CN112442720A - Strong corrosion-proof aluminum alloy section bar anodic oxidation surface treatment process - Google Patents
Strong corrosion-proof aluminum alloy section bar anodic oxidation surface treatment process Download PDFInfo
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- CN112442720A CN112442720A CN202011325351.1A CN202011325351A CN112442720A CN 112442720 A CN112442720 A CN 112442720A CN 202011325351 A CN202011325351 A CN 202011325351A CN 112442720 A CN112442720 A CN 112442720A
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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
- C25D11/024—Anodisation under pulsed or modulated current or potential
-
- 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
-
- 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
Abstract
The invention belongs to the field of surface treatment of aluminum alloy sections, and particularly discloses a powerful anticorrosive aluminum alloy section anodic oxidation surface treatment process which comprises the steps of 1) impurity removal, 2) polishing, 3) alkali corrosion, 4) neutralization, 5) oxidation, 6) steam treatment, 7) hole sealing and 8) solidification, and has the advantages of mild conditions and reasonable cost, and a good anticorrosive effect is obtained for processing the aluminum alloy sections.
Description
Technical Field
The invention belongs to the field of surface treatment of aluminum alloy sections, and particularly discloses a powerful anticorrosive aluminum alloy section anodic oxidation surface treatment process.
Background
The section bar is an object with a certain geometric shape, which is made of materials with certain strength and toughness through processes of rolling, extruding, casting and the like. The material has certain appearance size, certain shape of cross section and certain mechanical and physical properties. The section bar can be used independently and can be further processed into other manufactured products, and is commonly used for building structures and manufacturing and installation. The mechanical engineer can select parameters such as specific shape, material quality, heat treatment state, mechanical property and the like of the section bar according to design requirements, then the section bar is divided according to specific size and shape requirements, and then the section bar is further processed or heat treated to meet the design precision requirements. The material, specification and size of the section can refer to corresponding national standards. The aluminum alloy section bar plays an important role in section bar products, and the aluminum alloy section bar plays an important role in national economy due to excellent processability, formability and recyclability, and can be used for producing various articles for daily use such as aluminum alloy doors and windows in daily life. However, if the common aluminum alloy is not added with cobalt, nickel or zirconium, or is smelted by a special smelting method, the corrosion resistance is poor, but if the elements or the special smelting method are added, the cost is greatly increased, the competitiveness in the civil market is not strong, and therefore, a process for performing corrosion prevention treatment on the surface of the aluminum alloy section is found, the cost is low, and the method is a moderate solution.
Disclosure of Invention
Aiming at the defects, the invention discloses a powerful anticorrosive aluminum alloy section bar anodic oxidation surface treatment process.
A powerful anticorrosive aluminum alloy profile anodic oxidation surface treatment process comprises the following steps:
1) impurity removal: removing grease, dirt and a natural oxidation film on the surface of the aluminum alloy section by using a cleaning solution, and then cleaning and drying;
2) polishing: polishing the surface of the aluminum alloy section by using abrasive paper to be smooth;
3) alkali corrosion: immersing the polished aluminum alloy section into a groove containing an alkali etching agent for etching for 45-90min, and controlling the temperature in the groove to be 60-70 ℃;
4) neutralizing, namely putting the aluminum alloy section subjected to alkali corrosion into a tank filled with organic acid for neutralization for 10-20min, and controlling the temperature in the tank to be 40-50 ℃;
5) and (3) oxidation: placing the aluminum alloy section subjected to neutralization treatment into an electroplating bath; adding the bath solution; the aluminum alloy section is connected with the anode of a power supply, and the bath solution is internally connected with the cathode of the power supply; applying a voltage 24-36V with a waveform of hard direct arc between the positive electrode and the negative electrode; the time is 20-30 min;
6) steam treatment: putting the oxidized aluminum alloy section into a closed space, and fumigating with water vapor for 20-30 min; controlling the steam temperature at 70-90 ℃;
7) hole sealing: placing the aluminum alloy section subjected to the steam treatment into a groove filled with hole sealing liquid, and sealing holes overnight;
8) and (3) curing: and baking and curing the aluminum alloy section subjected to hole sealing treatment at the baking and curing temperature of 190 ℃ and 210 ℃ for 40-80 min.
Further, in the anodic oxidation surface treatment process for the powerful corrosion-proof aluminum alloy section, the cleaning solution in the step 1 comprises the following components in percentage by weight:
further, in the anodic oxidation surface treatment process for the powerful corrosion-resistant aluminum alloy section, the alkaline etching agent in the step 3 comprises the following components in percentage by weight:
further, in the anodic oxidation surface treatment process for the powerful corrosion-proof aluminum alloy section, the organic acid in the step 4 is oxalic acid, and the concentration is 15%.
Further, in the anodic oxidation surface treatment process for the powerful corrosion-proof aluminum alloy section, the bath solution in the step 5 comprises the following components in percentage by weight:
further, in the anodic oxidation surface treatment process for the powerful corrosion-proof aluminum alloy section, the hole sealing liquid in the step 7 comprises the following components in percentage by weight:
further, the anodic oxidation surface treatment process for the powerful corrosion-proof aluminum alloy section comprises the following steps:
1) impurity removal: removing grease, dirt and a natural oxidation film on the surface of the aluminum alloy section by using a cleaning solution, and then cleaning and drying;
2) polishing: polishing the surface of the aluminum alloy section by using abrasive paper to be smooth;
3) alkali corrosion: immersing the polished aluminum alloy section into a groove containing an alkali etching agent for etching for 70min, and controlling the temperature in the groove to be 65 ℃;
4) neutralizing, namely putting the aluminum alloy section subjected to alkali corrosion into a tank filled with organic acid for neutralization for 15min, and controlling the temperature in the tank to be 45 ℃;
5) and (3) oxidation: placing the aluminum alloy section subjected to neutralization treatment into an electroplating bath; adding the bath solution; the aluminum alloy section is connected with the anode of a power supply, and the bath solution is internally connected with the cathode of the power supply; applying a voltage 30V with a waveform of a hard direct arc between the positive electrode and the negative electrode; the time is 25 min;
6) steam treatment: putting the oxidized aluminum alloy section into a closed space, and fumigating for 25min by using water vapor; controlling the steam temperature at 80 ℃;
7) hole sealing: placing the aluminum alloy section subjected to the steam treatment into a groove filled with hole sealing liquid, and sealing holes overnight;
8) and (3) curing: and baking and curing the aluminum alloy section subjected to hole sealing treatment at the baking and curing temperature of 200 ℃ for 60 min.
The technical scheme of the invention is as follows:
according to the technical scheme, the invention has the following beneficial effects: the invention provides a powerful anticorrosive aluminum alloy profile anodic oxidation surface treatment process which is short in process flow, low in equipment requirement, lower in treatment temperature than the traditional process, good in energy-saving and environment-friendly effects and reasonable in cost.
Furthermore, the neutralization step of the invention uses oxalic acid, which is environment-friendly and has little pollution, avoids the damage of hydrochloric acid to the environment and air in the traditional process, saves the treatment step of waste hydrochloric acid, and is green and environment-friendly.
Furthermore, in the anodic oxidation conditions used in the invention, a high-pressure and short-time oxidation scheme is used, measures such as steam treatment and hole sealing are used, the time is saved, the effect is good, and the prepared aluminum alloy section has strong corrosion resistance.
Detailed Description
The present invention is further illustrated by the following detailed description, wherein the processes are conventional unless otherwise specified, and the starting materials are commercially available from a public perspective unless otherwise specified.
Example 1
The rapid pressurizing injection molding process of the anti-static household appliance structural part is characterized by comprising the following steps of:
a powerful anticorrosive aluminum alloy profile anodic oxidation surface treatment process is characterized by comprising the following steps:
1) impurity removal: removing grease, dirt and a natural oxidation film on the surface of the aluminum alloy section by using a cleaning solution, and then cleaning and drying;
2) polishing: polishing the surface of the aluminum alloy section by using abrasive paper to be smooth;
3) alkali corrosion: immersing the polished aluminum alloy section into a groove containing an alkali etching agent for etching for 45min, and controlling the temperature in the groove at 60 ℃;
4) neutralizing, namely putting the aluminum alloy section subjected to alkali corrosion into a tank filled with organic acid for neutralization for 10min, and controlling the temperature in the tank to be 40 ℃;
5) and (3) oxidation: placing the aluminum alloy section subjected to neutralization treatment into an electroplating bath; adding the bath solution; the aluminum alloy section is connected with the anode of a power supply, and the bath solution is internally connected with the cathode of the power supply; applying a voltage 24V with a waveform of a hard direct arc between the positive electrode and the negative electrode; the time is 20 min;
6) steam treatment: putting the oxidized aluminum alloy section into a closed space, and fumigating for 20min by using water vapor; controlling the steam temperature at 70 ℃;
7) hole sealing: placing the aluminum alloy section subjected to the steam treatment into a groove filled with hole sealing liquid, and sealing holes overnight;
8) and (3) curing: and baking and curing the aluminum alloy section subjected to hole sealing treatment at 190 ℃ for 40 min.
The cleaning solution in the step 1 comprises the following components in percentage by weight:
the alkaline etching agent in the step 3 comprises the following components in percentage by weight:
the organic acid in the step 4 is oxalic acid, and the concentration is 15%.
The bath solution in the step 5 comprises the following components in percentage by weight:
the hole sealing liquid in the step 7 comprises the following components in percentage by weight:
example 2
A powerful anticorrosive aluminum alloy profile anodic oxidation surface treatment process comprises the following steps:
1) impurity removal: removing grease, dirt and a natural oxidation film on the surface of the aluminum alloy section by using a cleaning solution, and then cleaning and drying;
2) polishing: polishing the surface of the aluminum alloy section by using abrasive paper to be smooth;
3) alkali corrosion: immersing the polished aluminum alloy section into a groove containing an alkali etching agent for etching for 70min, and controlling the temperature in the groove to be 65 ℃;
4) neutralizing, namely putting the aluminum alloy section subjected to alkali corrosion into a tank filled with organic acid for neutralization for 15min, and controlling the temperature in the tank to be 45 ℃;
5) and (3) oxidation: placing the aluminum alloy section subjected to neutralization treatment into an electroplating bath; adding the bath solution; the aluminum alloy section is connected with the anode of a power supply, and the bath solution is internally connected with the cathode of the power supply; applying a voltage 30V with a waveform of a hard direct arc between the positive electrode and the negative electrode; the time is 25 min;
6) steam treatment: putting the oxidized aluminum alloy section into a closed space, and fumigating for 25min by using water vapor; controlling the steam temperature at 80 ℃;
7) hole sealing: placing the aluminum alloy section subjected to the steam treatment into a groove filled with hole sealing liquid, and sealing holes overnight;
8) and (3) curing: and baking and curing the aluminum alloy section subjected to hole sealing treatment at the baking and curing temperature of 200 ℃ for 60 min.
The cleaning solution in the step 1 comprises the following components in percentage by weight:
the alkaline etching agent in the step 3 comprises the following components in percentage by weight:
the organic acid in the step 4 is oxalic acid, and the concentration is 15%.
The bath solution in the step 5 comprises the following components in percentage by weight:
the hole sealing liquid in the step 7 comprises the following components in percentage by weight:
example 3
A powerful anticorrosive aluminum alloy profile anodic oxidation surface treatment process is characterized by comprising the following steps:
1) impurity removal: removing grease, dirt and a natural oxidation film on the surface of the aluminum alloy section by using a cleaning solution, and then cleaning and drying;
2) polishing: polishing the surface of the aluminum alloy section by using abrasive paper to be smooth;
3) alkali corrosion: immersing the polished aluminum alloy section into a groove containing an alkali etching agent for etching for 45-90min, and controlling the temperature in the groove at 70 ℃;
4) neutralizing, namely putting the aluminum alloy section subjected to alkali corrosion into a tank filled with organic acid for neutralization for 10-20min, and controlling the temperature in the tank to be 50 ℃;
5) and (3) oxidation: placing the aluminum alloy section subjected to neutralization treatment into an electroplating bath; adding the bath solution; the aluminum alloy section is connected with the anode of a power supply, and the bath solution is internally connected with the cathode of the power supply; applying a voltage 36V with a waveform of a hard direct arc between the positive electrode and the negative electrode; the time is 30 min;
6) steam treatment: putting the oxidized aluminum alloy section into a closed space, and fumigating for 30min by using water vapor; controlling the steam temperature at 90 ℃;
7) hole sealing: placing the aluminum alloy section subjected to the steam treatment into a groove filled with hole sealing liquid, and sealing holes overnight;
8) and (3) curing: and baking and curing the aluminum alloy section subjected to hole sealing treatment at the baking and curing temperature of 210 ℃ for 80 min.
The cleaning solution in the step 1 comprises the following components in percentage by weight:
the alkaline etching agent in the step 3 comprises the following components in percentage by weight:
the organic acid in the step 4 is oxalic acid, and the concentration is 15%.
The bath solution in the step 5 comprises the following components in percentage by weight:
the hole sealing liquid in the step 7 comprises the following components in percentage by weight:
test example
The aluminum alloy profiles obtained in examples 1 to 3 were subjected to a comparative test with the aluminum alloy profiles not subjected to the above-described anodizing treatment step 3 to 5, and the reference samples were subjected to a corrosion resistance test in a 5% sodium chloride neutral salt spray test, and the results are shown in table 1.
Table 1 corrosion resistance test.
| Example 1 | Example 2 | Example 3 | Comparative example | |
| Corrosion resistance time (h) | 1850 | 1900 | 1890 | 1400 |
According to the test data, the aluminum alloy section anodic oxidation surface treatment process is disclosed.
The above is only a preferred embodiment of the present invention, and the scope of the present invention should not be limited thereby, and all the simple equivalent changes and modifications made by the claims and the summary of the invention should be included in the protection scope of the present patent application.
Claims (7)
1. A powerful anticorrosive aluminum alloy profile anodic oxidation surface treatment process is characterized by comprising the following steps:
1) impurity removal: removing grease, dirt and a natural oxidation film on the surface of the aluminum alloy section by using a cleaning solution, and then cleaning and drying;
2) polishing: polishing the surface of the aluminum alloy section by using abrasive paper to be smooth;
3) alkali corrosion: immersing the polished aluminum alloy section into a groove containing an alkali etching agent for etching for 45-90min, and controlling the temperature in the groove to be 60-70 ℃;
4) neutralizing, namely putting the aluminum alloy section subjected to alkali corrosion into a tank filled with organic acid for neutralization for 10-20min, and controlling the temperature in the tank to be 40-50 ℃;
5) and (3) oxidation: placing the aluminum alloy section subjected to neutralization treatment into an electroplating bath; adding the bath solution; the aluminum alloy section is connected with the anode of a power supply, and the bath solution is internally connected with the cathode of the power supply; applying a voltage 24-36V with a waveform of hard direct arc between the positive electrode and the negative electrode; the time is 20-30 min;
6) steam treatment: putting the oxidized aluminum alloy section into a closed space, and fumigating with water vapor for 20-30 min; controlling the steam temperature at 70-90 ℃;
7) hole sealing: placing the aluminum alloy section subjected to the steam treatment into a groove filled with hole sealing liquid, and sealing holes overnight;
8) and (3) curing: and baking and curing the aluminum alloy section subjected to hole sealing treatment at the baking and curing temperature of 190 ℃ and 210 ℃ for 40-80 min.
2. The anodic oxidation surface treatment process for the powerful corrosion-proof aluminum alloy profile according to claim 1, wherein the cleaning solution in the step 1 comprises the following components in percentage by weight:
45 percent of water
Citric acid 25%
Ethylene diamine tetraacetic acid 15%
7 percent of dimethyl pyridine amine
Fatty acid polyoxyethylene ether 5%
Disodium hydrogen phosphate dodecahydrate 3%.
3. The anodic oxidation surface treatment process for the powerful corrosion-proof aluminum alloy profile according to claim 1, wherein the alkaline etching agent in the step 3 comprises the following components in percentage by weight:
60 percent of water
25 percent of potassium hydroxide
Sodium carbonate 5%
4 percent of urea phosphate
Tetrahydrofuran 3%
3% of cellulose ether.
4. The anodic oxidation surface treatment process for the powerful corrosion-proof aluminum alloy profile according to claim 1, wherein the organic acid in the step 4 is oxalic acid, and the concentration of the organic acid is 15%.
5. A powerful anticorrosive aluminum alloy profile anodizing surface treatment process according to claim 1, wherein the bath solution in the step 5 consists of the following components in percentage by weight:
90 percent of deionized water
Glycerol 5%
2 percent of sodium carbonate
Sodium metaaluminate 1.5%
Sodium xylene sulfonate 1%
0.5 percent of sodium tripolyphosphate.
6. The anodic oxidation surface treatment process for the powerful anticorrosive aluminum alloy profile according to claim 1, wherein the hole sealing liquid in the step 7 comprises the following components in percentage by weight:
80 percent of deionized water
Nitric acid 8%
5 percent of ammonium bifluoride
3 percent of polyacrylamide
3 percent of ethyl titanate
1% of phytic acid.
7. The anodic oxidation surface treatment process for the powerful corrosion-resistant aluminum alloy profile as claimed in any one of claims 1 to 6, comprising the steps of:
1) impurity removal: removing grease, dirt and a natural oxidation film on the surface of the aluminum alloy section by using a cleaning solution, and then cleaning and drying;
2) polishing: polishing the surface of the aluminum alloy section by using abrasive paper to be smooth;
3) alkali corrosion: immersing the polished aluminum alloy section into a groove containing an alkali etching agent for etching for 70min, and controlling the temperature in the groove to be 65 ℃;
4) neutralizing, namely putting the aluminum alloy section subjected to alkali corrosion into a tank filled with organic acid for neutralization for 15min, and controlling the temperature in the tank to be 45 ℃;
5) and (3) oxidation: placing the aluminum alloy section subjected to neutralization treatment into an electroplating bath; adding the bath solution; the aluminum alloy section is connected with the anode of a power supply, and the bath solution is internally connected with the cathode of the power supply; applying a voltage 30V with a waveform of a hard direct arc between the positive electrode and the negative electrode; the time is 25 min;
6) steam treatment: putting the oxidized aluminum alloy section into a closed space, and fumigating for 25min by using water vapor; controlling the steam temperature at 80 ℃;
7) hole sealing: placing the aluminum alloy section subjected to the steam treatment into a groove filled with hole sealing liquid, and sealing holes overnight;
8) and (3) curing: and baking and curing the aluminum alloy section subjected to hole sealing treatment at the baking and curing temperature of 200 ℃ for 60 min.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011325351.1A CN112442720A (en) | 2020-11-23 | 2020-11-23 | Strong corrosion-proof aluminum alloy section bar anodic oxidation surface treatment process |
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| CN202011325351.1A CN112442720A (en) | 2020-11-23 | 2020-11-23 | Strong corrosion-proof aluminum alloy section bar anodic oxidation surface treatment process |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113322470A (en) * | 2021-06-07 | 2021-08-31 | 湖北欣洁顺幕墙材料有限公司 | Surface treatment process and processing method of aluminum veneer for curtain wall |
| CN113481562A (en) * | 2021-07-30 | 2021-10-08 | 江苏库纳实业有限公司 | Surface treatment method of aluminum alloy door and window profile |
| CN115106724A (en) * | 2022-06-07 | 2022-09-27 | 扬州市银源汽车配件有限公司 | Integral forming processing method for special-shaped section bar of cabin door framework |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103374742A (en) * | 2012-04-18 | 2013-10-30 | 靖江先锋半导体科技有限公司 | Enhanced surface anodizing process for aluminum-magnesium alloy |
| CN107299347A (en) * | 2017-07-12 | 2017-10-27 | 合肥雅克丽新型建材有限公司 | A kind of process of surface treatment of door and window aluminium alloy extrusions |
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2020
- 2020-11-23 CN CN202011325351.1A patent/CN112442720A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103374742A (en) * | 2012-04-18 | 2013-10-30 | 靖江先锋半导体科技有限公司 | Enhanced surface anodizing process for aluminum-magnesium alloy |
| CN107299347A (en) * | 2017-07-12 | 2017-10-27 | 合肥雅克丽新型建材有限公司 | A kind of process of surface treatment of door and window aluminium alloy extrusions |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113322470A (en) * | 2021-06-07 | 2021-08-31 | 湖北欣洁顺幕墙材料有限公司 | Surface treatment process and processing method of aluminum veneer for curtain wall |
| CN113481562A (en) * | 2021-07-30 | 2021-10-08 | 江苏库纳实业有限公司 | Surface treatment method of aluminum alloy door and window profile |
| CN115106724A (en) * | 2022-06-07 | 2022-09-27 | 扬州市银源汽车配件有限公司 | Integral forming processing method for special-shaped section bar of cabin door framework |
| CN115106724B (en) * | 2022-06-07 | 2024-02-27 | 扬州市银源汽车配件有限公司 | Integral molding processing method for cabin door framework profiled bar |
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