Strong corrosion-proof aluminum alloy section bar anodic oxidation surface treatment process

文档序号：932499 发布日期：2021-03-05 浏览：8次中文

阅读说明：本技术 一种强力防腐的铝合金型材阳极氧化表面处理工艺 (Strong corrosion-proof aluminum alloy section bar anodic oxidation surface treatment process ) 是由汪宏成于 2020-11-23 设计创作，主要内容包括：本发明属于铝合金型材表面处理领域,具体公开了一种强力防腐的铝合金型材阳极氧化表面处理工艺,包括1)去杂质、2)打磨、3)碱腐蚀、4)中和、5)氧化、6)蒸汽处理、7)封孔、8)固化这些步骤,条件温和,成本合理,为加工铝合金型材取得了良好的防腐效果。(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.)

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.

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;

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 ℃;

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