminium workpiece surface and be formed
Color film layer.And the high luminosity of white film is assigned, there are specular properties.Also imitating simultaneously reduces the thickness of white film, so as to
So that aluminum component has good metal-like, and white film and aluminium workpiece surface bond strength are high.
In addition, under conditions of above-mentioned electric coloring treatment, the time of electric coloring treatment can be controlled to adjust at electric coloring
The thickness of the formed white film of reason.In one embodiment, the time of electric coloring treatment is 2min.Or by controlling electricity
The time of coloring treatment so that the white film thickness to be formed is 5-8 μm.
In above-mentioned steps S03, the white film of formation is carried out dehydrating so that white film is dehydrated, and is improved
The stability of film layer.In one embodiment, the dehydration is that the aluminum component through the electric coloring treatment is submerged dehydration liquid
In；Wherein, the dehydration liquid includes surfactant and water, and the mass ratio of the surfactant and water is (1-2):100,
Specific such as 1:100.Wherein, the surfactant is but not only at least one of absolute ethyl alcohol, glycerine.By above-mentioned
The control of dehydration condition so that aluminum component includes white film and realizes wide slow moving water-removal.After processing to be drained off, drying and processing it
Before, carrying out washing treatment is carried out to aluminum component, such as Pure water preparation removes remaining dehydration liquid, avoids to white film such as white stability
Etc. performances adversely affect.The dehydration can be completed at normal temperatures.
Drying and processing in step S03 includes preliminary drying dry-cure and rear drying and processing.Wherein, the temperature of preliminary drying dry-cure
It is 75-82 DEG C, it is specific such as 80 DEG C；Time is 9-11min, specific such as 10min.The temperature of drying and processing is 178-182 DEG C afterwards, tool
Such as 180 DEG C of body；Time is 38-41min, specific such as 40min.
Dehydration and drying and processing in S03 through the above steps, realizes the Seal treatment to white film, so as to
The mechanical strength of white film is improved, such as improves scratch resistance and bond strength, while improve the stability of white film white.
From the above mentioned it is found that the preparation method color white slurry of above-mentioned white aluminum component is using electric color method electrolysis to table
The aluminium workpiece surface that face is handled through micro etch so that aluminium workpiece surface forms bloom white film.Also imitating simultaneously reduces the thickness of film layer
Degree, so that aluminum component has good metal-like, and white film and aluminium workpiece surface bond strength are high.In addition, it is prepared
Method technique is easily-controllable, and product quality is stablized, and effectively increases production efficiency, reduces production cost.
In addition, in order to improve the stability of each step processing above, aqueous solvent is arrived involved in all the above processing step,
It is preferred that the conductivity of control water is controlled within the scope of 1.5-2us/cm.
Correspondingly, on the basis of white aluminum component preparation method described above, the embodiment of the present invention additionally provides one kind
White aluminum component.The white aluminum component includes aluminum component ontology, and the aluminum component body surface is etched with several micropores, at least described micro-
Electricity coloring has white film in hole.
Wherein, aluminum component ontology as above described in the preparation method of voiceover color aluminum component through surface micro etch handle aluminum component.
In this way, etching forms micropore on aluminum component body surface.As in an embodiment, the aperture of the micropore is 50-70nm；Specifically,
Several micropores are in cellular distribution in the aluminium workpiece surface.
The color white slurry of above-mentioned white film that electricity coloring is formed is as above described in the preparation method of voiceover color aluminum component
, including water, paint and white slurry.And the mass ratio of the water, paint and white slurry is (12-13):(2-3):(1-
1.2), the specific can be that 12:2:1.
In one specific embodiment, above-mentioned paint includes the component of following mass parts：
5 ± 0.2 parts of acrylic acid hydroxyl second fat
3 ± 0.2 parts of acrylic acid fourth fat
2.5 ± 0.1 parts of glycidol fat
1 ± 0.1 part of lactic acid
0.8 ± 0.1 part of propylene glycol phenylate.
In another specific embodiment, the white slurry includes the component of following mass parts：
White 3 ± 0.3 parts of toner, 5 ± 1 parts of organic solvent.
In another embodiment, the condition of the electricity coloring treatment is：DC voltage is 125-130V, the temperature of electrolyte
It is 7.0-7.5 to control as the pH of 25-27 DEG C, electrolyte.Since the temperature of electric coloring treatment is controlled at 25-27 DEG C, in sun
In the electrolytic process of pole, intelligent cooling recirculation system can be configured with as in above-mentioned steps S012, come when ensureing processing
The electrolyte of electric coloring treatment that is to say the constant temperature of tank liquor.
It at least in the micropore of aluminium workpiece surface and is formed by the condition color white slurry of above-mentioned electric coloring treatment
White film.And the high luminosity of white film is assigned, there are specular properties.Also imitating simultaneously reduces the thickness of white film, from
And cause aluminum component that there is good metal-like, and white film and aluminium workpiece surface bond strength are high.In addition, in above-mentioned electricity coloring
Under conditions of processing, the time of electric coloring treatment can be controlled to adjust the thickness for the white film that electric coloring treatment is formed.
In one embodiment, the time of electric coloring treatment is 2min.Or formed by controlling the time of electric coloring treatment
White film thickness is 5 μm.Therefore, above-mentioned white aluminum component powers on coloring white film on the surface that surface etch has micropore, from
And film layer bloom white is assigned, and film layer and aluminium workpiece surface bond strength are high.In addition, white film is thin, above-mentioned white is assigned
The good metal-like of aluminum component effectively increases the quality of aluminum component, improves its market competitiveness.
In addition, above-mentioned white aluminum component can be in handset shell, computer casing, air-conditioning outline border and housing, housing of TV set
It is any.
Now by taking specific white aluminum component and preparation method thereof as an example, the present invention is described in further detail.
Embodiment 1
A kind of white aluminum component and preparation method thereof, comprises the technical steps that：
S11：Aluminum component through mirror surface treatment is subjected to -2 grades of washings of oil removal treatment-alkaline etching and handles -2 grades of washing-neutralisation treatments,
To remove the impurity layer of aluminium workpiece surface, including oxide layer so that the exposed essential metal of aluminum component；Wherein,
Oil removal treatment：Degreasing powder, with pure water phased soln, is prepared dense using partial neutral (PH8) oil removing powder HX-800
It spends for 55g/lg/l, after being heated to 55 DEG C, workpiece impregnates 3 minutes wherein；
Alkaline etching processing：It is mutually fused with pure water using piece alkali, compound concentration 40g/Lg/l, after being heated up to 60 DEG C, aluminum component exists
It is impregnated 2 minutes in solution, its aluminium workpiece surface oxide is made fully to react with solution, expose essential metal；
Neutralisation treatment：Neutralize solution adds pure water to prepare using 68% nitric acid, compound concentration 100g/Lg/l.Its
Purpose is clean in order to which the solution of product surface alkalinity is removed, for that will perform sufficient preparation into anode electrolytic tank；
S12：The aluminum component pre-processed through step S11 is subjected to surface micro etch processing, etches to be formed in the aluminium workpiece surface
Micropore；Wherein, the technique of micro etch processing is：Anode electrolysis handles -2 grades of washings--2 grades of expanding treatment washing；
The condition of anode electrolysis processing is as follows：
Electrolyte：Sulfuric acid 300g/L, oxalic acid 1.5g/L, remaining be pure water；
Anode electrolysis treatment process parameter：18-20 DEG C of temperature, time 20min, voltage 20V, voltage are even in 1 minute
Speed rises to 20V；
Aluminium ion concentration control in Anodic processing procedure in electrolyte is 4-7g/L.
The condition of expanding treatment is as follows：
Expanding treatment liquid：Organic solvent 95%, inorganic solvent 3%, activating agent 1.8%；
The technological parameter of expanding treatment：Temperature：25℃；Time：3min；pH：8；
S13：The aluminum component that micro etch in step S12 is handled is started the cleaning processing in MICRO CLEAN F4 solution, with
It cleans the impurity in micropore and improves the adhesion strength in micropore；Wherein, MICRO CLEAN F4 solution is by MICRO CLEAN
The proportioning of F4 cleaning agents and pure water is 1：The ranging from 8.5-9 of 5, pH management and control；
S14：By in step S13 to the aluminum component that aluminum component starts the cleaning processing in carrying out electric coloring treatment, in aluminium workpiece surface shape
Into white film；
The condition of electric coloring treatment is as follows：
Electrolyte：The mass ratio of water, paint and white slurry is 12:2：1；Wherein, the formula of paint is (acrylic acid hydroxyl second
Fat) 5：(acrylic acid fourth fat) 3：(glycidol fat) 2.5：(lactic acid) 1：(propylene glycol phenylate) 0.8；The formula of white slurry is
(white toner) 3：(organic solvent) 5；
The technological parameter of electric coloring treatment：DC voltage is 130V, the control of the temperature of electrolyte is 25 DEG C, electrolyte
PH is 7.0, and the time is 2 minutes；
S15：By step S14, treated that aluminum component is carried out dehydrating at the closing of the rear drying and processing of-preliminary drying dry-cure-
Reason；Wherein,
All dehydration liquid of dehydration includes surfactant and water, and the mass ratio of the surfactant and water is
1:100.Wherein, the surfactant is organic solvent；
The temperature of the preliminary drying dry-cure is 80 DEG C；Time is 10min；
The temperature of drying and processing is 180 DEG C afterwards；Time is 40min.
Embodiment 2
1 step of example is repeated, voltage operation will be changed to after being finally transferred to 20V in wherein S12, and be reduced electrolysis time and arrive
18min, other conditions are constant.
Embodiment 3
Repeat 1 step of example, will in wherein S14 the electrolytic coloring time increase to 30 seconds 2 minutes, other conditions are constant.
Comparative example 1
Anodic oxidation dyestuff is carried out to the aluminum component in embodiment 1 using existing conventional anodes oxidizing process.
Comparative example 2
Aluminum component in embodiment 1 is film-made using existing spray painting.
Correlated performance is tested：
The aluminum component that above-described embodiment 1-3 white aluminum components prepared and comparative example are provided is carried out such as the correlation in the following table 1
It can test, test result is as shown in table 1.
Table 1
From table 1 it follows that white aluminum component provided in an embodiment of the present invention is white, and the bloom with minute surface is white
Color.Thicknesses of layers is low simultaneously, and metal-like is strong, due to the presence of micropore so that white film is high with aluminium workpiece surface bond strength.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
All any modification, equivalent and improvement made within refreshing and principle etc., should all be included in the protection scope of the present invention.
Claims (22)
1. a kind of preparation method of white aluminum component, includes the following steps：
Aluminum component is subjected to surface micro etch processing, etches to form micropore in the aluminium workpiece surface；
The electric coloring treatment of aluminum component progress for being formed with micropore will be etched, white film is formed in aluminium workpiece surface；
The white film is carried out dehydrating and drying and processing；
Wherein, the electrolyte of the electric coloring treatment is color white slurry, including water, paint and white slurry；It is and described
The mass ratio of water, paint and white slurry is (12-13):(2-3):(1-1.2).
2. preparation method according to claim 1, which is characterized in that described to paint the component for including following mass parts：
3. preparation method according to claim 1, which is characterized in that the white slurry includes the group of following mass parts
Point：
White 3 ± 0.3 parts of toner, 5 ± 1 parts of organic solvent.
4. according to any preparation methods of claim 1-3, which is characterized in that the condition of the electricity coloring treatment is：Directly
Galvanic electricity voltage is 125V-130V, the control of the temperature of electrolyte is 25-27 DEG C, the pH of electrolyte is 7.0-7.5.
5. according to any preparation methods of claim 1-3, which is characterized in that the thickness of the white film is 5-8 μm.
6. according to any preparation methods of claim 1-3, which is characterized in that the dehydration is will be through the electricity
The aluminum component of color processing is submerged in dehydration liquid；Wherein, the dehydration liquid includes surfactant and water, and the surface-active
The mass ratio of agent and water is (1-2):100；And/or
The drying and processing includes preliminary drying dry-cure and rear drying and processing, and the temperature of the preliminary drying dry-cure is 75-82 DEG C, the time
For 9-11min；The temperature of drying and processing is 178-182 DEG C after described, time 38-41min.
7. preparation method according to claim 6, which is characterized in that the surfactant is absolute ethyl alcohol, in glycerine
At least one.
8. according to claim 1-3,7 any preparation methods, which is characterized in that the aperture of the micropore is 50-70nm；
And/or
Several micropores are in cellular distribution in the aluminium workpiece surface.
9. according to claim 1-3,7 any preparation methods, which is characterized in that the aluminum component is being carried out the miniature carving
After erosion processing, before carrying out the electric coloring treatment, further include and the aluminum component is surface-treated, the surface treatment is
The aluminum component after being handled through the micro etch is placed in MICRO CLEAN F4 solution and is started the cleaning processing.
10. preparation method according to claim 9, which is characterized in that the MICRO CLEAN F4 solution includes MICRO
CLEAN F4 cleaning agents and water, and the MICRO CLEAN F4 cleaning agents and water mixed proportion are (1-1.5)：(5-6), and control
The pH value for making the MICRO CLEAN F4 solution is 8.5-9.
11. according to any preparation method in claim 1-3,7,10, which is characterized in that the aluminum component is carried out the table
Face micro etch processing includes the following steps：
Aluminum component is subjected to oil removal treatment, alkaline etching processing and the pretreatment of neutralisation treatment successively；
To carry out anode electrolysis processing through the pretreated aluminium workpiece surface, realize formed in the aluminium workpiece surface it is micro-
Hole；
To through the anode electrolysis, treated that the aluminum component carries out expanding treatment.
12. preparation method according to claim 11, which is characterized in that the condition of anode electrolysis processing is：
The electrolyte of the anode electrolysis processing includes a concentration of 280-300g/L sulfuric acid and 1.0-2g/L oxalic acid；
Temperature：18-20 DEG C, time：18-20min, voltage：18-20V；
Aluminium ion concentration control in Anodic processing procedure in electrolyte is 4-7g/L.
13. preparation method according to claim 12, which is characterized in that the voltage was at the uniform velocity risen in 1 minute
20V。
14. according to any preparation methods of claim 11-13, which is characterized in that formed through the anode electrolysis processing
The micropore aperture be 30-35nm；And/or
The aperture of the micropore formed through the expanding treatment is 50-70nm.
15. a kind of white aluminum component, including aluminum component ontology, it is characterised in that：The aluminum component body surface is etched with several micropores, until
Few electricity coloring in the micropore has white film；Wherein, the color white slurry for forming the white film includes water, paint
And white slurry；And the mass ratio of the water, paint and white slurry is (12-13):(2-3):(1-1.2).
16. preparation method according to claim 15, which is characterized in that described to paint the component for including following mass parts：
17. preparation method according to claim 15, which is characterized in that the white slurry includes the group of following mass parts
Point：
White 3 ± 0.3 parts of toner, 5 ± 1 parts of organic solvent.
18. according to any preparation methods of claim 15-17, which is characterized in that the condition of the electricity coloring treatment is：
DC voltage is 125-130V, the control of the temperature of electrolyte is 25-27 DEG C, the pH of electrolyte is 7.0-7.5.
19. according to any preparation methods of claim 15-17, which is characterized in that the thickness of the white film is 5-8
μm。
20. according to any preparation methods of claim 15-17, which is characterized in that the aperture of the micropore is 50-
70nm。
21. according to any preparation methods of claim 15-17, which is characterized in that several micropores are in the aluminum component
Surface is in cellular distribution.
22. according to any preparation methods of claim 15-17, which is characterized in that the white aluminum component is handset shell,
Any one of computer casing, air-conditioning outline border and housing, housing of TV set.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2017/104541 WO2019061341A1 (en) | 2017-09-29 | 2017-09-29 | White aluminum part and preparation method therefor |
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| Publication Number | Publication Date |
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| CN108138351A true CN108138351A (en) | 2018-06-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| WO (1) | WO2019061341A1 (en) |
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|---|---|---|---|---|
| CN1006000B (en) * | 1985-04-23 | 1989-12-06 | 东北工学院 | Method to produce white film on surface of aluminum or aluminum alloys |
| JPS63109195A (en) * | 1986-10-24 | 1988-05-13 | Minoru Mitani | Surface treatment of aluminum or its alloy |
| US5431791A (en) * | 1993-12-21 | 1995-07-11 | Basf Corporation | Cathodic electrodeposition method utilizing cyclic carbonate-curable coating composition |
| CN102834551B (en) * | 2011-03-08 | 2015-07-01 | 纳米及先进材料研发院有限公司 | Method for producing white anodized aluminum oxide |
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2017
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- 2017-09-29 WO PCT/CN2017/104541 patent/WO2019061341A1/en active Application Filing
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|---|---|---|---|---|
| JP2000226694A (en) * | 1999-02-02 | 2000-08-15 | Nippon Light Metal Co Ltd | Surface treatment of aluminum material |
| CN101638545A (en) * | 2009-08-31 | 2010-02-03 | 武汉双虎汽车涂料有限公司 | Fluorine-containing cathode electrophoresis paint and preparation method thereof |
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| CN103031582A (en) * | 2011-09-29 | 2013-04-10 | 电化皮膜工业株式会社 | Method for manufacturing colored aluminum product or colored aluminum alloy product, pigment composition for coloration, and colored aluminum product or colored aluminum alloy product |
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| WO2019061341A1 (en) | 2019-04-04 |
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