CN111155156A - Surface treatment process for aluminum profile - Google Patents
Surface treatment process for aluminum profile Download PDFInfo
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- CN111155156A CN111155156A CN201911379443.5A CN201911379443A CN111155156A CN 111155156 A CN111155156 A CN 111155156A CN 201911379443 A CN201911379443 A CN 201911379443A CN 111155156 A CN111155156 A CN 111155156A
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- aluminum profile
- surface treatment
- aluminum
- treatment process
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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
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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
- C25D11/16—Pretreatment, e.g. desmutting
-
- 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
-
- 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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- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
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- Organic Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Abstract
The invention discloses a surface treatment process of an aluminum profile, which comprises the following steps: step a: extruding, aging and CNC processing the aluminum ingot to obtain an aluminum profile with a preset specification and size; step b: carrying out sand blasting treatment on the aluminum profile; step c: carrying out anodic oxidation treatment on the aluminum profile subjected to sand blasting treatment; step d: and spraying UV oil on the aluminum profile subjected to the anodic oxidation treatment. The surface treatment process of the aluminum profile can enable the aluminum profile to resist electrochemical corrosion in outdoor complex environment, has the aesthetic property of the aluminum profile, and is simple and reliable in process.
Description
Technical Field
The invention relates to the technical field of surface treatment of aluminum materials, in particular to a surface treatment process of an aluminum profile.
Background
Aluminum is the most widely used non-ferrous structural material in industry and has found a great deal of use in the aerospace, automotive, machinery, marine and chemical industries. The rapid development of industrial economy leads to increasing demands on aluminum profile structural members, and in order to improve the reliability and appearance quality of aluminum profiles, aluminum profiles are generally subjected to surface treatment. The existing aluminum profile surface treatment process generally adopts an anodic oxidation process, but surface material segregation is easy to occur in the aluminum profile, so that element distribution on the surface of the aluminum profile is changed, and obvious difference with the body property is caused, so that the quality of an oxide film on the surface of the anodic oxidation process has defects, and the aluminum profile is easy to corrode and form scattered spots in a complex environment, and the appearance and the reliability are seriously influenced.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide a surface treatment process of an aluminum profile, so as to solve the problems in the background art.
The purpose of the invention is realized by adopting the following technical scheme:
the surface treatment process of the aluminum profile comprises the following steps:
step a: extruding, aging and CNC processing the aluminum ingot to obtain an aluminum profile with a preset specification and size;
step b: carrying out sand blasting treatment on the aluminum profile;
step c: carrying out anodic oxidation treatment on the aluminum profile subjected to sand blasting treatment;
step d: and spraying UV oil on the aluminum profile subjected to the anodic oxidation treatment.
Further, in the step a: and (3) placing the aluminum ingot in a 1500T aluminum extruder with the temperature of the die being controlled at 500 ℃ with the temperature of 450 ℃, and the extrusion speed of the aluminum extruder being 10-20m/min for extrusion.
Further, in the step b: the Rockwell hardness of the sand is 60 +/-10 HRC, the particle size of the sand is 100-205 meshes, and the sand adopts ceramic sand.
Further, steps b1 and b2 are included between the steps b and c,
step b 1: degreasing the aluminum profile subjected to sand blasting;
step b 2: and (4) carrying out acid washing neutralization on the degreased aluminum profile.
Further, the components of the degreasing solution used in the degreasing treatment in the step b1 are as follows:
1-3g/L of sodium hydroxide, 32-40g/L of sodium carbonate and 45-60g/L of sodium pyrophosphate;
the temperature of the degreasing treatment in the step b1 is controlled between 60 ℃ and 70 ℃ and the time is 1 mm to 3 mm.
Further, the acid-washing solution in the step b2 is sulfuric acid-hydrogen peroxide solution; the pickling temperature is controlled between 24-26 ℃ and the pickling time is 04-0.6 min.
Further, steps c1 and c2 are included between the step c and the step d,
step c 1: dyeing;
step c 2: and (5) hole sealing treatment.
Further, in the step d: pre-baking the aluminum profile at 45-65 ℃ for 3-5min before spraying the UV oil to ensure that the aluminum profile is completely dried; spraying UV oil in a spraying room, wherein the relative humidity of the spraying room is controlled to be 70-85% RH, and the temperature of the spraying room is controlled to be 8-25 ℃.
Further, after spraying the UV oil, the aluminum profile was placed in a UV oven of 900-1200mJ/cm2 for curing.
Compared with the prior art, the invention has the beneficial effects that: the invention adds two technical means of sand blasting and UV oil spraying on the basis of the original anodic oxidation treatment process of the aluminum profile, and the specific process sequence is as follows: firstly, carrying out sand blasting treatment, then carrying out anodic oxidation treatment, and finally spraying UV oil; the processing steps and the processing sequence can enable the aluminum profile to resist electrochemical corrosion in an outdoor complex environment, and meanwhile, the aluminum profile has the aesthetic property and is simple and reliable in process.
Drawings
Fig. 1 is a flow chart of the surface treatment process of the aluminum profile of the invention.
Detailed Description
To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
As shown in fig. 1, a surface treatment process diagram of the aluminum profile of the present invention is shown, which at least comprises the following steps: extruding, aging and CNC processing the aluminum ingot to obtain an aluminum profile with a preset specification and size; step b: carrying out sand blasting treatment on the aluminum profile; step c: carrying out anodic oxidation treatment on the aluminum profile subjected to sand blasting treatment; step d: and spraying UV oil on the aluminum profile subjected to the anodic oxidation treatment. Specifically, in step a: and (3) placing the aluminum ingot in a 1500T aluminum extruder with the temperature of the die being controlled at 500 ℃ with the temperature of 450 ℃, and the extrusion speed of the aluminum extruder being 10-20m/min for extrusion.
The burr of aluminium alloy and the oxide film that exposes and form in the air can be got rid of in the sand blasting among the above-mentioned step, carry out anodic oxidation after deburring and oxide film and handle, can make anodic oxidation's effect better to make aluminium alloy anti electrochemical corrosion's effect better. And the sprayed UV oil can protect an oxide film formed by anodic oxidation treatment, further improve the electrochemical corrosion resistance of the oxide film, and the sprayed UV can also play a role in improving the attractiveness of the aluminum profile.
Preferably, in step b: the Rockwell hardness of the sand is 60 +/-10 HRC, the particle size of the sand is 100-205 meshes, and the sand adopts ceramic sand.
Preferably, steps b1 and b2 are further included between step b and step c, step b 1: degreasing the aluminum profile subjected to sand blasting; step b 2: and (4) carrying out acid washing neutralization on the degreased aluminum profile. Grease and other stains on the surface of the aluminum profile can be removed through degreasing treatment. And the degreasing liquid for degreasing can be neutralized by acid washing, so that the degreasing liquid is neutral in PH, and the subsequent influence on the aluminum profile is avoided. Specifically, the components of the degreasing solution used in the degreasing treatment in step b1 are as follows: 1-3g/L of sodium hydroxide, 32-40g/L of sodium carbonate and 45-60g/L of sodium pyrophosphate; the temperature of the degreasing treatment in the step b1 is controlled between 60 ℃ and 70 ℃ and the time is 1 mm to 3 mm.
Preferably, the acid-washed solution in step b2 is a sulfuric acid-hydrogen peroxide solution; the pickling temperature is controlled between 24-26 ℃ and the pickling time is 04-0.6 min.
Preferably, steps c1 and c2 are further included between step c and step d, and step c 1: dyeing; step c 2: and (5) hole sealing treatment. After hole sealing treatment, the surface of the aluminum profile becomes uniform and nonporous, and a compact oxide film is formed. The dye is deposited in the oxide film and cannot be wiped off, so that the dyeing effect is better, the oxide film after hole sealing treatment has no adsorbability, and pollution or early corrosion caused by harmful substance adsorption can be avoided, so that the performances of pollution prevention, corrosion resistance and the like of the anodic oxide film are improved.
Preferably, in step d: pre-baking the aluminum profile at 45-65 ℃ for 3-5min before spraying the UV oil to ensure that the aluminum profile is completely dried; spraying UV oil in a spraying room, wherein the relative humidity of the spraying room is controlled to be 70-85% RH, and the temperature of the spraying room is controlled to be 8-25 ℃. The drying effect of UV can be optimized under such circumstances.
Preferably, the aluminum profile is cured after being sprayed with the UV oil in a UV oven of 900-1200mJ/cm 2.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (9)
1. The surface treatment process of the aluminum profile is characterized by comprising the following steps of:
step a: extruding, aging and CNC processing the aluminum ingot to obtain an aluminum profile with a preset specification and size;
step b: carrying out sand blasting treatment on the aluminum profile;
step c: carrying out anodic oxidation treatment on the aluminum profile subjected to sand blasting treatment;
step d: and spraying UV oil on the aluminum profile subjected to the anodic oxidation treatment.
2. The surface treatment process of an aluminum profile as claimed in claim 1,
in the step a: and (3) placing the aluminum ingot in a 1500T aluminum extruder with the temperature of the die being controlled at 500 ℃ with the temperature of 450 ℃, and the extrusion speed of the aluminum extruder being 10-20m/min for extrusion.
3. The surface treatment process of the aluminum profile as claimed in claim 1, characterized in that,
in the step b: the Rockwell hardness of the sand is 60 +/-10 HRC, the particle size of the sand is 100-205 meshes, and the sand adopts ceramic sand.
4. The surface treatment process of the aluminum profile according to claim 1, further comprising steps b1 and b2 between the step b and the step c,
step b 1: degreasing the aluminum profile subjected to sand blasting;
step b 2: and (4) carrying out acid washing neutralization on the degreased aluminum profile.
5. The surface treatment process of the aluminum profile as claimed in claim 4, wherein,
the components of the degreasing solution adopted in the degreasing treatment in the step b1 are as follows:
1-3g/L of sodium hydroxide, 32-40g/L of sodium carbonate and 45-60g/L of sodium pyrophosphate;
the temperature of the degreasing treatment in the step b1 is controlled between 60 ℃ and 70 ℃ and the time is 1 mm to 3 mm.
6. The surface treatment process of an aluminum profile as claimed in claim 4,
the acid-washing solution in the step b2 is sulfuric acid-hydrogen peroxide solution; the pickling temperature is controlled between 24-26 ℃ and the pickling time is 04-0.6 min.
7. The surface treatment process of the aluminum profile as claimed in claim 1, further comprising steps c1 and c2 between the step c and the step d,
step c 1: dyeing;
step c 2: and (5) hole sealing treatment.
8. The surface treatment process of an aluminum profile as claimed in claim 1,
in the step d: pre-baking the aluminum profile at 45-65 ℃ for 3-5min before spraying the UV oil to ensure that the aluminum profile is completely dried; spraying UV oil in a spraying room, wherein the relative humidity of the spraying room is controlled to be 70-85% RH, and the temperature of the spraying room is controlled to be 8-25 ℃.
9. The surface treatment process for the aluminum profile as claimed in claim 8, wherein the aluminum profile is cured in a UV furnace of 900-1200mJ/cm2 after being sprayed with the UV oil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911379443.5A CN111155156A (en) | 2019-12-27 | 2019-12-27 | Surface treatment process for aluminum profile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911379443.5A CN111155156A (en) | 2019-12-27 | 2019-12-27 | Surface treatment process for aluminum profile |
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| Publication Number | Publication Date |
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| CN111155156A true CN111155156A (en) | 2020-05-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911379443.5A Pending CN111155156A (en) | 2019-12-27 | 2019-12-27 | Surface treatment process for aluminum profile |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113718311A (en) * | 2021-09-09 | 2021-11-30 | 广东兴发铝业有限公司 | Aluminum profile surface brightening treatment process |
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Application publication date: 20200515 |