CN102935745A - Film coating color aluminum alloy and preparation method thereof - Google Patents
Film coating color aluminum alloy and preparation method thereof Download PDFInfo
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- CN102935745A CN102935745A CN2012103694320A CN201210369432A CN102935745A CN 102935745 A CN102935745 A CN 102935745A CN 2012103694320 A CN2012103694320 A CN 2012103694320A CN 201210369432 A CN201210369432 A CN 201210369432A CN 102935745 A CN102935745 A CN 102935745A
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- film
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- aluminum alloy
- paint film
- colored aluminum
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Abstract
The present invention provides a film coating color aluminum alloy, wherein an electrophoresis paint film is coated on the surface of an aluminum alloy, is an ultraviolet light curing paint film, and has a thickness of 10-15 mum. The invention further provides a method for preparing the film coating color aluminum alloy. The film coating color aluminum alloy has the following characteristics that: the surface of the color aluminum alloy does not require oxidation film preparation, the coated electrophoresis paint film has a plurality of colors, the surface is bright, the decoration is strong, an electrophoresis step is reduced during the preparation process, manpower and material resources are saved, and pollution emission is reduced. With the film coating color aluminum alloy, paint removing reprocessing is easily achieved, and material cost can be saved.
Description
Technical field
The invention belongs to the electrophoresis process field, be specifically related to a kind of method of electrophoresis plating organic polymer and the product that the method obtains.
Background technology
Following three kinds of methods are adopted in surface treatment with color material of aluminum alloy of decorative effect: surperficial anodic oxidation, application acrylic acid baking vanish or powdery paints and electrodeposition coated film.The surface anodic oxidation is that aluminium alloy part or base material are carried out water flushing after the surperficial anodic oxidation, and then with organic active dye solution contacting and coloring, surface heating that again will be painted seals, and makes the aluminium alloy with organic dye layer; Application acrylic acid baking vanish or powdery paints are that acrylic acid baking vanish or the powdery paints mode by electrostatic spraying is adsorbed onto the aluminum or aluminum alloy surface, then crosslinking curing film forming under hot conditions.
In the prior art, aluminum alloy electrophoresis plated film (ED) adopts following steps (referring to Fig. 2): with oxide-film, sealing of hole, electrodeposition coated film, the curing of hanging on the aluminium alloy part, fuel-displaced, alkaline etching, neutralization, anodic oxidation obtain electrolytic coloring, then take off aluminium alloy part.Oxidized aluminum alloy+ED technology process flow process is longer, the wasting manpower and material resources, and oxide-film is easy to change in the electrophoresis engineering, so that there is larger uncertainty in whole technique, can't import in enormous quantities smoothly production.And this technique defective products is difficult to do over again.
Directly electrodeposition coated film means the technique that reduces electrolysis, must save a large amount of manpower and materials.But how the minimizing processing step can also obtain quality aluminum alloy materials good and attractive in appearance, is still unsolved technical problem of aluminum alloy materials field.
Summary of the invention
For the deficiencies in the prior art part, the objective of the invention is to propose a kind of plated film colored aluminum.
The concrete technical scheme that realizes the object of the invention is:
A kind of plated film colored aluminum, it is to be coated with electrodeposited paint film in aluminum alloy surface.Prior art prepares colored aluminum, need to be coated with first oxide-film in aluminum alloy surface, and then be coated with electrodeposited paint film.The colored aluminum surface that the present invention proposes only is coated with electrodeposited paint film, and has multicolour, surface-brightening, and is ornamental strong.
Wherein, described electrodeposited paint film is ultraviolet light polymerization (UV) paint film.
Wherein, the thickness of described electrodeposited paint film is 10-15 μ m, is preferably 12-14 μ m.
Wherein, the appearance of described plated film colored aluminum is coated with electrodeposited paint film.Described plated film colored aluminum can be various shape, is applied to the fields such as articles for daily use, construction and decoration.For the aluminium alloy part with hollow configuration, only have its appearance to be coated with electrodeposited paint film, play and decorate and protective effect.
A kind of method for preparing plated film colored aluminum of the present invention comprises step: aluminium alloy part to be coated is carried out electrodeposition coated film, then solidify.
Wherein, described aluminium alloy part to be coated carries out electrodeposition coated film through after oil removing, alkaline etching and the neutralisation treatment.The processing method that is treated to this area routine of described oil removing, it is that aluminium alloy part to be coated is hung up, uses the degreaser oil removing.
Wherein, described alkaline etching is with the sodium hydroxide solution alkaline etching that is added with inhibitor, then neutralizes with oxalic acid.This process adopts this area routine techniques, and for example naoh concentration is 40-60g/L, and inhibitor uses a kind of among gluconic acid sodium salt, natrium citricum, glycerine, sorbierite, sodium tartrate, the EDTA, and addition is 20% of addition amount of sodium hydroxide.The consumption of oxalic acid is in making and the pH value of backlash wash water gets final product for 6-8.
Wherein, the electrophoretic coating of described electrodeposition coated film is the ultraviolet light polymerization electrophoretic coating, contains acrylic resin, pigment, and ratio is 3-30:1.
Wherein, the current density of described electrodeposition coated film is 1-5A/m
2, aluminium alloy part places anode.Under the effect of applying direct current electric field, cell reaction can occur at the two poles of the earth in water, at anode, forms H
+The coating deposition is convenient in the district.
Anode reaction 2OH
-→ O
2+ 2H
++ 4e (1)
Cathode reaction H
2O+e → 1/2H
2+ OH
-(2)
Resin anion (R.A.) and OH
-Anode moves under electric field action, and cation is simultaneously to movable cathode.Be coated with surface of the work at anode, the acid H of resin anion (R.A.) and anode surface
+The reaction of (3) formula occurs in ionization, forms resin deposit and separates out, and the deposition what is coated with the aluminium alloy part surface.Electrophoresis process is attended by the process that electric osmose dewaters.
R-COO
-+H
+→R-COOH （3）
Wherein, the time of described electrodeposition coated film is 50-70min, and temperature is normal temperature, can select 23-25 ℃.
Use ultraviolet light polymerization behind the electrophoresis, be specially the aluminum alloy surface behind the UV-irradiation electrodeposition coated film that uses wavelength 190-280nm.The UV-irradiation initiated polymerization makes acrylic resin generation polymerization with light reaction performance and the curing reaction of bridge formation, can finish at short notice the process of curing.Be 1-2 minute hardening time, and solidification temperature is 60-80 ℃.
Beneficial effect of the present invention is:
Prior art prepares colored aluminum, need to be coated with first oxide-film in aluminum alloy surface, and then be coated with electrodeposited paint film.The colored aluminum surface that the inventive method obtains only is coated with electrodeposited paint film, and has multicolour, surface-brightening, and is ornamental strong.Its preparation process has reduced electrolysis step, uses manpower and material resources sparingly, and reduces pollution emissions.The easy depainting of plated film colored aluminum that the present invention proposes is done over again, can the economical with materials cost.
The present invention adopts the direct ED technique of aluminium alloy, Cost reduction, and processing procedure reduces, and total process rate promotes, and can obtain better appearance effect and also can put into production in a large number.This method can prevent that material from corroding in air; By the ED technology of mix colors, so that coating has the multicoloured surface effect of high glaze
Description of drawings
Fig. 1 is the embodiment of the invention 1 made plated film colored aluminum parts.
Fig. 2 is the process chart of prior art electrodeposition coated film.
Fig. 3 is process chart of the present invention.
Among the figure, 1 for being coated with the appearance of electrodeposited paint film, and 2 for there not being the face of plated film.
The specific embodiment
Following examples are used for explanation the present invention, limit the scope of the invention but be not used in.
Among the embodiment, if no special instructions, employed method and apparatus is the method and apparatus of this area routine.
Among the embodiment, used degreaser is available from Guangdong aluminium companion chemical industry (LL-QL07), and the UV electrophoretic coating is available from Japanese clear water.
Embodiment 1:
Be used for the aluminium alloy part of Curtain rail, its shape is referring to Fig. 1.The one side 2 of hollow does not have plated film.Appearance 1 is coated with colored paint film.
Embodiment 2:
The preparation of the plated film colored aluminum of embodiment 1, technological process such as Fig. 3.Comprise step: will be hung on the suspension member on the aluminium alloy part to be coated, with degreaser base material is carried out oil removal treatment, then alkaline etching in inhibitor EDTA and sodium hydroxide solution is used in the oxalic acid and alkaline solution again, in and backlash wash water pH value be 7.Immerse in the electrophoresis tank, at current density 2 peace/m
2Lower electrophoretic deposition 50s, the coating of electrophoresis are the UV electrophoretic coating, wherein add the pigment of mass ratio 1/10, and pigment adds with the form of mill base.Curing agent adopts 2-hydroxy-2-methyl-1-phenylacetone, is used for causing photocuring reaction, and its ratio of adding in coating is the 30wt% of acrylic resin.Then solidify 2min under 240nm ultraviolet lighting condition, 75 ℃ of the temperature of curing are taken off aluminium alloy part.
The aluminium alloy part that obtains only has appearance surfaces to plate coloured electrodeposited paint film, and bright in luster, color and luster is even.Hardness is 2H, alkali resistance (5%NaOH, 25 ℃) 250 hours, acid resistance (5%H
2SO
4, 25 ℃) and 250 hours, resistance to water (boiling water 5h) is without unusual.Film thickness is 12 microns.
Embodiment 3
The preparation of the plated film colored aluminum of embodiment 1, technological process such as Fig. 3.Comprise step: will be hung on the suspension member on the aluminium alloy part to be coated, with degreaser base material is carried out oil removal treatment, then alkaline etching in sodium tartrate inhibitor and sodium hydroxide solution is used in the oxalic acid and alkaline solution again, in and backlash wash water pH value be 7.Immerse in the electrophoresis tank, at current density 1 peace/m
2Lower electrophoretic deposition 70s, the coating of electrophoresis are the UV electrophoretic coating, and mill base is yellow, and the ratio of color paste consumption and acrylic resin is 1:15.Curing agent adopts 2-hydroxy-2-methyl-1-phenylacetone, is used for causing photocuring reaction, and its ratio of adding in coating is 40% of acrylic resin.Then solidify 2min under 240nm ultraviolet lighting condition, 75 ℃ of the temperature of curing are taken off aluminium alloy part.
The aluminium alloy part surface that obtains is yellow, and film thickness is 14 microns.
Embodiment 4
The preparation of the plated film colored aluminum of embodiment 1, technological process such as Fig. 3.Comprise step: will be hung on the suspension member on the aluminium alloy part to be coated, with degreaser base material is carried out oil removal treatment, then alkaline etching in natrium citricum inhibitor and sodium hydroxide solution is used in the oxalic acid and alkaline solution again, in and backlash wash water pH value be 7.Immerse in the electrophoresis tank, at current density 5 peace/m
2Lower electrophoretic deposition 60s, the coating of electrophoresis is the UV electrophoretic coating, is added with mill base and silver powder, and quality of cathode silver is identical with mill base, and the mass ratio of mill base and acrylic resin is 1:20.Curing agent adopts 2-hydroxy-2-methyl-1-phenylacetone, is used for causing photocuring reaction, and its ratio of adding in coating is 50% of acrylic resin.Then solidify 1min under 240nm ultraviolet lighting condition, 65 ℃ of the temperature of curing are taken off aluminium alloy part.
The aluminium alloy part that obtains is silvery white.Film thickness is 15 microns.
Above embodiment is described preferred embodiment of the present invention; be not that scope of the present invention is limited; design under the prerequisite of spirit not breaking away from the present invention; various modification and improvement that the common engineers and technicians in this area make technical scheme of the present invention all should fall in the definite protection domain of claims of the present invention.
Claims (10)
1. a plated film colored aluminum is characterized in that, is coated with electrodeposited paint film in aluminum alloy surface.
2. plated film colored aluminum as claimed in claim 1 is characterized in that, described electrodeposited paint film is the ultraviolet light polymerization paint film.
3. plated film colored aluminum as claimed in claim 1 is characterized in that, the thickness of described electrodeposited paint film is 10-15 μ m.
4. plated film colored aluminum as claimed in claim 3 is characterized in that, the thickness of described electrodeposited paint film is 12-14 μ m.
5. a method for preparing the arbitrary described plated film colored aluminum of claim 1-4 comprises step: aluminium alloy part to be coated is carried out electrodeposition coated film, then solidify.
6. method as claimed in claim 5 is characterized in that, described aluminium alloy part to be coated carries out electrodeposition coated film through after oil removing, alkaline etching and the neutralisation treatment.
7. such as claim 5 or 6 described methods, it is characterized in that, described alkaline etching is with the NaOH solution alkaline etching that contains inhibitor, then neutralizes with oxalic acid.
8. such as claim 5 or 6 described methods, it is characterized in that, the electrophoretic coating of described electrodeposition coated film is the ultraviolet light polymerization electrophoretic coating, contains acrylic resin and pigment, and the mass ratio of acrylic resin and pigment is 3-30:1.
9. such as claim 5 or 6 described methods, it is characterized in that, the current density of described electrodeposition coated film is 1-5A/m
2
10. such as claim 5 or 6 described methods, it is characterized in that, the time of described electrodeposition coated film is 50-70s.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210369432.0A CN102935745B (en) | 2012-09-28 | 2012-09-28 | Film coating color aluminum alloy and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210369432.0A CN102935745B (en) | 2012-09-28 | 2012-09-28 | Film coating color aluminum alloy and preparation method thereof |
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|---|---|
| CN102935745A true CN102935745A (en) | 2013-02-20 |
| CN102935745B CN102935745B (en) | 2015-06-17 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103556206A (en) * | 2013-08-08 | 2014-02-05 | 广东银一百创新铝业有限公司 | New aluminum black pearl color electrophoresis coloring process |
| CN108774745A (en) * | 2018-05-30 | 2018-11-09 | 广东耀银山铝业有限公司 | A kind of easy pole electrophoresis production technology and aluminium section bar obtained |
| CN109811390A (en) * | 2019-01-14 | 2019-05-28 | 苏州华远纳米烫印科技有限公司 | Notebook aluminum or aluminum alloy part innerside and the milling corrosion-resistant paint layer depositing operation of smooth surface |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1318656A (en) * | 2001-04-16 | 2001-10-24 | 龙口市金穗铜铝材厂 | Nanometer treatment method of aluminium shape surface |
| CN101220497A (en) * | 2007-01-09 | 2008-07-16 | 臧明华 | Simulation stainless steel process technique for aluminum alloy material surface |
| JP2011149038A (en) * | 2010-01-19 | 2011-08-04 | Sumitomo Light Metal Ind Ltd | High gloss aluminum coating material for casing and method of manufacturing the same |
| CN202923052U (en) * | 2012-09-28 | 2013-05-08 | 奥捷五金(江苏)有限公司 | Colored coated aluminum alloy |
-
2012
- 2012-09-28 CN CN201210369432.0A patent/CN102935745B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1318656A (en) * | 2001-04-16 | 2001-10-24 | 龙口市金穗铜铝材厂 | Nanometer treatment method of aluminium shape surface |
| CN101220497A (en) * | 2007-01-09 | 2008-07-16 | 臧明华 | Simulation stainless steel process technique for aluminum alloy material surface |
| JP2011149038A (en) * | 2010-01-19 | 2011-08-04 | Sumitomo Light Metal Ind Ltd | High gloss aluminum coating material for casing and method of manufacturing the same |
| CN202923052U (en) * | 2012-09-28 | 2013-05-08 | 奥捷五金(江苏)有限公司 | Colored coated aluminum alloy |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103556206A (en) * | 2013-08-08 | 2014-02-05 | 广东银一百创新铝业有限公司 | New aluminum black pearl color electrophoresis coloring process |
| CN103556206B (en) * | 2013-08-08 | 2015-11-25 | 广东银一百创新铝业有限公司 | A kind of aluminum black pearl color electrophoresis colour novel process |
| CN108774745A (en) * | 2018-05-30 | 2018-11-09 | 广东耀银山铝业有限公司 | A kind of easy pole electrophoresis production technology and aluminium section bar obtained |
| CN109811390A (en) * | 2019-01-14 | 2019-05-28 | 苏州华远纳米烫印科技有限公司 | Notebook aluminum or aluminum alloy part innerside and the milling corrosion-resistant paint layer depositing operation of smooth surface |
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| CN102935745B (en) | 2015-06-17 |
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