CN102935745B - 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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- CN102935745B CN102935745B CN201210369432.0A CN201210369432A CN102935745B CN 102935745 B CN102935745 B CN 102935745B CN 201210369432 A CN201210369432 A CN 201210369432A CN 102935745 B CN102935745 B CN 102935745B
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- film
- aluminium alloy
- aluminum alloy
- alloy part
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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 electrophoresis process field, be specifically related to the product that a kind of method of electrophoresis plating organic polymer and the method obtain.
Background technology
The surface treatment with the color material of aluminum alloy of decorative effect adopts following three kinds of methods: surface anodization, application acrylic acid baking vanish or powdery paints and electrodeposition coated film.Surface anodization rinses with water after aluminium alloy part or base material being carried out surface anodization, then with organic active dye solution contacting and coloring, then closed by painted surface heating, make the aluminium alloy with organic dye layer; Application acrylic acid baking vanish or powdery paints are that acrylic acid baking vanish or powdery paints are adsorbed onto aluminum or aluminum alloy surface by the mode of electrostatic spraying, then crosslinking curing film forming under the high temperature conditions.
In prior art, aluminum alloy electrophoresis plated film (ED) adopts following steps (see Fig. 2): by aluminium alloy part is hung, fuel-displaced, alkaline etching, neutralization, anodic oxidation obtain the oxide-film of electrolytic coloring, sealing of hole, electrodeposition coated film, solidification, then takes off aluminium alloy part.Oxidized aluminum alloy+ED technology process flow process is longer, wasting manpower and material resources, and oxide-film is easy to change in electrophoresis engineering, makes whole technique there is larger uncertainty, cannot import production in enormous quantities smoothly.And this technique defective products is difficult to do over again.
Direct electrodeposition coated film, means the technique reducing electrolysis, must save a large amount of manpower and materials.But how minimizing processing step, can also obtain quality aluminum alloy materials good and attractive in appearance, it is the still unsolved technical problem in aluminum alloy materials field.
Prior art prepares colored aluminum, needs first to be coated with oxide-film in aluminum alloy surface, and then is 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, by force ornamental.Its preparation process decreases 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, and can save material cost.
The present invention adopts the direct ED technique of aluminium alloy, reduces cost, and processing procedure reduces, and total process rate promotes, and can obtain better appearance and can put into production in a large number.This method can prevent material from corroding in atmosphere; By ED technology of mix colors, coating is made to have the multicoloured surface effect of high glaze
Summary of the invention
For the deficiencies in the prior art part, the object of the invention is to propose a kind of plated film colored aluminum.
The concrete technical scheme realizing the object of the invention is:
A kind of plated film colored aluminum, it is coated with electrodeposited paint film in aluminum alloy surface.Prior art prepares colored aluminum, needs first to be coated with oxide-film in aluminum alloy surface, and then is 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, by force ornamental.
Wherein, described electrodeposited paint film is ultraviolet light polymerization (UV) paint film.
Wherein, the thickness of described electrodeposited paint film is 10-15 μm, is preferably 12-14 μm.
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 field 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 decoration and protective effect.
Prepare a method for plated film colored aluminum of the present invention, comprise step: aluminium alloy part to be coated is carried out electrodeposition coated film, then solidifies.
Wherein, described aluminium alloy part to be coated, after oil removing, alkaline etching and neutralisation treatment, carries out electrodeposition coated film.The process of described oil removing is the processing method of this area routine, and it is hung up by aluminium alloy part to be coated, uses degreaser oil removing.
Wherein, described alkaline etching is the sodium hydroxide solution alkaline etching with being added with inhibitor, then neutralizes with oxalic acid.This process adopts this area routine techniques, and such as naoh concentration is 40-60g/L, and inhibitor uses the one in gluconic acid sodium salt, natrium citricum, glycerine, sorbierite, sodium tartrate, 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 is 6-8.
Wherein, the electrophoretic coating of described electrodeposition coated film is ultraviolet light polymerization electrophoretic coating, and containing acrylic resin, pigment, ratio is 3-30:1.
Wherein, the current density of described electrodeposition coated film is 1-5A/m
2, aluminium alloy part is placed in anode.Under the effect of applying direct current electric field, can there is cell reaction at the two poles of the earth in water, at anode, forms H
+district, is convenient to coating deposition.
Anode reaction 2OH
-→ O
2+ 2H
++ 4e (1)
Cathode reaction H
2o+e → 1/2H
2+ OH
-(2)
Resin anion (R.A.) and OH
-under electric field action, anode moves, and cation is simultaneously to movable cathode.Surface of the work is coated with, resin anion (R.A.) and the acid H of anode surface at anode
+there is the reaction of (3) formula in ionization, forms resin deposit and separate out, and deposition what is coated with 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 DEG C.
Use ultraviolet light polymerization after electrophoresis, be specially the aluminum alloy surface after the UV-irradiation electrodeposition coated film using wavelength 190-280nm.UV-irradiation initiated polymerization, the curing reaction making the acrylic resin with light reaction performance polymerization occur and build bridge, can complete the process of solidification at short notice.Hardening time is 1-2 minute, and solidification temperature is 60-80 DEG C.
Beneficial effect of the present invention is:
Accompanying drawing explanation
Fig. 1 is the embodiment of the present invention 1 made plated film colored aluminum parts.
Fig. 2 is the process chart of prior art electrodeposition coated film.
Fig. 3 is present invention process flow chart.
In figure, 1 for being coated with the appearance of electrodeposited paint film, and 2 for not having the face of plated film.
Detailed description of the invention
Following examples for illustration of the present invention, but are not used in and limit the scope of the invention.
In embodiment, if no special instructions, the method and apparatus used is the method and apparatus of this area routine.
In embodiment, degreaser used is purchased from Guangdong aluminium companion chemical industry (LL-QL07), and UV electrophoretic coating is purchased from Japanese clear water.
Embodiment 1:
For the aluminium alloy part of Curtain rail, its shape is see 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 is as Fig. 3.Comprise step: be hung on suspension member by aluminium alloy part to be coated, with degreaser, oil removal treatment carried out to base material, then alkaline etching in inhibitor EDTA and sodium hydroxide solution, then use in oxalic acid and alkaline solution, in and backlash wash water pH value be 7.Immerse in electrophoresis tank, pacify/m in current density 2
2lower electrophoretic deposition 50s, the coating of electrophoresis is UV electrophoretic coating, and wherein add the pigment of mass ratio 1/10, pigment adds with the form of mill base.Curing agent adopts 2-hydroxy-2-methyl-1-phenylacetone, and for causing photocuring reaction, its ratio of adding in coating is the 30wt% of acrylic resin.Then under 240nm ultraviolet irradiation condition, solidify 2min, the temperature of solidification 75 DEG C, takes off aluminium alloy part.
The aluminium alloy part obtained only has appearance surfaces to plate coloured electrodeposited paint film, bright in luster, uniform color.Hardness is 2H, alkali resistance (5%NaOH, 25 DEG C) 250 hours, acid resistance (5%H
2sO
4, 25 DEG C) and 250 hours, resistance to water (boiling water 5h) is without exception.Film thickness is 12 microns.
Embodiment 3
The preparation of the plated film colored aluminum of embodiment 1, technological process is as Fig. 3.Comprise step: be hung on suspension member by aluminium alloy part to be coated, with degreaser, oil removal treatment carried out to base material, then alkaline etching in sodium tartrate inhibitor and sodium hydroxide solution, then use in oxalic acid and alkaline solution, in and backlash wash water pH value be 7.Immerse in electrophoresis tank, pacify/m in current density 1
2lower electrophoretic deposition 70s, the coating of electrophoresis is 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, and for causing photocuring reaction, its ratio of adding in coating is 40% of acrylic resin.Then under 240nm ultraviolet irradiation condition, solidify 2min, the temperature of solidification 75 DEG C, takes off aluminium alloy part.
The aluminium alloy part surface obtained is yellow, and film thickness is 14 microns.
Embodiment 4
The preparation of the plated film colored aluminum of embodiment 1, technological process is as Fig. 3.Comprise step: be hung on suspension member by aluminium alloy part to be coated, with degreaser, oil removal treatment carried out to base material, then alkaline etching in natrium citricum inhibitor and sodium hydroxide solution, then use in oxalic acid and alkaline solution, in and backlash wash water pH value be 7.Immerse in electrophoresis tank, pacify/m in current density 5
2lower electrophoretic deposition 60s, the coating of electrophoresis is UV electrophoretic coating, and be added with mill base and silver powder, 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, and for causing photocuring reaction, its ratio of adding in coating is 50% of acrylic resin.Then under 240nm ultraviolet irradiation condition, solidify 1min, the temperature of solidification 65 DEG C, takes off aluminium alloy part.
The aluminium alloy part silvery white obtained.Film thickness is 15 microns.
Above embodiment is only be described the preferred embodiment of the present invention; not scope of the present invention is limited; under not departing from the present invention and designing the prerequisite of spirit; the various modification that the common engineers and technicians in this area make technical scheme of the present invention and improvement, all should fall in protection domain that claims of the present invention determine.
Claims (1)
1. prepare a method for plated film colored aluminum, described plated film colored aluminum is the aluminium alloy part for Curtain rail, and the one side of hollow does not have plated film, and appearance is coated with colored paint film; It is characterized in that,
Described method comprises step: be hung on suspension member by aluminium alloy part to be coated, with degreaser, oil removal treatment is carried out to aluminium alloy part, then alkaline etching in inhibitor EDTA and sodium hydroxide solution, then use in oxalic acid and alkaline solution, in and backlash wash water pH value be 7; Immerse in electrophoresis tank, pacify/m in current density 2
2lower electrophoretic deposition 50s, the coating of electrophoresis is UV electrophoretic coating, and wherein add the pigment of mass ratio 1/10, pigment adds with the form of mill base; Curing agent adopts 2-hydroxy-2-methyl-1-phenylacetone, and for causing photocuring reaction, its ratio of adding in coating is the 30wt% of acrylic resin; Then under 240nm ultraviolet irradiation condition, solidify 2min, the temperature of solidification 75 DEG C, takes off aluminium alloy part;
The aluminium alloy part obtained only has appearance to plate coloured electrodeposited paint film, and hardness is 2H, alkali resistance 5%NaOH, and 25 DEG C is 250 hours, acid resistance 5%H
2sO
4, 25 DEG C is 250 hours; Film thickness is 12 microns.
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| CN201210369432.0A CN102935745B (en) | 2012-09-28 | 2012-09-28 | Film coating color aluminum alloy and preparation method thereof |
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|---|---|---|---|
| CN201210369432.0A CN102935745B (en) | 2012-09-28 | 2012-09-28 | Film coating color aluminum alloy and preparation method thereof |
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| CN102935745A CN102935745A (en) | 2013-02-20 |
| CN102935745B true CN102935745B (en) | 2015-06-17 |
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| 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 |
Citations (3)
| 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 |
| CN202923052U (en) * | 2012-09-28 | 2013-05-08 | 奥捷五金(江苏)有限公司 | Colored coated aluminum alloy |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4669906B1 (en) * | 2010-01-19 | 2011-04-13 | 住友軽金属工業株式会社 | High-gloss aluminum coating material for casing and manufacturing method thereof |
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Patent Citations (3)
| 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 |
| CN202923052U (en) * | 2012-09-28 | 2013-05-08 | 奥捷五金(江苏)有限公司 | Colored coated aluminum alloy |
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