CN108117773A - A kind of illuminating colour and the blackish green color method of aluminum alloy die casting - Google Patents
A kind of illuminating colour and the blackish green color method of aluminum alloy die casting Download PDFInfo
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- CN108117773A CN108117773A CN201711400185.5A CN201711400185A CN108117773A CN 108117773 A CN108117773 A CN 108117773A CN 201711400185 A CN201711400185 A CN 201711400185A CN 108117773 A CN108117773 A CN 108117773A
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
- C09B67/00—Influencing the physical, e.g. the dyeing or printing properties of dyestuffs without chemical reactions, e.g. by treating with solvents grinding or grinding assistants, coating of pigments or dyes; Process features in the making of dyestuff preparations; Dyestuff preparations of a special physical nature, e.g. tablets, films
- C09B67/0033—Blends of pigments; Mixtured crystals; Solid solutions
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
- C25D11/02—Anodisation
- C25D11/04—Anodisation of aluminium or alloys based thereon
- C25D11/18—After-treatment, e.g. pore-sealing
- C25D11/20—Electrolytic after-treatment
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
- C25D11/02—Anodisation
- C25D11/04—Anodisation of aluminium or alloys based thereon
- C25D11/18—After-treatment, e.g. pore-sealing
- C25D11/24—Chemical after-treatment
- C25D11/243—Chemical after-treatment using organic dyestuffs
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
- C25D11/02—Anodisation
- C25D11/04—Anodisation of aluminium or alloys based thereon
- C25D11/18—After-treatment, e.g. pore-sealing
- C25D11/24—Chemical after-treatment
- C25D11/246—Chemical after-treatment for sealing layers
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Abstract
The invention discloses a kind of illuminating colour and the blackish green color methods of aluminum alloy die casting, belong to aluminum alloy die casting coloring field.The illuminating colour is to include：The aqueous solution of acid light yellow, dark blue, acid black and glacial acetic acid, wherein, the concentration of the acid light yellow is 4 8g/L, and the dark blue concentration is 0.5 4g/L, and the concentration of the acid black is 0.2 0.4g/L, and the concentration of the glacial acetic acid is 0.1 3g/L.The described method includes：Aluminum alloy die casting is coloured using illuminating colour, the illuminating colour is to include：The aqueous solution of acid light yellow, dark blue, acid black and glacial acetic acid, wherein, the concentration of the acid light yellow is 4 8g/L, and the dark blue concentration is 0.5 4g/L, and the concentration of the acid black is 0.2 0.4g/L, and the concentration of the glacial acetic acid is 0.1 3g/L.Illuminating colour provided in an embodiment of the present invention can carry out aluminum alloy die casting blackish green chromatic colorant, the blackish green color method of aluminum alloy die casting provided in an embodiment of the present invention aluminum alloy die casting is colored as it is blackish green, and with metallic luster.
Description
Technical field
The present invention relates to aluminum alloy die castings to colour field, and more particularly to a kind of illuminating colour and aluminum alloy die casting are blackish green
Chromatic colorant method.
Background technology
Alloy colouring refers to that aluminium alloy passes through the table in aluminium alloy the methods of chemical impregnation, electrochemical process and heat treating process
Face forms one layer of film layer for carrying certain color, and the film layer has certain anti-corrosion capability.
Have at present it is a kind of aluminum alloy die casting is colored as bronze color method, this method is included aluminium alloy to be colored
Surface is passivated, anodic oxidation, coloring and Seal treatment, in coloring treatment, using acid dark-blue, alizarin yellow and glacial acetic acid
As illuminating colour.
In the implementation of the present invention, inventor has found that the prior art has at least the following problems：
The coloring color of existing aluminum alloy die casting is single, simultaneously as aluminum alloy die casting complicated component, this causes
Aluminum alloy die casting is using existing blackish green metal coloring dyestuff not easy coloring, and this defines the applications of aluminum alloy die casting
Scope.
The content of the invention
In order to solve the problems, such as that aluminum alloy die casting coloring color of the prior art is single, an embodiment of the present invention provides
A kind of illuminating colour and the blackish green color method of aluminum alloy die casting.The technical solution is as follows：
On the one hand, an embodiment of the present invention provides a kind of illuminating colour, the illuminating colour is to include：Acid light yellow, Tibetan
The aqueous solution of blue or green, acid black and glacial acetic acid, wherein, the concentration of the acid light yellow is 4-8g/L, and the dark blue concentration is
0.5-4g/L, the concentration of the acid black is 0.2-0.4g/L, and the concentration of the glacial acetic acid is 0.1-3g/L.
On the other hand, an embodiment of the present invention provides a kind of blackish green color method of aluminum alloy die casting, the method bags
It includes：
Aluminum alloy die casting is coloured using illuminating colour, the illuminating colour is to include：Acid light yellow, it is dark blue,
The aqueous solution of acid black and glacial acetic acid, wherein, the concentration of the acid light yellow is 4-8g/L, and the dark blue concentration is 0.5-
4g/L, the concentration of the acid black is 0.2-0.4g/L, and the concentration of the glacial acetic acid is 0.1-3g/L.
Specifically, the coloration temperature is 40-65 DEG C, and the coloration time is 5-20min.
Specifically, before the aluminum alloy die casting is coloured, the aluminum alloy die casting is subjected to coloring pretreatment,
The coloring pretreatment includes：
The aluminum alloy die casting is placed in concentrated nitric acid and impregnates 5-10s；Wherein, the volumetric concentration of concentrated nitric acid can be
85%.
Using fine aluminium as anode, will cathode, juxtaposition be used as by the aluminum alloy die casting after concentrated nitric acid immersion treatment
Coloring pretreatment is carried out in pretreatment fluid in colouring, the reaction temperature of the coloring pretreatment is 20-35 DEG C, the pre- place of coloring
The voltage of reason is 5-10V, current density 0.1-0.5A/dm2, the time of the coloring pretreatment is 0.5-2min；
The aluminum alloy die casting is placed at 80-90 DEG C and heats 6-12h.
Specifically, the coloring pretreatment fluid is the aqueous solution for including aluminum sulfate and glacial acetic acid, the concentration of the aluminum sulfate
For 0.5-2g/L, the concentration of the glacial acetic acid is 1-3g/L.
Further, the aluminum alloy die casting is subjected to anodized, the anodic oxidation before the coloring
Method include：The aluminum alloy die casting is placed in the sulfuric acid solution that concentration is 180-220g/L, the anodic oxidation
Temperature is 5-20 DEG C, and the voltage of the anodic oxidation is 8-18V, and the current density of the anodic oxidation is 0.8-1.5A/dm2。
Further, surface preparation is carried out to the aluminum alloy die casting before the anodic oxidation, the surface is pre-
The method of processing includes：
Remaining greasy dirt on the aluminum alloy die casting is removed, conventional in the prior art acid solution or lye may be employed and go
Except remaining greasy dirt on aluminum alloy die casting；
The surface of the aluminum alloy die casting is polished；
Wash the aluminum alloy die casting；
The aluminum alloy die casting is placed in concentrated nitric acid and impregnates 5-10min, obtains surface covered with described in passivating film
Aluminum alloy die casting；
The anodic oxidation is used for after the aluminum alloy die casting is cleaned.
Specifically, by the aluminum alloy die casting after coloring by washing and carrying out Seal treatment, the Seal treatment
Method include：The aluminum alloy die casting is placed in lock solution, the temperature of the Seal treatment is 80-85 DEG C, described
The time of Seal treatment is 15-20min.
Further, the lock solution is to include：The aqueous solution of nickel sulfate, cobaltous sulfate and sodium acetate, wherein, the sulphur
The concentration of sour nickel is 4.2g/L, and the concentration of the cobaltous sulfate is 0.7g/L, and the concentration of sodium acetate is 4.8g/L, the lock solution
PH value be 4.5-5.5.
Further, will be dried by the aluminum alloy die casting of Seal treatment after washing.
Further, will be processed by shot blasting by the aluminum alloy die casting of Seal treatment.
The advantageous effect that technical solution provided in an embodiment of the present invention is brought is：Illuminating colour provided in an embodiment of the present invention
Aluminum alloy die casting can be carried out to blackish green dyeing, and the aluminum alloy die casting after dyeing, rich in metallic luster, the present invention is in fact
The blackish green color method of aluminum alloy die casting of example offer is provided, aluminum alloy die casting dyed by illuminating colour it is blackish green, and
Compacting aluminium alloy after dyeing has metallic luster.
Description of the drawings
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly described, it should be apparent that, the accompanying drawings in the following description is only some embodiments of the present invention, for
For those of ordinary skill in the art, without creative efforts, other are can also be obtained according to these attached drawings
Attached drawing.
Fig. 1 is the flow chart of the blackish green color method of aluminum alloy die casting provided by Embodiment 2 of the present invention.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with attached drawing to embodiment party of the present invention
Formula is described in further detail.
Acid light yellow provided in this embodiment, dark blue, acid black and glacial acetic acid are purchased from Chemical market.
Embodiment one
An embodiment of the present invention provides a kind of illuminating colour, which is to include：Acid light yellow, dark blue, acid black
With the aqueous solution of glacial acetic acid, wherein, the concentration of acid light yellow is 4-8g/L, and dark blue concentration is 0.5-4g/L, acid black it is dense
It spends for 0.2-0.4g/L, the concentration of glacial acetic acid is 0.1-3g/L.The illuminating colour is suitable for coloring silumin die casting,
In, silumin die casting refers to the aluminum alloy die casting that silicone content is more than 10%.
The molecular weight of acid light yellow, dark blue, acid black and glacial acetic acid in the illuminating colour of the present invention is respectively less than 1000, root
According to dalton empirical table, molecular weight 1000, then corresponding aperture is 0.001 μm, meanwhile, which is utilized into 1nm
Filter membrane be filtered, which can pass through filter membrane, it was demonstrated that the illuminating colour be less than 1nm.
Illuminating colour provided in an embodiment of the present invention can colour aluminum alloy die casting, the aluminium alloy pressure after coloring
Casting is blackish green, and with metallic luster, which increase the colors of colored aluminum alloy die casting.Meanwhile the illuminating colour
Granular size is respectively less than 1nm, due to capillary absorption effect so that the illuminating colour is easy to be adsorbed to the hole of anode oxide film
Depths, and make the aluminum alloy die casting after coloring that there is higher color fastness.
Embodiment two
An embodiment of the present invention provides a kind of blackish green color method of aluminum alloy die casting, this method is suitable for high sial
Alloy pressuring casting is coloured, wherein, silumin die casting refers to the aluminum alloy die casting that silicone content is more than 10%, with reference to figure
1, this method includes：
Step 1：Surface preparation, including：
Remove remaining greasy dirt on aluminum alloy die casting；Specifically, chemical method may be employed, such as acid solution or caustic dip
Etc. modes remove remaining greasy dirt on aluminum alloy die casting.
The surface of aluminum alloy die casting is polished；Specifically, the method that mechanical polishing or chemical polishing may be employed
The surface of aluminum alloy die casting is polished.
Wash aluminum alloy die casting；
Aluminum alloy die casting is placed in concentrated nitric acid and impregnates 5-10min, obtains aluminium alloy pressure of the surface covered with passivating film
Casting；
After washing aluminum alloy die casting of the surface covered with passivating film and dried.
Step 2：Anodized, the method for anodic oxidation include：Aluminum alloy die casting is placed in concentration as 180-
In the sulfuric acid solution of 220g/L, the temperature of anodic oxidation is 5-20 DEG C, and the voltage of anodic oxidation is 8-18V, the electricity of anodic oxidation
Current density is 0.8-1.5A/dm2.The oxide film of high quality of water white transparency is obtained after anodic oxidation.Wash the aluminium after anodic oxidation
Alloy pressuring casting is simultaneously dried.It is meanwhile big by the hole of the anode oxide film on scanning electron microscope subsidiary aluminum alloy die casting
Small, the aperture of the hole of anode oxide film is 12-18nm, obtains anode oxide film by stripping method, polishes anode oxide film
Through hole is exposed in bottom, and the thickness that film is measured microscopically with instrument is 10-15 μm, the depth of this thickness i.e. hole.
Step 3：Coloring pretreatment, 1) aluminum alloy die casting is placed in concentrated nitric acid after immersion 5-10s and is washed.
2) using pure aluminum plate as anode, will cathode, juxtaposition be used as by the aluminum alloy die casting after concentrated nitric acid immersion treatment
Coloring pretreatment is carried out in colouring in pretreatment fluid, using pure aluminum plate as anode, coloring pretreatment fluid includes aluminum sulfate and glacial acetic acid,
The concentration of aluminum sulfate is 0.5-2g/L, and the concentration of glacial acetic acid is 1-3g/L, colours the reaction temperature of pretreatment as 20-35 DEG C,
The voltage of color pretreatment is 5-10V, current density 0.1-0.5A/dm2, the time for colouring pretreatment is 0.5-2min.Second
Aluminum alloy die casting is washed after step coloring pretreatment and is dried.
3) anode oxidation membrane of aluminum alloy die casting is subjected to stabilization processes, processing method is by aluminum alloy die casting
It is placed in 80-90 DEG C of insulating box, time 6-12h, and aluminum alloy die casting cools down together with insulating box.
Step 4：Dyestuff colours, and aluminum alloy die casting is coloured using illuminating colour, illuminating colour is to include acidity
The aqueous solution of light yellow, dark blue, acid black and glacial acetic acid, wherein, the concentration of acid light yellow is 4-8g/L, and dark blue concentration is 0.5-
4g/L, the concentration of acid black is 0.2-0.4g/L, and the concentration of glacial acetic acid is 0.1-3g/L.
Specifically, coloration temperature is 40-65 DEG C, coloration time 5-20min, and the aluminum alloy die casting after coloring is passed through
It washes and is dried.
Step 5：Seal treatment, the method for Seal treatment include：Aluminum alloy die casting is placed in lock solution, at closing
The temperature of reason is 80-85 DEG C, and the time of Seal treatment is 15-20min, and lock solution is to include：Nickel sulfate, cobaltous sulfate and acetic acid
The aqueous solution of sodium, wherein, the concentration of nickel sulfate is 4.2g/L, and the concentration of cobaltous sulfate is 0.7g/L, and the concentration of sodium acetate is 4.8g/
L, the pH value of lock solution is 4.5-5.5, will be dried by the aluminum alloy die casting of Seal treatment after washing.
Step 6：Polishing, the aluminum alloy die casting after coloring is mechanically polished.After aluminum alloy die casting polishing
It is sampled on anode oxide film, the thickness for measuring the anode oxide film after polishing is 16 μm.Anode oxide film is obtained with stripping method, is led to
It crosses weighing method and obtains its density beneficial to density formula as 2.45 × 103kg/m3, microhardness is measured as HV505 by hardometer.
By the aluminum alloy die casting after coloring when 48 is small after neutral salt spray test, the lustrous surface of aluminum alloy die casting
It is unchanged.
Meanwhile the aluminum alloy die casting sample after colored polish is subjected to acetes chinensis, the results show with spectrophotometer
Aberration △ E are respectively less than 1, this illustrates that the color of the aluminum alloy die casting sample does not have the phenomenon that aberration or layering.It in addition, will coloring
Aluminum alloy die casting sample after polishing carries out metallic reflection rate measurement with spectrophotometer, in visible-range, measures this
The metallic reflection rate of aluminum alloy die casting sample is more than 61%, it can be seen that, which has good anti-
Performance is penetrated, good reflecting properties are obtained by the metallic luster of the aluminum alloy die casting after coloring.Meanwhile multi-angle is seen
The aluminum alloy die casting after colored polish is examined, the aluminum alloy die casting color after the colored polish is full uniformly, and range estimation, which has no, appoints
What aberration or layering.
The blackish green color method of aluminum alloy die casting provided in an embodiment of the present invention, by acid light yellow, dark blue and acid
The cooperation of black three kinds of colors aluminum alloy die casting is dyed it is blackish green, and dye after compacting aluminium alloy have metallic luster, together
When, in the first step of coloring pretreatment provided in this embodiment, it can be reduced by the immersion of concentrated nitric acid in anode oxide film
The content of free silica prevents free silicon from adsorbing in the hole of anode oxide film, so as to improve the hole of anode oxide film
Rate, and concentrated nitric acid can react with silicon, generate the silica of water white transparency, so as to reduce in anode oxide film
The grey showed by free silica, so enhance coloring after aluminum alloy die casting surface metallic luster.At the pre- place of coloring
In the second step of reason using the principle of charge " homopolar-repulsion " eliminate sulfate ion in anode oxide film and nitrate anion from
Son, on the one hand, after removal sulfate ion and nitrate ion, clean up the hole of anode oxide film so that the present invention is implemented
The illuminating colour that example provides can enter in the hole of anode oxide film, so as to improve anode oxide film absorption acid dyes
Ability, improve tinctorial yield, on the other hand, remove the anode oxide film of sulfate ion and nitrate ion, and make anode
Oxide-film adsorbs more aluminium ions, these aluminium ions will be preferentially adsorbed at alumina diaphragm defect.The 3rd of coloring pretreatment the
The constant temperature processing of step, is to carry out stabilization processes to anode oxidation membrane so that the aluminium ion adsorbed on anode oxide film is complete
It is oxidized or transit to inside anode oxide film, during compensating for preceding processes, the aluminium ion in aluminium oxide lattice lattice point
The position of missing, so that the volume increase of anode oxide film, and making anode oxide film finer and close, more secured, on the one hand, this makes
Aluminum alloy die casting after must colouring can be processed by shot blasting anode oxide film, and anode oxide film is made to have preferably gold
Belong to gloss, on the other hand, fine and close anode oxide film can cause anode oxide film to have higher corrosion resistance.
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all the present invention spirit and
Within principle, any modifications, equivalent replacements and improvements are made should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of illuminating colour, which is characterized in that the illuminating colour is to include：Acid light yellow, dark blue, acid black and glacial acetic acid
Aqueous solution, wherein, the concentration of the acid light yellow is 4-8g/L, and the dark blue concentration is 0.5-4g/L, the acid black
Concentration for 0.2-0.4g/L, the concentration of the glacial acetic acid is 0.1-3g/L.
2. a kind of blackish green color method of aluminum alloy die casting, which is characterized in that the described method includes：
Aluminum alloy die casting is coloured using illuminating colour, the illuminating colour is to include：It is acid light yellow, dark blue, acid
Black and glacial acetic acid aqueous solution, wherein, the concentration of the acid light yellow is 4-8g/L, and the dark blue concentration is 0.5-4g/L,
The concentration of the acid black is 0.2-0.4g/L, and the concentration of the glacial acetic acid is 0.1-3g/L.
3. according to the method described in claim 2, it is characterized in that, the coloration temperature is 40-65 DEG C, the coloration time is
5-20min。
4. according to the method described in claim 2, it is characterized in that, before the aluminum alloy die casting is coloured, will described in
Aluminum alloy die casting carries out coloring pretreatment, and the coloring pretreatment includes：
The aluminum alloy die casting is placed in concentrated nitric acid and impregnates 5-10s；
Using fine aluminium as anode, will cathode be used as by the aluminum alloy die casting after concentrated nitric acid immersion treatment, be placed in
In color pretreatment fluid, the reaction temperature that the coloring pre-processes is 20-35 DEG C, and the voltage of the coloring pretreatment is 5-10V, electric
Current density is 0.1-0.5A/dm2, the time of the coloring pretreatment is 0.5-2min；
The aluminum alloy die casting is placed at 80-90 DEG C and heats 6-12h.
5. according to the method described in claim 4, it is characterized in that, the coloring pretreatment fluid is to include aluminum sulfate and glacial acetic acid
Aqueous solution, the concentration of the aluminum sulfate is 0.5-2g/L, and the concentration of the glacial acetic acid is 1-3g/L.
6. according to the method described in claim 5, it is characterized in that, by the aluminum alloy die casting before the coloring pretreatment
Anodized is carried out, the method for the anodic oxidation includes：The aluminum alloy die casting is placed in concentration as 180-220g/
In the sulfuric acid solution of L, the temperature of the anodic oxidation is 5-20 DEG C, and the voltage of the anodic oxidation is 8-18V, the anodic oxygen
The current density of change is 0.8-1.5A/dm2。
7. according to the method described in claim 6, it is characterized in that, before the anodic oxidation to the aluminum alloy die casting into
Row surface preparation, the method for the surface preparation include：
Remove remaining greasy dirt on the aluminum alloy die casting；
The surface of the aluminum alloy die casting is polished；
Wash the aluminum alloy die casting；
The aluminum alloy die casting is placed in concentrated nitric acid and impregnates 5-10min, the aluminium of the surface covered with passivating film is obtained and closes
Golden die casting；
The anodic oxidation is used for after the aluminum alloy die casting is cleaned.
8. according to the method described in claim 2, it is characterized in that, by the aluminum alloy die casting after coloring by washing simultaneously
Seal treatment is carried out, the method for the Seal treatment includes：The aluminum alloy die casting is placed in lock solution, the closing
The temperature of processing is 80-85 DEG C, and the time of the Seal treatment is 15-20min.
9. according to the method described in claim 8, it is characterized in that, the lock solution is to include：Nickel sulfate, cobaltous sulfate and vinegar
The aqueous solution of sour sodium, wherein, the concentration of the nickel sulfate is 4.2g/L, and the concentration of the cobaltous sulfate is 0.7g/L, the acetic acid
The concentration of sodium is 4.8g/L, and the pH value of the lock solution is 4.5-5.5.
10. according to the method described in claim 8, it is characterized in that, by by Seal treatment the aluminum alloy die casting into
Row polishing treatment.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112210808A (en) * | 2020-09-29 | 2021-01-12 | 九牧厨卫股份有限公司 | Preparation method of black film |
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| CN105506706A (en) * | 2016-01-04 | 2016-04-20 | 沈阳建筑大学 | Aluminum alloy anodizing coloring treatment method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112210808A (en) * | 2020-09-29 | 2021-01-12 | 九牧厨卫股份有限公司 | Preparation method of black film |
| CN112210808B (en) * | 2020-09-29 | 2021-09-17 | 九牧厨卫股份有限公司 | Preparation method of black film |
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