CN112210810A - Processing technology of high-corrosion-resistance extinction electrophoresis aluminum profile - Google Patents
Processing technology of high-corrosion-resistance extinction electrophoresis aluminum profile Download PDFInfo
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- CN112210810A CN112210810A CN202011073431.2A CN202011073431A CN112210810A CN 112210810 A CN112210810 A CN 112210810A CN 202011073431 A CN202011073431 A CN 202011073431A CN 112210810 A CN112210810 A CN 112210810A
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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
- C25D13/04—Electrophoretic coating characterised by the process with organic material
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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
- C25D11/16—Pretreatment, e.g. desmutting
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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
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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
- C25D13/20—Pretreatment
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Abstract
The invention discloses a processing technology of a high corrosion-resistant extinction electrophoresis aluminum profile, which sequentially comprises the following steps: degreasing → first water washing → sulfuric acid anodizing → second water washing → third water washing → hot pure water washing → extinction electrophoresis → RO1 water washing → RO2 water washing → draining → solidification, and the high corrosion resistance extinction electrophoresis aluminum profile is obtained. According to the processing technology of the high corrosion resistance extinction electrophoresis aluminum profile, the specific extinction electrophoresis paint (extinction coating) is used for coating, and the extinction electrophoresis processing technology is adjusted and optimized, so that the aluminum profile has high corrosion resistance; on the other hand, the surface of the profile has a matte effect, so that the light pollution of the profile is reduced, and the attractiveness of the profile is improved.
Description
Technical Field
The invention relates to the field of aluminum alloy profiles, in particular to a processing technology of a high-corrosion-resistance extinction electrophoresis aluminum profile.
Background
The high-corrosion-resistance extinction electrophoresis aluminum alloy structural section has the advantages of light weight, high strength, corrosion resistance, good formability, cyclic utilization, great reduction in load, reduction in transportation cost and the like. The aluminum alloy lightweight structure can reduce the load in the case that the ground construction allows deep foundation driving. In high earthquake areas or environments with concentrated corrosive gases, the aluminum material is safer to use as a bearing structure, the aluminum-substituted steel has light weight and excellent corrosion resistance, the maintenance cost can be reduced and the light pollution (optical refraction) can be eliminated due to the fact that the aluminum-substituted steel is free of painting and rust removal, and the aluminum-substituted steel is invented in Japan and is mainly used and popularized in China. The extinction electrophoresis process produced in China is still in the exploration stage, so that extinction electrophoresis aluminum profiles are researched and developed, the national green construction development direction is met, and the development prospect is good.
In recent years, extinction electrophoresis is more and more popular among people due to the characteristics of better corrosion resistance and weather resistance, mild color, gorgeous appearance and the like, but the production process, raw materials and equipment of the extinction electrophoresis depend on import at present and are expensive.
The aluminum profile treated by extinction electrophoresis can cover fine flaws of the lower anodic oxide layer, improve the yield, has high-grade appearance and becomes the development direction of aluminum profile surface treatment. The first generation of electrophoretic coating aluminum profile is applied in the sixties of the twentieth century in Japan, then much effort is made to improve the surface performance and appearance of the aluminum profile coating, and the extinction electrophoretic coating aluminum profile is developed in the eighties, is developed and matured after the improvement and continuous popularization of more than twenty years, and the serial extinction type coating technology formed by companies such as Guanxi, Harni, Nippon and the like accounts for more than 70% of the market share at present. The aluminum profile electrophoretic coating technology in China starts from the eighties of the twentieth century, mainly introduces foreign absorption production lines and products, mainly adopts bright electrophoretic coating, and a delustering electrophoretic coating line is introduced by some manufacturers in recent years, so that the number of processed products is small. The extinction electrophoretic coating technology is also in the beginning stage in China from Japan, Guanxi.
The optical electrophoresis section is developed to be mature at the beginning of the 90 s in China and is widely applied to the fields of buildings and the like, but the optical electrophoresis section has certain light pollution because the surface glossiness is higher and the optical electrophoresis section has strong reflection effect on light. Especially on large-scale building door and window and curtain wall, the performance is more obvious. The extinction electrophoretic paint forms a low-gloss or matte coating on the surface of the profile, so that the light pollution is greatly reduced, and the high corrosion resistance of the coating is improved. Therefore, the method has great significance on stably producing the extinction section with high corrosion resistance, mechanical property and size meeting the requirements.
Compared with the advanced foreign level, the domestic extinction electrophoretic coating technology is still in the starting stage, so the work of the project mainly focuses on optimizing the extinction electrophoretic coating process of the aluminum profile to obtain the electrophoretic coating aluminum profile with excellent performance, and completes the research and industrialization of the extinction electrophoretic coating aluminum profile by combining the application requirements.
Disclosure of Invention
Based on the situation, the invention aims to provide a processing technology of a high-corrosion-resistance extinction electrophoresis aluminum profile. According to the processing technology of the high corrosion resistance extinction electrophoresis aluminum profile, the specific extinction electrophoresis paint (extinction coating) is used for coating, and the extinction electrophoresis processing technology is adjusted and optimized, so that the aluminum profile has high corrosion resistance; on the other hand, the surface of the profile has a matte effect, so that the light pollution of the profile is reduced, and the attractiveness of the profile is improved.
In order to solve the technical problems, the technical scheme provided by the invention is as follows:
a processing technology of a high corrosion resistance extinction electrophoresis aluminum profile sequentially comprises the following steps: degreasing → first water washing → sulfuric acid anodizing → second water washing → third water washing → hot pure water washing → extinction electrophoresis → RO1 water washing → RO2 water washing → draining → solidification, and the high corrosion resistance extinction electrophoresis aluminum profile is obtained.
Preferably, the processing technology of the high corrosion resistance extinction electrophoresis aluminum profile comprises the following steps:
1) degreasing: degreasing the aluminum profile at room temperature;
2) first water washing: carrying out primary water washing on the degreased aluminum profile at room temperature;
3) anodic oxidation of sulfuric acid: anodizing the aluminum profile subjected to the first washing, wherein an anodic oxide film is formed on the surface of the aluminum profile, and the thickness of the anodic oxide film is more than or equal to 9 um;
4) and (3) second water washing: carrying out secondary water washing on the aluminum profile subjected to sulfuric acid anodic oxidation at room temperature;
5) and (3) washing for the third time: carrying out third water washing on the aluminum profile subjected to the second water washing at room temperature;
6) washing with hot pure water: washing the aluminum profile subjected to the third washing with hot pure water, controlling the conductivity of the hot pure water to be less than 50 mu S/cm, controlling the temperature to be 70-80 ℃, and controlling the washing time to be 3-10 min;
7) pure water washing: carrying out pure water washing on the aluminum profile subjected to hot pure water washing at room temperature, controlling the conductivity of pure water to be less than 25 mu S/cm, and controlling the washing time to be 1-20 min;
8) extinction electrophoresis: carrying out electrophoresis treatment on the aluminum profile washed by pure water in a delustering coating to form a delustering electrophoretic paint coating film on the surface of the aluminum profile, wherein in the electrophoresis treatment process, the concentration of a solid component is 9.5-10.5%, the neutralization degree is 0.5-1.0, the pH value is 7.5-8.5, the conductivity is 650 and 950 mu S/cm, the temperature is 21-25 ℃, the working voltage is 150 +/-50V, and the time is 3-5 min;
9) RO1 water washing: carrying out RO1 water washing treatment on the aluminum profile subjected to extinction electrophoresis at room temperature, wherein in the RO1 water washing treatment process, the concentration of solid components is 0.5-1.5%, the PH value is 8.5-9.5, the conductivity is less than 250 mu S/cm, and the water washing time is 0.5-2 min;
10) RO2 water washing: carrying out RO2 water washing treatment on the aluminum profile washed by RO1 water at room temperature, wherein in the RO2 water washing treatment process, the concentration of solid components is 0.1-0.3%, the PH value is 8.5-9.5, the conductivity is less than 125 mu S/cm, and the water washing time is 0.5-2 min;
11) draining: draining the aluminum profile subjected to RO2 water washing at room temperature;
12) and (3) curing: and (3) carrying out curing treatment on the drained aluminum profile, wherein in the curing treatment process, the temperature is 160-200 ℃, and the heat preservation time is 20-30 minutes, so as to obtain the high-corrosion-resistance extinction electrophoresis aluminum profile.
According to the processing technology of the high corrosion resistance extinction electrophoresis aluminum profile, the specific extinction electrophoresis paint (extinction coating) is used for coating, and the extinction electrophoresis processing technology is adjusted and optimized, so that the aluminum profile has high corrosion resistance; on the other hand, the surface of the profile has a matte effect, so that the light pollution of the profile is reduced, and the attractiveness of the profile is improved.
The existing photoelectrophoresis aluminum profile is poor in corrosion resistance and has light pollution, and the requirement of a customer on high corrosion resistance and extinction performance cannot be met.
The processing technology of the high corrosion resistance extinction electrophoresis aluminum profile realizes the stability of the technology and the uniformity of the extinction electrophoresis coating by adjusting and optimizing the technological parameters of the extinction electrophoresis tank and optimizing the technological parameters of RO1 and RO2 rinsing tanks (RO1 and RO2 rinsing tanks are mainly used for the recovery of the extinction electrophoresis paint, and the electrophoresis coating is more uniformly coated by controlling and optimizing the parameters of solid content, PH value and conductivity, on the other hand, the extinction electrophoresis paint can be comprehensively recovered and reused), thereby obtaining the extinction electrophoresis aluminum profile with high corrosion resistance.
It should be noted that: the processing technology of the high corrosion-resistant extinction electrophoresis aluminum profile finds the optimal technological conditions meeting the requirements of various performances of the national GB/T5237.3 aluminum alloy building profile electrophoresis painting profile under the conditions of different voltages, pH values, solid content and bath solution temperature electrophoresis time.
Secondly, the processing technology of the high corrosion resistance extinction electrophoresis aluminum profile determines the electrophoresis technological process and technological conditions, including specific parameters such as pH value, temperature, solid content, voltage, current density, electrophoresis time, coating thickness and the like.
Compared with the prior electrophoresis technology, the processing technology of the high corrosion-resistant extinction electrophoresis aluminum profile optimizes the extinction electrophoresis processing technology, so that the coating is more uniform, and the corrosion resistance and weather resistance of the aluminum profile are improved.
Preferably, in the step 1), the degreasing time is 220-270 s.
Preferably, in the step 2), the time for the first water washing is 120-150 s.
Preferably, in the step 3), the aluminum profile after being washed by water is subjected to anodic oxidation by adopting a 95-98wt% sulfuric acid solution at the temperature of 19-22 ℃, an anodic oxide film is formed on the surface of the aluminum profile, and the thickness of the anodic oxide film is more than or equal to 9 um.
Preferably, in the step 4), the time for the second water washing is 185-205 s.
Preferably, in the step 5), the time of the third water washing is 85-105 s.
Preferably, in step 6), hot pure water washing: and washing the aluminum profile subjected to the third washing by hot pure water, controlling the conductivity of the hot pure water to be less than 50 mu S/cm, controlling the temperature to be 72-76 ℃, and controlling the washing time to be 5-8 min.
Preferably, in step 7), washing with pure water: and (3) carrying out pure water washing on the aluminum profile subjected to hot pure water washing at room temperature, wherein the conductivity of the pure water is controlled to be less than 25 mu S/cm, and the washing time is 12-15 min.
Preferably, the matt coating in step 8) consists of the following components: 26-30% of water-soluble polyacrylic resin, 11-14% of water-soluble polyurethane acrylate, 5-7% of water-soluble phenolic resin, 1.5-2.5% of matting powder, 2-3% of matting slurry, 6-9% of isopropanol, 4-5% of ethylene glycol n-butyl ether, 2-4% of butyl acetate, 1-2% of diisobutyl ketone, 1.5-2.5% of triethylamine and the balance of pure water.
Preferably, the matting agent is degussa OK 607.
Preferably, the extinction paste is Nippon Dynasty 818S.
Compared with the prior art, the invention has the following advantages and beneficial effects:
according to the processing technology of the high corrosion resistance extinction electrophoresis aluminum profile, the specific extinction electrophoresis paint (extinction coating) is used for coating, and the extinction electrophoresis processing technology is adjusted and optimized, so that the aluminum profile has high corrosion resistance; on the other hand, the surface of the profile has a matte effect, so that the light pollution of the profile is reduced, and the attractiveness of the profile is improved.
The existing photoelectrophoresis aluminum profile is poor in corrosion resistance and has light pollution, and the requirement of a customer on high corrosion resistance and extinction performance cannot be met.
The processing technology of the high corrosion resistance extinction electrophoresis aluminum profile realizes the stability of the technology and the uniformity of the extinction electrophoresis coating through the adjustment and optimization of technological parameters of the extinction electrophoresis tank and the optimization of technological parameters of RO1 and RO2 rinsing tanks (RO1 and RO2 rinsing tanks are mainly used for the recovery of the extinction electrophoresis paint, and the control and optimization of parameters of solid content, PH value and conductivity make the electrophoresis coating more uniformly coated, and on the other hand, the extinction electrophoresis paint can be comprehensively recovered and reused), thereby obtaining the extinction electrophoresis aluminum profile with high corrosion resistance.
It should be noted that: the processing technology of the high corrosion-resistant extinction electrophoresis aluminum profile finds the optimal technological conditions meeting the requirements of various performances of the national GB/T5237.3 aluminum alloy building profile electrophoresis painting profile under the conditions of different voltages, pH values, solid content and bath solution temperature electrophoresis time.
Secondly, the processing technology of the high corrosion resistance extinction electrophoresis aluminum profile determines the electrophoresis technological process and technological conditions, including specific parameters such as pH value, temperature, solid content, voltage, current density, electrophoresis time, coating thickness and the like.
Compared with the prior electrophoresis technology, the processing technology of the high corrosion-resistant extinction electrophoresis aluminum profile optimizes the extinction electrophoresis processing technology, so that the coating is more uniform, and the corrosion resistance and weather resistance of the aluminum profile are improved.
Detailed Description
In order that those skilled in the art will better understand the technical solutions of the present invention, the following description of the preferred embodiments of the present invention is provided in connection with specific examples, which should not be construed as limiting the present patent.
The test methods or test methods described in the following examples are conventional methods unless otherwise specified; the reagents and materials, unless otherwise indicated, are conventionally obtained commercially or prepared by conventional methods.
Example 1:
a processing technology of a high corrosion resistance extinction electrophoresis aluminum profile sequentially comprises the following steps: degreasing → first water washing → sulfuric acid anodizing → second water washing → third water washing → hot pure water washing → extinction electrophoresis → RO1 water washing → RO2 water washing → draining → solidification, and the high corrosion resistance extinction electrophoresis aluminum profile is obtained.
Preferably, the processing technology of the high corrosion resistance extinction electrophoresis aluminum profile comprises the following steps:
1) degreasing: degreasing the aluminum profile at room temperature;
2) first water washing: carrying out primary water washing on the degreased aluminum profile at room temperature;
3) anodic oxidation of sulfuric acid: anodizing the aluminum profile subjected to the first washing, wherein an anodic oxide film is formed on the surface of the aluminum profile, and the thickness of the anodic oxide film is more than or equal to 9 um;
4) and (3) second water washing: carrying out secondary water washing on the aluminum profile subjected to sulfuric acid anodic oxidation at room temperature;
5) and (3) washing for the third time: carrying out third water washing on the aluminum profile subjected to the second water washing at room temperature;
6) washing with hot pure water: washing the aluminum profile subjected to the third washing with hot pure water, controlling the conductivity of the hot pure water to be less than 50 mu S/cm, controlling the temperature to be 70-80 ℃, and controlling the washing time to be 3-10 min;
7) pure water washing: carrying out pure water washing on the aluminum profile subjected to hot pure water washing at room temperature, controlling the conductivity of pure water to be less than 25 mu S/cm, and controlling the washing time to be 1-20 min;
8) extinction electrophoresis: carrying out electrophoresis treatment on the aluminum profile washed by pure water in a delustering coating to form a delustering electrophoretic paint coating film on the surface of the aluminum profile, wherein in the electrophoresis treatment process, the concentration of a solid component is 9.5-10.5%, the neutralization degree is 0.5-1.0, the pH value is 7.5-8.5, the conductivity is 650 and 950 mu S/cm, the temperature is 21-25 ℃, the working voltage is 150 +/-50V, and the time is 3-5 min;
9) RO1 water washing: carrying out RO1 water washing treatment on the aluminum profile subjected to extinction electrophoresis at room temperature, wherein in the RO1 water washing treatment process, the concentration of solid components is 0.5-1.5%, the PH value is 8.5-9.5, the conductivity is less than 250 mu S/cm, and the water washing time is 0.5-2 min;
10) RO2 water washing: carrying out RO2 water washing treatment on the aluminum profile washed by RO1 water at room temperature, wherein in the RO2 water washing treatment process, the concentration of solid components is 0.1-0.3%, the PH value is 8.5-9.5, the conductivity is less than 125 mu S/cm, and the water washing time is 0.5-2 min;
11) draining: draining the aluminum profile subjected to RO2 water washing at room temperature;
12) and (3) curing: and (3) carrying out curing treatment on the drained aluminum profile, wherein in the curing treatment process, the temperature is 160-200 ℃, and the heat preservation time is 20-30 minutes, so as to obtain the high-corrosion-resistance extinction electrophoresis aluminum profile.
Preferably, in the step 1), the degreasing time is 220-270 s.
Preferably, in the step 2), the time for the first water washing is 120-150 s.
Preferably, in the step 3), the aluminum profile after being washed by water is subjected to anodic oxidation by adopting a 95-98wt% sulfuric acid solution at the temperature of 19-22 ℃, an anodic oxide film is formed on the surface of the aluminum profile, and the thickness of the anodic oxide film is more than or equal to 9 um.
Preferably, in the step 4), the time for the second water washing is 185-205 s.
Preferably, in the step 5), the time of the third water washing is 85-105 s.
Preferably, in step 6), hot pure water washing: and washing the aluminum profile subjected to the third washing by hot pure water, controlling the conductivity of the hot pure water to be less than 50 mu S/cm, controlling the temperature to be 72-76 ℃, and controlling the washing time to be 5-8 min.
Preferably, in step 7), washing with pure water: and (3) carrying out pure water washing on the aluminum profile subjected to hot pure water washing at room temperature, wherein the conductivity of the pure water is controlled to be less than 25 mu S/cm, and the washing time is 12-15 min.
Preferably, the matt coating in step 8) consists of the following components: 26-30% of water-soluble polyacrylic resin, 11-14% of water-soluble polyurethane acrylate, 5-7% of water-soluble phenolic resin, 1.5-2.5% of matting powder, 2-3% of matting slurry, 6-9% of isopropanol, 4-5% of ethylene glycol n-butyl ether, 2-4% of butyl acetate, 1-2% of diisobutyl ketone, 1.5-2.5% of triethylamine and the balance of pure water.
Preferably, the matting agent is degussa OK 607.
Preferably, the extinction paste is Nippon Dynasty 818S.
Example 2:
a processing technology of a high corrosion resistance extinction electrophoresis aluminum profile sequentially comprises the following steps: degreasing → first water washing → sulfuric acid anodizing → second water washing → third water washing → hot pure water washing → extinction electrophoresis → RO1 water washing → RO2 water washing → draining → solidification, and the high corrosion resistance extinction electrophoresis aluminum profile is obtained.
In this embodiment, the processing technology of the high corrosion resistance extinction electrophoresis aluminum profile comprises the following steps:
1) degreasing: degreasing the aluminum profile at room temperature;
2) first water washing: carrying out primary water washing on the degreased aluminum profile at room temperature;
3) anodic oxidation of sulfuric acid: carrying out anodic oxidation on the aluminum profile subjected to the first washing, wherein an anodic oxide film is formed on the surface of the aluminum profile, and the thickness of the anodic oxide film is 10 microns;
4) and (3) second water washing: carrying out secondary water washing on the aluminum profile subjected to sulfuric acid anodic oxidation at room temperature;
5) and (3) washing for the third time: carrying out third water washing on the aluminum profile subjected to the second water washing at room temperature;
6) washing with hot pure water: washing the aluminum profile subjected to the third washing with hot pure water, controlling the conductivity of the hot pure water to be 40 mu S/cm, controlling the temperature to be 70 ℃, and controlling the washing time to be 10 min;
7) pure water washing: carrying out pure water washing on the aluminum profile subjected to hot pure water washing at room temperature, controlling the conductivity of pure water to be 20 mu S/cm, and controlling the washing time to be 20 min;
8) extinction electrophoresis: carrying out electrophoresis treatment on the aluminum profile washed by pure water in an extinction coating to form an extinction electrophoresis paint coating film on the surface of the aluminum profile, wherein in the electrophoresis treatment process, the solid component concentration is 9.5%, the neutralization degree is 0.5, the pH value is 7.5, the conductivity is 650 mu S/cm, the temperature is 21 ℃, the working voltage is 200V, and the time is 5 min;
9) RO1 water washing: carrying out RO1 water washing treatment on the aluminum profile subjected to extinction electrophoresis at room temperature, wherein in the RO1 water washing treatment process, the concentration of solid components is 0.5%, the pH value is 8.5, the conductivity is 200 mu S/cm, and the water washing time is 2 min;
10) RO2 water washing: performing RO2 water washing treatment on the aluminum profile washed by RO1 water at room temperature, wherein in the RO2 water washing treatment process, the concentration of solid components is 0.1%, the PH value is 8.5, the conductivity is 90 mu S/cm, and the water washing time is 2 min;
11) draining: draining the aluminum profile subjected to RO2 water washing at room temperature;
12) and (3) curing: and (3) carrying out curing treatment on the drained aluminum profile, wherein in the curing treatment process, the temperature is 160 ℃, and the heat preservation time is 30 minutes, so as to obtain the high-corrosion-resistance extinction electrophoresis aluminum profile.
In this example, in step 1), the degreasing time was 220 s.
In this embodiment, in step 2), the time for the first water washing is 120 s.
In this embodiment, in step 3), the aluminum profile after being washed is anodized at 19 ℃ by using a 98wt% sulfuric acid solution, and an anodized film is formed on the surface of the aluminum profile, wherein the thickness of the anodized film is 10 μm.
In this embodiment, in step 4), the time for the second water washing is 185 s.
In this example, in step 5), the time for the third water washing was 85 s.
In this example, the matt coating in step 8) consists of the following components: 26% of water-soluble polyacrylic resin, 11% of water-soluble polyurethane acrylate, 5% of water-soluble phenolic resin, 1.5% of matting powder, 2% of matting slurry, 6% of isopropanol, 4% of ethylene glycol n-butyl ether, 2% of butyl acetate, 1% of diisobutyl ketone, 1.5% of triethylamine and the balance of pure water.
In this embodiment, the matting agent is degussa OK 607.
In this embodiment, the matt paste is Nippon university 818S.
Example 3:
a processing technology of a high corrosion resistance extinction electrophoresis aluminum profile sequentially comprises the following steps: degreasing → first water washing → sulfuric acid anodizing → second water washing → third water washing → hot pure water washing → extinction electrophoresis → RO1 water washing → RO2 water washing → draining → solidification, and the high corrosion resistance extinction electrophoresis aluminum profile is obtained.
In this embodiment, the processing technology of the high corrosion resistance extinction electrophoresis aluminum profile comprises the following steps:
1) degreasing: degreasing the aluminum profile at room temperature;
2) first water washing: carrying out primary water washing on the degreased aluminum profile at room temperature;
3) anodic oxidation of sulfuric acid: carrying out anodic oxidation on the aluminum profile subjected to the first washing, wherein an anodic oxide film is formed on the surface of the aluminum profile, and the thickness of the anodic oxide film is 10 microns;
4) and (3) second water washing: carrying out secondary water washing on the aluminum profile subjected to sulfuric acid anodic oxidation at room temperature;
5) and (3) washing for the third time: carrying out third water washing on the aluminum profile subjected to the second water washing at room temperature;
6) washing with hot pure water: washing the aluminum profile subjected to the third washing with hot pure water, controlling the conductivity of the hot pure water to be 35 mu S/cm, controlling the temperature to be 80 ℃, and controlling the washing time to be 3 min;
7) pure water washing: carrying out pure water washing on the aluminum profile subjected to hot pure water washing at room temperature, controlling the conductivity of pure water to be 15 mu S/cm, and controlling the washing time to be 12 min;
8) extinction electrophoresis: carrying out electrophoresis treatment on the aluminum profile washed by pure water in an extinction coating to form an extinction electrophoresis paint coating film on the surface of the aluminum profile, wherein in the electrophoresis treatment process, the concentration of a solid component is 10.5%, the neutralization degree is 1.0, the pH value is 8.5, the conductivity is 950 mu S/cm, the temperature is 25 ℃, the working voltage is 100V, and the time is 3 min;
9) RO1 water washing: carrying out RO1 water washing treatment on the aluminum profile subjected to extinction electrophoresis at room temperature, wherein in the RO1 water washing treatment process, the concentration of solid components is 1.5%, the pH value is 9.5, the conductivity is 230 mu S/cm, and the water washing time is 0.5 min;
10) RO2 water washing: performing RO2 water washing treatment on the aluminum profile washed by RO1 water at room temperature, wherein in the RO2 water washing treatment process, the solid component concentration is 0.3%, the PH value is 9.5, the conductivity is 110 mu S/cm, and the water washing time is 0.5 min;
11) draining: draining the aluminum profile subjected to RO2 water washing at room temperature;
12) and (3) curing: and (3) carrying out curing treatment on the drained aluminum profile, wherein in the curing treatment process, the temperature is 200 ℃, and the heat preservation time is 20 minutes, so as to obtain the high-corrosion-resistance extinction electrophoresis aluminum profile.
In this example, in step 1), the degreasing time was 270 s.
In this example, in step 2), the time for the first water washing was 150 seconds.
In this embodiment, in step 3), the aluminum profile after being washed is anodized at 22 ℃ by using a 95 wt% sulfuric acid solution, and an anodized film is formed on the surface of the aluminum profile, wherein the thickness of the anodized film is 10 μm.
In this embodiment, in step 4), the time for the second water washing is 205 s.
In this example, in step 5), the time for the third water washing was 105 seconds.
In this example, the matt coating in step 8) consists of the following components: 30% of water-soluble polyacrylic resin, 14% of water-soluble polyurethane acrylate, 7% of water-soluble phenolic resin, 2.5% of matting powder, 3% of matting slurry, 9% of isopropanol, 5% of ethylene glycol n-butyl ether, 4% of butyl acetate, 2% of diisobutyl ketone, 2.5% of triethylamine and the balance of pure water.
In this embodiment, the matting agent is degussa OK 607.
In this embodiment, the matt paste is Nippon university 818S.
Example 4:
a processing technology of a high corrosion resistance extinction electrophoresis aluminum profile sequentially comprises the following steps: degreasing → first water washing → sulfuric acid anodizing → second water washing → third water washing → hot pure water washing → extinction electrophoresis → RO1 water washing → RO2 water washing → draining → solidification, and the high corrosion resistance extinction electrophoresis aluminum profile is obtained.
In this embodiment, the processing technology of the high corrosion resistance extinction electrophoresis aluminum profile comprises the following steps:
1) degreasing: degreasing the aluminum profile at room temperature;
2) first water washing: carrying out primary water washing on the degreased aluminum profile at room temperature;
3) anodic oxidation of sulfuric acid: carrying out anodic oxidation on the aluminum profile subjected to the first washing, wherein an anodic oxide film is formed on the surface of the aluminum profile, and the thickness of the anodic oxide film is 10 microns;
4) and (3) second water washing: carrying out secondary water washing on the aluminum profile subjected to sulfuric acid anodic oxidation at room temperature;
5) and (3) washing for the third time: carrying out third water washing on the aluminum profile subjected to the second water washing at room temperature;
6) washing with hot pure water: washing the aluminum profile subjected to the third washing with hot pure water, controlling the conductivity of the hot pure water to be 30 mu S/cm, controlling the temperature to be 75 ℃, and controlling the washing time to be 7 min;
7) pure water washing: carrying out pure water washing on the aluminum profile subjected to hot pure water washing at room temperature, controlling the conductivity of pure water to be 15 mu S/cm, and controlling the washing time to be 14 min;
8) extinction electrophoresis: carrying out electrophoresis treatment on the aluminum profile washed by pure water in an extinction coating to form an extinction electrophoresis paint coating film on the surface of the aluminum profile, wherein in the electrophoresis treatment process, the concentration of solid components is 10%, the neutralization degree is 0.8, the pH value is 8, the conductivity is 800 mu S/cm, the temperature is 23 ℃, the working voltage is 150V, and the time is 4 min;
9) RO1 water washing: carrying out RO1 water washing treatment on the aluminum profile subjected to extinction electrophoresis at room temperature, wherein in the RO1 water washing treatment process, the concentration of solid components is 1%, the PH value is 9, the conductivity is 220 mu S/cm, and the water washing time is 1.5 min;
10) RO2 water washing: performing RO2 water washing treatment on the aluminum profile washed by RO1 water at room temperature, wherein in the RO2 water washing treatment process, the solid component concentration is 0.2%, the PH value is 9, the conductivity is 100 mu S/cm, and the water washing time is 1.5 min;
11) draining: draining the aluminum profile subjected to RO2 water washing at room temperature;
12) and (3) curing: and (3) carrying out curing treatment on the drained aluminum profile, wherein in the curing treatment process, the temperature is 180 ℃, and the heat preservation time is 25 minutes, so as to obtain the high-corrosion-resistance extinction electrophoresis aluminum profile.
In this example, in step 1), the degreasing time was 245 s.
In this embodiment, in step 2), the time for the first water washing is 135 s.
In this embodiment, in step 3), the aluminum profile after being washed is anodized at 21 ℃ by using a 97 wt% sulfuric acid solution, and an anodized film is formed on the surface of the aluminum profile, wherein the thickness of the anodized film is 10 μm.
In this embodiment, in step 4), the time for the second water washing is 195 seconds.
In this example, in step 5), the time for the third water washing was 95 seconds.
In this example, the matt coating in step 8) consists of the following components: 28% of water-soluble polyacrylic resin, 12.5% of water-soluble polyurethane acrylate, 6% of water-soluble phenolic resin, 2% of matting powder, 2.5% of matting slurry, 7.5% of isopropanol, 4.5% of ethylene glycol n-butyl ether, 3% of butyl acetate, 1.5% of diisobutyl ketone, 2% of triethylamine and the balance of pure water.
In this embodiment, the matting agent is degussa OK 607.
In this embodiment, the extinction paste is Nippon Dynasty 818S.
The performance of the high corrosion resistance extinction electrophoresis aluminum profile obtained by the processing technology of the high corrosion resistance extinction electrophoresis aluminum profile obtained in the embodiments 2 to 4 of the invention is tested, and the test results are shown in table 1.
TABLE 1
From the above table, the high corrosion resistance extinction electrophoresis aluminum profile obtained by the processing technology of the high corrosion resistance extinction electrophoresis aluminum profile has excellent corrosion resistance and weather resistance.
The above is only a preferred embodiment of the present invention, and it should be noted that the above preferred embodiment should not be considered as limiting the present invention, and the protection scope of the present invention should be subject to the scope defined by the claims. It will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the spirit and scope of the invention, and these modifications and adaptations should be considered within the scope of the invention.
Claims (10)
1. The processing technology of the high-corrosion-resistance extinction electrophoresis aluminum profile is characterized by sequentially carrying out the following steps of: degreasing → first water washing → sulfuric acid anodizing → second water washing → third water washing → hot pure water washing → extinction electrophoresis → RO1 water washing → RO2 water washing → draining → solidification, and the high corrosion resistance extinction electrophoresis aluminum profile is obtained.
2. The processing technology of the high corrosion-resistant extinction electrophoresis aluminum profile according to claim 1 is characterized by comprising the following steps of:
degreasing: degreasing the aluminum profile at room temperature;
first water washing: carrying out primary water washing on the degreased aluminum profile at room temperature;
anodic oxidation of sulfuric acid: anodizing the aluminum profile subjected to the first washing, wherein an anodic oxide film is formed on the surface of the aluminum profile, and the thickness of the anodic oxide film is more than or equal to 9 um;
and (3) second water washing: carrying out secondary water washing on the aluminum profile subjected to sulfuric acid anodic oxidation at room temperature;
and (3) washing for the third time: carrying out third water washing on the aluminum profile subjected to the second water washing at room temperature;
washing with hot pure water: washing the aluminum profile subjected to the third washing with hot pure water, controlling the conductivity of the hot pure water to be less than 50 mu S/cm, controlling the temperature to be 70-80 ℃, and controlling the washing time to be 3-10 min;
pure water washing: carrying out pure water washing on the aluminum profile subjected to hot pure water washing at room temperature, controlling the conductivity of pure water to be less than 25 mu S/cm, and controlling the washing time to be 1-20 min;
extinction electrophoresis: carrying out electrophoresis treatment on the aluminum profile washed by pure water in a delustering coating to form a delustering electrophoretic paint coating film on the surface of the aluminum profile, wherein in the electrophoresis treatment process, the concentration of a solid component is 9.5-10.5%, the neutralization degree is 0.5-1.0, the pH value is 7.5-8.5, the conductivity is 650 and 950 mu S/cm, the temperature is 21-25 ℃, the working voltage is 150 +/-50V, and the time is 3-5 min;
RO1 water washing: carrying out RO1 water washing treatment on the aluminum profile subjected to extinction electrophoresis at room temperature, wherein in the RO1 water washing treatment process, the concentration of solid components is 0.5-1.5%, the PH value is 8.5-9.5, the conductivity is less than 250 mu S/cm, and the water washing time is 0.5-2 min;
RO2 water washing: carrying out RO2 water washing treatment on the aluminum profile washed by RO1 water at room temperature, wherein in the RO2 water washing treatment process, the concentration of solid components is 0.1-0.3%, the PH value is 8.5-9.5, the conductivity is less than 125 mu S/cm, and the water washing time is 0.5-2 min;
draining: draining the aluminum profile subjected to RO2 water washing at room temperature;
and (3) curing: and (3) carrying out curing treatment on the drained aluminum profile, wherein in the curing treatment process, the temperature is 160-200 ℃, and the heat preservation time is 20-30 minutes, so as to obtain the high-corrosion-resistance extinction electrophoresis aluminum profile.
3. The processing technology of the high corrosion-resistant extinction electrophoresis aluminum profile as claimed in claim 2, wherein in the step 1), the degreasing time is 220-270 s.
4. The processing technology of the high corrosion resistance extinction electrophoresis aluminum profile as claimed in claim 2, wherein in the step 2), the time for the first water washing is 120-150 s.
5. The processing technology of the high corrosion-resistant extinction electrophoresis aluminum profile according to claim 2 is characterized in that in the step 3), the aluminum profile after being washed by water is subjected to anodic oxidation at 19-22 ℃ by adopting 95-98wt% of sulfuric acid solution, an anodic oxide film is formed on the surface of the aluminum profile, and the thickness of the anodic oxide film is more than or equal to 9 microns.
6. The processing technology of the high corrosion-resistant extinction electrophoresis aluminum profile as claimed in claim 2, wherein in the step 4), the time of the second water washing is 185-205 s;
in the step 5), the time of the third water washing is 85-105 s.
7. The processing technology of the high corrosion resistance extinction electrophoresis aluminum profile according to claim 2 is characterized in that in the step 6), hot pure water washing: and washing the aluminum profile subjected to the third washing by hot pure water, controlling the conductivity of the hot pure water to be less than 50 mu S/cm, controlling the temperature to be 72-76 ℃, and controlling the washing time to be 5-8 min.
8. The processing technology of the high corrosion-resistant extinction electrophoresis aluminum profile according to claim 2 is characterized in that in the step 7), pure water washing: and (3) carrying out pure water washing on the aluminum profile subjected to hot pure water washing at room temperature, wherein the conductivity of the pure water is controlled to be less than 25 mu S/cm, and the washing time is 12-15 min.
9. The processing technology of the high corrosion-resistant extinction electrophoresis aluminum profile according to the claim 2 is characterized in that the extinction coating in the step 8) consists of the following components: 26-30% of water-soluble polyacrylic resin, 11-14% of water-soluble polyurethane acrylate, 5-7% of water-soluble phenolic resin, 1.5-2.5% of matting powder, 2-3% of matting slurry, 6-9% of isopropanol, 4-5% of ethylene glycol n-butyl ether, 2-4% of butyl acetate, 1-2% of diisobutyl ketone, 1.5-2.5% of triethylamine and the balance of pure water.
10. The processing technology of the high corrosion-resistant extinction electrophoresis aluminum profile according to claim 9 is characterized in that the extinction powder is degussel OK 607;
the extinction paste is 818S Daoheng.
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