CN104562142A - Anodizing rose bengal electrophoresis process of aluminum alloy - Google Patents
Anodizing rose bengal electrophoresis process of aluminum alloy Download PDFInfo
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- CN104562142A CN104562142A CN201410782387.0A CN201410782387A CN104562142A CN 104562142 A CN104562142 A CN 104562142A CN 201410782387 A CN201410782387 A CN 201410782387A CN 104562142 A CN104562142 A CN 104562142A
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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
- C25D11/06—Anodisation of aluminium or alloys based thereon characterised by the electrolytes used
- C25D11/08—Anodisation of aluminium or alloys based thereon characterised by the electrolytes used containing inorganic acids
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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
- C25D11/22—Electrolytic after-treatment for colouring layers
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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
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- Application Of Or Painting With Fluid Materials (AREA)
Abstract
The invention discloses an anodizing rose bengal electrophoresis process of an aluminum alloy. The process which is best adapted to mass production comprises the following steps: (1) processing before anodizing, namely decontaminating and degreasing a hung aluminum profile in a tank solution in a cleaning tank, carrying out alkaline etching treatment on the aluminum profile in an alkaline tank, carrying out primary water washing and feeding into a neutralization tank for neutralizing, after the processing is completed, washing with water and feeding into a next step; (2) anodizing to produce an oxide film, namely anodizing the pre-processed aluminum profile in an anodizing tank solution, controlling the time according to the requirements of the anodized film and after the processing is completed, washing with water and feeding into a next step; (3) carrying out rose bengal electrolytic coloring, namely putting the anodized aluminum profile into a rose bengal electrolytic coloring tank for electrolytic coloring; and (4) carrying out electrophoresis curing. The rose bengal aluminum alloy obtained by the process has bright and even color, good corrosion resistance and weather resistance and optimum decorative effect and the process is simple in process and low in cost during the production process.
Description
Technical field
The present invention relates to a kind of aluminium alloy anode oxide process of surface treatment, particularly relate to the production technique of the rose-red electrophoresis of a kind of aluminium alloy anode oxide.
Background technology
Aluminium is strong especially to the chemical affinity of oxygen, in an atmosphere its total surface cover by layer oxide film, but natural alumite is very thin, and porosity is large, and physical strength is low, and against corrosion and wear resistance all can not meet etch-proof needs.Utilize electrochemical method, can make the quality oxide film of aluminium (or aluminium alloy) Surface Creation densification, and film is thicker, it all reads to reach tens to hundreds of micron, can the erosion resistance of increase rate effectively.In addition, because formed oxide film exists uniform space, therefore available organic dye polarity dyeing process, color stability after sealing, makes the application of aluminium more extensive, makes the electrochemical process of aluminium surface oxidation be called anodizing of aluminium like this.
Usual alumilite process surface colour aspect has several: integral colouring, electrolytic coloring, dyeing, and these are several paintedly has nothing in common with each other in production cost, and in surface decoration, color respectively has advantage.
But existing coloring process poor stability, cost are high, and aberration is large.
Summary of the invention
The object of the present invention is to provide the rose-red electrophoresis process of a kind of aluminium alloy anode oxide, production aspect process stabilizing, cost are low, and aberration is little, and have the advantages such as weather-proof, heat-resisting, light fastness is high, and uniform color is color gorgeous.
The object of the invention to solve the technical problems realizes by the following technical solutions.According to the rose-red electrophoresis process of a kind of aluminium alloy anode oxide that the present invention proposes, comprise the following steps:
The rose-red electrophoresis production technique of a kind of aluminium alloy anode oxide, comprises the following steps:
1) anodic oxidation pre-treatment: after the aluminium section bar hung up properly is carried out decontamination, oil removal treatment in the tank liquor of rinse bath, through alkaline etching process in alkali groove, enters neutralizing well neutralization, enters down operation after processing through washing after once washing;
2) anodic oxidation generates oxide film: section bar good for pre-treatment is carried out anodic oxidation treatment in anode oxidation groove liquid, according to the requirement period of anode oxide film, enters down operation after processing through washing;
3) rose-red electrolytic coloring: the section bar good through anodic oxidation is put into rose-red electrolytic coloring groove and carry out electrolytic coloring;
4) electrophoresis solidification: by lustful section bar electrophoresis in electrophoresis chamber, be then cured process.
Further, step 1) in, anodic oxidation pre-treatment, successively by rinse bath, alkali groove and neutralizing well, its tank liquor consists of: comprise
Rinse bath: brightening agent comprises phosphoric acid 50%, hydrofluoric acid 30%, surface-active ion 5%, excess water, 90-150 grams per liter,
Alkali groove: caustic soda, 40-50 grams per liter, treatment time 2-4 minute;
Neutralizing well: sulfuric acid 160-200 grams per liter; Treatment time 2-4 minute.
Further, step 2) in, industrial sulphuric acid: 140-180 grams per liter; Temperature: 18-22 DEG C; Current density 1.2-1.5 peace/square decimeter; According to the requirement period of anode oxide film, after processing, enter down operation through 2-3 washing; This process operations has to pass through energising, is direct-current machine, and Surface of profile and tank liquor are reacted and generates a kind of netted oxide film, what thickness required according to section bar coexists between 5-15um.
Further, step 3) in, copper sulfate 8-9 grams per liter, mantoquita tinting material LW-22:8-9 grams per liter, sulfuric acid: 18-25 grams per liter, temperature 20 ± 2 DEG C, voltage 12-18 lies prostrate, the time: 2-3 minute.
Further, step 4) in, electrophoresis chamber tank liquor composition is: electrocoating paint solid content: 3.5-4.5 grams per liter, PH:7.5-8.5, acid number: 3.0-4.0, amine value: 2.0-3.5, specific conductivity: 350-1000S/M; Electrophoresis solidifies, electrophoresis: specific conductivity: 350-1000, electrocoating paint solid content: 3.5-4.5 grams per liter, PH:7.5-8.5, acid number: 3.0-4.0, amine value: 2.0-3.5; Solidification: temperature 180-200 DEG C, insulation 20-30 minute, enters lower operation and unloads frame packaging after processing.
Electrophoresis solidification main purpose is filled up by netted oxide film, and making aluminum alloy surface more smooth, is that aluminium alloy has better erosion resistance, longer service life.
Further, described surface-active ion is aliphatic acid polyethenoxy ether.
By technique scheme, the advantage that the present invention has and beneficial effect are:
The rose-red electrophoresis process of aluminium alloy anode oxide of the present invention is the technique adapting to most produce in batches, and the rose-red aluminium alloy of present invention process, evenly bright-colored, aberration is little, solidity to corrosion and good weatherability, and decorative effect is best, reduces production cost.
This rose-red electrophoretic effects is good, weather-proof, heat-resisting, light fastness is high, and cost is low, and uniform color coloured silk is gorgeous, is suitable for batch production, can be used for decoration, building, industrial aluminium.Lower than other staining method process stabilizing, cost in production, aberration is little very large advantage.
Embodiment
The rose-red painted electrophoresis process of aluminium alloy anode oxide of the present invention is mainly through following four steps:
1, blank is added, carries out added according to anode oxidation coloration material, guarantees that conduction is good, anodic oxidation pre-treatment;
Pre-treatment: oil removing: brightening agent (acidity) 90-150 grams per liter, normal temperature lower treatment time 1-3 minute; Alkaline etching: caustic soda 40-50 grams per liter, temperature 45-55 DEG C, treatment time 2-4 minute; Neutralization: industrial sulphuric acid 160-200 grams per liter, normal temperature, treatment time 2-4 minute.Next road oxidation is carried out after pincers material.
Brightening agent in degreasing tank mainly processes the greasy dirt that front operation blank band is come, and obtains bright and clean aluminium shape surface; Mainly removed the mechanical line of Surface of profile by alkaline etching operation, increase Surface of profile glossiness.
2, anodic oxidation generates oxide film:
Industrial sulphuric acid: 140-180 grams per liter; Temperature: 18-22 DEG C; Current density 1.2-1.5 peace/square decimeter, oxidization time 15-30 minute, oxide film can reach more than 5 films and can carry out painted.
3, painted front washing, rose-red electrolytic coloring;
Have acid not wash clean in rear fenestra can not to carry out painted because being oxidized, so the washing of this procedure must be tight, oxidation after washing will through three roads washings, and per pass washing will want 1-2 minute in tank;
Rose-red electrolytic coloring: copper sulfate 8-9 grams per liter, mantoquita tinting material LW-22:8-9 grams per liter, sulfuric acid: 18-25 grams per liter, temperature 20 ± 2 DEG C, voltage 12-18 lies prostrate, the time: 2-3 minute.This operation is the most important thing among invention, cardinal principle is when aluminium alloy is after anodic oxidation oxidation generation is not less than the oxide film of 8um, mantoquita tinting material LW-22 will be absorbed in oxidation fenestra, can not only have complementary color and can also play certain sealing of hole effect.
The solidification of next process electrophoresis is entered after painted.
4, electrophoresis solidification, finished product undercarriage is packed.
Electrocoating paint solid content: 3.5-4.5 grams per liter, PH:7.5-8.5, acid number: 3.0-4.0, amine value: 2.0-3.5, specific conductivity: 350-1000S/M; Electrophoresis solidifies, electrophoresis: specific conductivity: 350-1000, electrocoating paint solid content: 3.5-4.5 grams per liter, PH:7.5-8.5, acid number: 3.0-4.0, amine value: 2.0-3.5; Solidification: temperature 180-200 DEG C, insulation 20-30 minute.Enter lower operation after processing and unload frame packaging.
Claims (6)
1. the rose-red electrophoresis production technique of aluminium alloy anode oxide, is characterized in that, comprise the following steps:
1) anodic oxidation pre-treatment: after the aluminium section bar hung up properly is carried out decontamination, oil removal treatment in the tank liquor of rinse bath, through alkaline etching process in alkali groove, enters neutralizing well neutralization, enters down operation after processing through washing after once washing;
2) anodic oxidation generates oxide film: section bar good for pre-treatment is carried out anodic oxidation treatment in anode oxidation groove liquid, according to the requirement period of anode oxide film, enters down operation after processing through washing;
3) rose-red electrolytic coloring: the section bar good through anodic oxidation is put into rose-red electrolytic coloring groove and carry out electrolytic coloring;
4) electrophoresis solidification: by lustful section bar electrophoresis in electrophoresis chamber, be then cured process.
2. the rose-red electrophoresis process of aluminium alloy anode oxide according to claim 1, is characterized in that: step 1) in, anodic oxidation pre-treatment, successively by rinse bath, alkali groove and neutralizing well, its tank liquor consists of: comprise
Rinse bath: brightening agent comprises phosphoric acid 50%, hydrofluoric acid 30%, surface-active ion 5%, excess water, 90-150 grams per liter,
Alkali groove: caustic soda, 40-50 grams per liter, treatment time 2-4 minute;
Neutralizing well: sulfuric acid 160-200 grams per liter; Treatment time 2-4 minute.
3. the rose-red electrophoresis process of aluminium alloy anode oxide according to claim 2, is characterized in that: described surface-active ion is aliphatic acid polyethenoxy ether.
4. the rose-red electrophoresis process of aluminium alloy anode oxide according to claim 1, is characterized in that: step 2) in, industrial sulphuric acid: 140-180 grams per liter; Temperature: 18-22 DEG C; Current density 1.2-1.5 peace/square decimeter; According to the requirement period of anode oxide film, after processing, enter down operation through 2-3 washing; This process operations has to pass through energising, is direct-current machine, and Surface of profile and tank liquor are reacted and generates a kind of netted oxide film, what thickness required according to section bar coexists between 5-15um.
5. the rose-red electrophoresis process of aluminium alloy anode oxide according to claim 1, is characterized in that: step 3) in, copper sulfate 8-9 grams per liter, mantoquita tinting material LW-22:8-9 grams per liter, sulfuric acid: 18-25 grams per liter, temperature 20 ± 2 DEG C, voltage 12-18 lies prostrate, the time: 2-3 minute.
6. the rose-red electrophoresis process of aluminium alloy anode oxide according to claim 1, it is characterized in that: step 4) in, electrophoresis chamber tank liquor composition is: electrocoating paint solid content: 3.5-4.5 grams per liter, PH:7.5-8.5, acid number: 3.0-4.0, amine value: 2.0-3.5, specific conductivity: 350-1000S/M; Electrophoresis solidifies, electrophoresis: specific conductivity: 350-1000, electrocoating paint solid content: 3.5-4.5 grams per liter, PH:7.5-8.5, acid number: 3.0-4.0, amine value: 2.0-3.5; Solidification: temperature 180-200 DEG C, insulation 20-30 minute.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107119306A (en) * | 2017-04-26 | 2017-09-01 | 苏州罗普斯金铝业股份有限公司 | A kind of production technology of electrophoretic coating aluminium section bar |
| CN108315796A (en) * | 2018-04-04 | 2018-07-24 | 广东新合铝业新兴有限公司 | A kind of aluminium alloy jade porcelain surface anodization electrophoresis process |
| CN109056027A (en) * | 2018-09-30 | 2018-12-21 | 佛山市海化表面处理科技有限公司 | A kind of oxidation aluminium film mantoquita electrolytic coloring production technology |
| CN111690971A (en) * | 2020-06-19 | 2020-09-22 | 山东华建铝业集团有限公司 | Aluminum alloy soft light electrophoresis surface treatment production process |
| CN111996568A (en) * | 2020-07-21 | 2020-11-27 | 常熟恒富昱光电有限公司 | Processing method for improving surface appearance quality of aluminum structural member |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107119306A (en) * | 2017-04-26 | 2017-09-01 | 苏州罗普斯金铝业股份有限公司 | A kind of production technology of electrophoretic coating aluminium section bar |
| CN108315796A (en) * | 2018-04-04 | 2018-07-24 | 广东新合铝业新兴有限公司 | A kind of aluminium alloy jade porcelain surface anodization electrophoresis process |
| CN109056027A (en) * | 2018-09-30 | 2018-12-21 | 佛山市海化表面处理科技有限公司 | A kind of oxidation aluminium film mantoquita electrolytic coloring production technology |
| CN109056027B (en) * | 2018-09-30 | 2020-08-04 | 佛山市海化表面处理科技有限公司 | Electrolytic coloring production process for aluminum profile anodic oxide film copper salt |
| CN111690971A (en) * | 2020-06-19 | 2020-09-22 | 山东华建铝业集团有限公司 | Aluminum alloy soft light electrophoresis surface treatment production process |
| CN111996568A (en) * | 2020-07-21 | 2020-11-27 | 常熟恒富昱光电有限公司 | Processing method for improving surface appearance quality of aluminum structural member |
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