CN103203915A - Aluminum micro-arc electrophoresis composite film and preparation process thereof - Google Patents
Aluminum micro-arc electrophoresis composite film and preparation process thereof Download PDFInfo
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- CN103203915A CN103203915A CN201310101701XA CN201310101701A CN103203915A CN 103203915 A CN103203915 A CN 103203915A CN 201310101701X A CN201310101701X A CN 201310101701XA CN 201310101701 A CN201310101701 A CN 201310101701A CN 103203915 A CN103203915 A CN 103203915A
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Abstract
The invention discloses an aluminum micro-arc electrophoresis composite film and a preparation process thereof. The aluminum micro-arc electrophoresis composite film comprises a base layer (2) and a coating (3). The base layer is a ceramic film which is prepared by micro-arc oxidation on the surface of an aluminum alloy section (1) and used as the base layer before electrophoresis. The coating (3) is an electrophoresis film which is prepared by electrophoresis on the surface of the ceramic film. The preparation process includes: deoiling; washing; micro-arc oxidation; washing; electrophoresis; washing; and drying. The prepared ceramic film has various colors, and is attractive in appearance, high in surface decorating effect, better in corrosion resistance, simple in process, convenient to operate and easy to implement.
Description
Technical field
The present invention relates to a kind of aluminum alloy differential arc electrophoresis composite film and preparation technology thereof.
Background technology
Aluminium alloy is to be the general name of the alloy of base with aluminium, and its main alloy element has copper, silicon, magnesium, zinc, manganese, and less important alloying element has nickel, iron, titanium, chromium, lithium etc.Aluminium alloy density is low, but strength ratio is higher, approach or surpass the high-quality steel, plasticity is good, can be processed into various section bars, have good electric conductivity and thermal conductivity, be widely used in industrial industry-by-industry, micro-arc oxidation process and electrophoresis process are two basic technologies that aluminium alloy extrusions is processed, the differential arc oxidization technique technological process is simple, economy, environmental protection, film hardness height, good with basal body binding force, and there is the blind property of nanoscale micropore in film surface, for the painted processing of follow-up application is laid a good foundation.But the ceramic film color after differential arc oxidation is handled is single, and decorative surface is not strong, particularly some anti-corrosion rigorous environment that requires is not also reached predetermined requirement.The conventional electrophoretic technological development is very ripe, and electrophoresis rete color is abundant, corrosion resistance is good, is suitable for various incrustations and anti-corrosion protection.But pretreatment process is very complicated before the electrophoresis, comprises 20 multiple working procedures such as degreasing, washing, neutralization, anodic oxidation, painted, electrophoresis, operates various, and the water consumption is big, contain the harmful heavy metal element in the waste liquid, the wastewater and waste liquid treatment trouble, thus greatly limited its development space.How effectively with above two kinds of process integrations, make the electrophoresis composite film have above two kinds of technologies advantage separately, become the important bottleneck that the restriction aluminium section bar develops.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art, provide a kind of aluminium alloy extrusions ceramic film color that makes various, appearance looks elegant, decorative surface is strong, and corrosion resistance is better, and technology is simple, easy to operate, the aluminum alloy differential arc electrophoresis composite film and the preparation technology thereof that are easy to realize.
The objective of the invention is to be achieved through the following technical solutions: aluminum alloy differential arc electrophoresis composite film, it comprises bottom and coating, described bottom is the ceramic membrane with the bottom of differential arc oxidation method before one deck of aluminium alloy section surface preparation is as electrophoresis, the electrocoating film of described coating for having prepared at the aluminium alloy extrusions ceramic membrane surface with electrophoresis method.
The preparation technology of aluminum alloy differential arc electrophoresis composite film, it is characterized in that: it may further comprise the steps:
S1: deoil: aluminium alloy extrusions is placed 25～30 ℃ of organic solvents, kept the processing of deoiling 10～15 minutes;
S2: washing: will place mobile water to wash at normal temperatures through the aluminium alloy extrusions that step S1 finishes dealing with 3～5 minutes, wherein the pH value of water is 5～7;
S3: differential arc oxidation: it comprises following two sub-steps:
S301: aluminium alloy extrusions is placed oxidation trough electrolyte, adopt the 110V constant current that aluminium alloy extrusions is carried out preliminary oxidation processes, wherein aluminium alloy extrusions is negative electrode;
S302:: adopt positive and negative bidirectional pulse that aluminium alloy extrusions is carried out oxidation, described positive negative sense voltage rises to final voltage and keeps constant later on, and wherein final voltage is 450V, pulse frequency 750Hz, dutycycle (1 dm
2) 8%, oxidization time 4～6 minutes, treatment temperature is 20～50 ℃;
S4: washing: will take out through the aluminium alloy extrusions that step S3 finishes dealing with, place mobile water to wash at normal temperatures 3～5 minutes, wherein the pH value of water is 6～7;
S5: electrophoresis: the aluminium alloy extrusions that washing is finished placed 15～50 ℃ of electrophoresis tank electrophoretic process 2～4 minutes, and wherein the voltage of electrophoretic process is 100～180V, and electric current is 200～800A;
S6: washing: will place mobile water to wash at normal temperatures through the aluminium alloy extrusions that step S2 finishes dealing with 3～5 minutes, wherein the pH value of water is 6～7;
S7: oven dry: place baking oven 65～80 ℃ of oven dry 30～60 minutes aluminium alloy extrusions.
Organic solvent among the described step S1 is any one in gasoline, kerosene, the trichloro-ethylene.
Electrolyte in the oxidation trough among the described step S3 is 5g/LNaOH solution.
The invention has the beneficial effects as follows:
(1) the aluminium alloy extrusions ceramic film color that makes of the present invention is various, appearance looks elegant, and decorative surface is strong;
(2) aluminum substrate of the present invention and the little metallurgical binding of differential arc oxidation layer, differential arc oxidation layer and electrophoresis layer are chimeric mutually, and the whole adhesion of differential of the arc electrophoresis composite film is stronger, and corrosion resistance is better;
(3) technology of the present invention is simple, and is easy to operate, is easy to realize.
Description of drawings
Fig. 1 is structural representation of the present invention;
Among the figure, 1-aluminium alloy extrusions, 2-bottom, 3-coating.
The specific embodiment
Below in conjunction with specific embodiment technical scheme of the present invention is described in further detail:
[embodiment 1]
Aluminum alloy differential arc electrophoresis composite film, it comprises bottom 2 and coating 3, described bottom 2 is the ceramic membrane with the bottom of differential arc oxidation method before one deck of aluminium alloy extrusions 1 surface preparation is as electrophoresis, the electrocoating film of described coating 3 for having prepared at the aluminium alloy extrusions ceramic membrane surface with electrophoresis method.
The preparation technology of aluminum alloy differential arc electrophoresis composite film, it is characterized in that: it may further comprise the steps:
S1: deoil: aluminium alloy extrusions is placed 25 ℃ of organic solvent gasoline, kept the processing of deoiling 15 minutes;
S2: washing: will place mobile water to wash at normal temperatures through the aluminium alloy extrusions that step S1 finishes dealing with 3 minutes, wherein the pH value of water is 7;
S3: differential arc oxidation: it comprises following two sub-steps:
S301: it is the oxidation trough of 5g/LNaOH that aluminium alloy extrusions is placed electrolyte, adopts the 110V constant current that aluminium alloy extrusions is carried out preliminary oxidation processes, and wherein aluminium alloy extrusions is negative electrode;
S302: adopt positive and negative bidirectional pulse that aluminium alloy extrusions is carried out oxidation, described positive negative sense voltage rises to final voltage and keeps constant later on, and wherein final voltage is 450V, pulse frequency 750Hz, dutycycle (1 dm
2) 8%, oxidization time 4 minutes, treatment temperature is 50 ℃;
S4: washing: will take out through the aluminium alloy extrusions that step S3 finishes dealing with, place mobile water to wash at normal temperatures 5 minutes, wherein the pH value of water is 7;
S5: electrophoresis: the aluminium alloy extrusions that washing is finished placed 15 ℃ of electrophoresis tank electrophoretic process 4 minutes, and wherein the voltage of electrophoretic process is 100V, and electric current is 800A;
S6: washing: will place mobile water to wash at normal temperatures through the aluminium alloy extrusions that step S2 finishes dealing with 3 minutes, wherein the pH value of water is 7;
S7: oven dry: place baking oven 65 ℃ of oven dry 60 minutes aluminium alloy extrusions.
[embodiment 2]
Aluminum alloy differential arc electrophoresis composite film, it comprises bottom 2 and coating 3, described bottom 2 is the ceramic membrane with the bottom of differential arc oxidation method before one deck of aluminium alloy extrusions 1 surface preparation is as electrophoresis, the electrocoating film of described coating 3 for having prepared at the aluminium alloy extrusions ceramic membrane surface with electrophoresis method.
The preparation technology of aluminum alloy differential arc electrophoresis composite film, it is characterized in that: it may further comprise the steps:
S1: deoil: aluminium alloy extrusions is placed 30 ℃ of organic solvent kerosene, kept the processing of deoiling 10 minutes;
S2: washing: will place mobile water to wash at normal temperatures through the aluminium alloy extrusions that step S1 finishes dealing with 5 minutes, wherein the pH value of water is 7;
S3: differential arc oxidation: it comprises following two sub-steps:
S301: it is the oxidation trough of 5g/LNaOH that aluminium alloy extrusions is placed electrolyte, adopts the 110V constant current that aluminium alloy extrusions is carried out preliminary oxidation processes, and wherein aluminium alloy extrusions is negative electrode;
S302: adopt positive and negative bidirectional pulse that aluminium alloy extrusions is carried out oxidation, described positive negative sense voltage rises to final voltage and keeps constant later on, and wherein final voltage is 450V, pulse frequency 750Hz, dutycycle (1 dm
2) 8%, oxidization time 6 minutes, treatment temperature is 20 ℃;
S4: washing: will take out through the aluminium alloy extrusions that step S3 finishes dealing with, place mobile water to wash at normal temperatures 5 minutes, wherein the pH value of water is 7;
S5: electrophoresis: the aluminium alloy extrusions that washing is finished placed 50 ℃ of electrophoresis tank electrophoretic process 2 minutes, and wherein the voltage of electrophoretic process is 180V, and electric current is 200A;
S6: washing: will place mobile water to wash at normal temperatures through the aluminium alloy extrusions that step S2 finishes dealing with 5 minutes, wherein the pH value of water is 7;
S7: oven dry: place baking oven 80 ℃ of oven dry 30 minutes aluminium alloy extrusions.
[embodiment 3]
Aluminum alloy differential arc electrophoresis composite film, it comprises bottom 2 and coating 3, described bottom 2 is the ceramic membrane with the bottom of differential arc oxidation method before one deck of aluminium alloy extrusions 1 surface preparation is as electrophoresis, the electrocoating film of described coating 3 for having prepared at the aluminium alloy extrusions ceramic membrane surface with electrophoresis method.
The preparation technology of aluminum alloy differential arc electrophoresis composite film, it is characterized in that: it may further comprise the steps:
S1: deoil: aluminium alloy extrusions is placed 28 ℃ of organic solvent trichloro-ethylenes, kept the processing of deoiling 18 minutes;
S2: washing: will place mobile water to wash at normal temperatures through the aluminium alloy extrusions that step S1 finishes dealing with 4 minutes, wherein the pH value of water is 7;
S3: differential arc oxidation: it comprises following two sub-steps:
S301: it is the oxidation trough of 5g/LNaOH that aluminium alloy extrusions is placed electrolyte, adopts the 110V constant current that aluminium alloy extrusions is carried out preliminary oxidation processes, and wherein aluminium alloy extrusions is negative electrode;
S302: adopt positive and negative bidirectional pulse that aluminium alloy extrusions is carried out oxidation, described positive negative sense voltage rises to final voltage and keeps constant later on, and wherein final voltage is 450V, pulse frequency 750Hz, dutycycle (1 dm
2) 8%, oxidization time 5 minutes, treatment temperature is 23 ℃;
S4: washing: will take out through the aluminium alloy extrusions that step S3 finishes dealing with, place mobile water to wash at normal temperatures 4 minutes, wherein the pH value of water is 7;
S5: electrophoresis: the aluminium alloy extrusions that washing is finished placed 33 ℃ of electrophoresis tank electrophoretic process 3 minutes, and wherein the voltage of electrophoretic process is 140V, and electric current is 500A;
S6: washing: will place mobile water to wash at normal temperatures through the aluminium alloy extrusions that step S2 finishes dealing with 4 minutes, wherein the pH value of water is 7;
S7: oven dry: place baking oven 73 ℃ of oven dry 45 minutes aluminium alloy extrusions.
Claims (4)
1. aluminum alloy differential arc electrophoresis composite film, it is characterized in that: it comprises bottom (2) and coating (3), described bottom (2) is the ceramic membrane with the bottom of differential arc oxidation method before one deck of aluminium alloy extrusions (1) surface preparation is as electrophoresis, the electrocoating film of described coating (3) for having prepared at the aluminium alloy extrusions ceramic membrane surface with electrophoresis method.
2. the preparation technology of aluminum alloy differential arc electrophoresis composite film as claimed in claim 1, it is characterized in that: it may further comprise the steps:
S1: deoil: aluminium alloy extrusions is placed 25～30 ℃ of organic solvents, kept the processing of deoiling 10～15 minutes;
S2: washing: will place mobile water to wash at normal temperatures through the aluminium alloy extrusions that step S1 finishes dealing with 3～5 minutes, wherein the pH value of water is 5～7;
S3: differential arc oxidation: it comprises following two sub-steps:
S301: aluminium alloy extrusions is placed oxidation trough electrolyte, adopt the 110V constant current that aluminium alloy extrusions is carried out preliminary oxidation processes, wherein aluminium alloy extrusions is negative electrode;
S302:: adopt positive and negative bidirectional pulse that aluminium alloy extrusions is carried out oxidation, described positive negative sense voltage rises to final voltage and keeps constant later on, and wherein final voltage is 450V, pulse frequency 750Hz, dutycycle (1 dm
2) 8%, oxidization time 4～6 minutes, treatment temperature is 20～50 ℃;
S4: washing: will take out through the aluminium alloy extrusions that step S3 finishes dealing with, place mobile water to wash at normal temperatures 3～5 minutes, wherein the pH value of water is 6～7;
S5: electrophoresis: the aluminium alloy extrusions that washing is finished placed 15～50 ℃ of electrophoresis tank electrophoretic process 2～4 minutes, and wherein the voltage of electrophoretic process is 100～180V, and electric current is 200～800A;
S6: washing: will place mobile water to wash at normal temperatures through the aluminium alloy extrusions that step S2 finishes dealing with 3～5 minutes, wherein the pH value of water is 6～7;
S7: oven dry: place baking oven 65～80 ℃ of oven dry 30～60 minutes aluminium alloy extrusions.
3. the preparation technology of aluminum alloy differential arc electrophoresis composite film according to claim 2, it is characterized in that: the organic solvent among the described step S1 is any one in gasoline, kerosene, the trichloro-ethylene.
4. the preparation technology of aluminum alloy differential arc electrophoresis composite film according to claim 2, it is characterized in that: the electrolyte in the oxidation trough among the described step S3 is 5g/LNaOH solution.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106086984A (en) * | 2016-08-23 | 2016-11-09 | 苏州库浩斯信息科技有限公司 | A kind of Microarc Oxidation of Al-mg Alloy method and electrolyte |
| CN106985475A (en) * | 2017-04-01 | 2017-07-28 | 苏州焕欣化工科技有限公司 | A kind of aluminium alloy nanometer electrophoresis composite film and its preparation technology |
| CN112458453A (en) * | 2020-11-24 | 2021-03-09 | 安徽盈锐优材科技有限公司 | High-bonding-strength ceramic insulating coating and preparation method thereof |
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| JP2003119540A (en) * | 2001-10-12 | 2003-04-23 | Showa Denko Kk | Aluminum alloy to be film-formed, aluminum alloy material superior in corrosion resistance and manufacturing method therefor |
| CN101376973A (en) * | 2007-08-28 | 2009-03-04 | 汉达精密电子(昆山)有限公司 | Vacuum sputtering and electrophoresis combined coating technology for processing micro-arc oxidation workpiece |
| CN101608332A (en) * | 2008-06-19 | 2009-12-23 | 深圳富泰宏精密工业有限公司 | Aluminium alloy of surface tool ceramic coating formed by micro-arc oxidation and preparation method thereof |
| CN101831684A (en) * | 2010-05-28 | 2010-09-15 | 河海大学常州校区 | Microarc-oxidation electrophoretic-coating composite processing method of surface of Q 235 steel part |
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| CN203172098U (en) * | 2013-03-27 | 2013-09-04 | 成都阳光铝制品有限公司 | Micro-arc electrophoresis composite membrane layer of aluminum alloy |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106086984A (en) * | 2016-08-23 | 2016-11-09 | 苏州库浩斯信息科技有限公司 | A kind of Microarc Oxidation of Al-mg Alloy method and electrolyte |
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| CN106985475A (en) * | 2017-04-01 | 2017-07-28 | 苏州焕欣化工科技有限公司 | A kind of aluminium alloy nanometer electrophoresis composite film and its preparation technology |
| CN112458453A (en) * | 2020-11-24 | 2021-03-09 | 安徽盈锐优材科技有限公司 | High-bonding-strength ceramic insulating coating and preparation method thereof |
| CN112458453B (en) * | 2020-11-24 | 2023-09-15 | 安徽盈锐优材科技有限公司 | Ceramic insulating coating with high bonding strength and preparation method thereof |
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Application publication date: 20130717 |