阅读说明：本技术 一种铝合金型材表面处理工艺 (Surface treatment process for aluminum alloy profile ) 是由 王杰超 于 2019-11-20 设计创作，主要内容包括：本发明公开了一种铝合金型材表面处理工艺,包括如下步骤：1)浸泡；2)刷洗；3)脱脂；4)水洗；5)酸洗；6)表调；7)磷化；8)再水洗；9)静电喷涂。本发明采用特定的表面处理工艺,使得铝合金型材具有优异的耐酸碱性、耐腐蚀性、耐磨性、抗氧化性及电绝缘性等。(The invention discloses a surface treatment process of an aluminum alloy profile, which comprises the following steps: 1) soaking; 2) brushing and washing; 3) degreasing; 4) washing with water; 5) acid washing; 6) adjusting the table; 7) phosphorization; 8) washing with water; 9) and (4) electrostatic spraying. The invention adopts a specific surface treatment process, so that the aluminum alloy section has excellent acid and alkali resistance, corrosion resistance, wear resistance, oxidation resistance, electric insulation property and the like.)

1. The surface treatment process of the aluminum alloy profile is characterized by comprising the following steps of:

1) soaking: soaking the aluminum section in clear water with the water temperature of 55-65 ℃ for 5-10 minutes;

2) brushing: then taking out the soaked aluminum profile, brushing the surface of the aluminum profile by using a hairbrush and simultaneously washing the aluminum profile by using clear water;

3) degreasing: putting an aluminum profile into degreasing agent tank liquid at the temperature of 40-45 ℃, soaking for 3-5 minutes, continuously stirring the degreasing agent, and then taking out the aluminum profile, wherein the degreasing agent comprises 5-8 wt% of sodium carbonate, 10-20 wt% of sodium phosphate, 3-5 wt% of surfactant and the balance of water;

4) washing with water: washing the aluminum profile taken out of the degreasing agent by using clear water until the degreasing agent is completely washed away;

5) acid washing: then, putting the aluminum profile after being washed into 10 wt% of dilute sulfuric acid pickling solution for soaking for 2-4 minutes, heating the pickling solution to 40-55 ℃ while soaking, and continuously stirring;

6) and (4) table adjustment: soaking the aluminum profile after acid washing in a passivation solution for 2-5 minutes, and continuously stirring the passivation solution, wherein the passivation solution comprises the following components in percentage by weight: 5-10% of formic acid, 1-3% of hydrofluoric acid, 5-10% of sodium fluorozirconate, 3-6% of potassium tungstate, 1-5% of potassium phytate, 2-4% of organic corrosion inhibitor and the balance of water;

7) phosphorization: placing the aluminum profile subjected to surface adjustment into phosphating solution to be soaked for 5-10 minutes, and setting the temperature of the phosphating solution to be 40-50 ℃ while soaking;

8) and (4) washing with water again: washing the passivated aluminum profile with overflow water, taking out the aluminum profile and drying the aluminum profile in the air;

9) electrostatic spraying: drying the passivated aluminum alloy section, uniformly spraying the enhanced coating on the surface of the passivation film by adopting an electrostatic spraying technology, wherein the thickness of the coating is 60-80 mu m, and curing the baking varnish at the temperature of 170-185 ℃ until the surface is dried.

2. The surface treatment process of an aluminum alloy profile as recited in claim 1, wherein the reinforced coating comprises the following components in percentage by weight: 23-27% of zirconium nitride powder, 18-20% of boron carbide powder, 1-3% of silane coupling agent, 18-20% of polyvinyl chloride and 30-40% of cross-linked polyesteramide.

Technical Field

The invention relates to a surface treatment process of an aluminum alloy profile.

Background

Aluminum alloy sections are a non-ferrous metal structural material which is most widely applied in industry, and are widely applied in the fields of aviation, aerospace, automobiles, mechanical manufacturing, ships, construction, decoration, chemical industry and the like. Aluminum is a metal material with extremely active chemical properties, can be naturally oxidized in air, forms an aluminum oxide protective film on the surface of the aluminum material, and blocks oxygen from contacting with internal aluminum metal, but the aluminum oxide is an amphoteric compound, has extremely poor acid and alkali resistance, can be dissolved under the acid and alkali conditions, loses the protection effect, and needs to be subjected to surface treatment to overcome the defects.

Disclosure of Invention

The technical problems to be solved by the invention are as follows: the aluminum alloy section surface treatment process is provided for overcoming the defects in the prior art, so as to solve the problems.

The technical problem solved by the invention can be realized by adopting the following technical scheme:

the surface treatment process of the aluminum alloy profile is characterized by comprising the following steps of:

1) soaking: soaking the aluminum section in clear water with the water temperature of 55-65 ℃ for 5-10 minutes;

2) brushing: then taking out the soaked aluminum profile, brushing the surface of the aluminum profile by using a hairbrush and simultaneously washing the aluminum profile by using clear water;

3) degreasing: putting an aluminum profile into degreasing agent tank liquid at the temperature of 40-45 ℃, soaking for 3-5 minutes, continuously stirring the degreasing agent, and then taking out the aluminum profile, wherein the degreasing agent comprises 5-8 wt% of sodium carbonate, 10-20 wt% of sodium phosphate, 3-5 wt% of surfactant and the balance of water;

4) washing with water: washing the aluminum profile taken out of the degreasing agent by using clear water until the degreasing agent is completely washed away;

5) acid washing: then, putting the aluminum profile after being washed into 10 wt% of dilute sulfuric acid pickling solution for soaking for 2-4 minutes, heating the pickling solution to 40-55 ℃ while soaking, and continuously stirring;

6) and (4) table adjustment: soaking the aluminum profile after acid washing in a passivation solution for 2-5 minutes, and continuously stirring the passivation solution, wherein the passivation solution comprises the following components in percentage by weight: 5-10% of formic acid, 1-3% of hydrofluoric acid, 5-10% of sodium fluorozirconate, 3-6% of potassium tungstate, 1-5% of potassium phytate, 2-4% of organic corrosion inhibitor and the balance of water;

7) phosphorization: placing the aluminum profile subjected to surface adjustment into phosphating solution to be soaked for 5-10 minutes, and setting the temperature of the phosphating solution to be 40-50 ℃ while soaking;

8) and (4) washing with water again: washing the passivated aluminum profile with overflow water, taking out the aluminum profile and drying the aluminum profile in the air;

9) electrostatic spraying: drying the passivated aluminum alloy section, uniformly spraying the enhanced coating on the surface of the passivation film by adopting an electrostatic spraying technology, wherein the thickness of the coating is 60-80 mu m, and curing the baking varnish at the temperature of 170-185 ℃ until the surface is dried.

In a preferred embodiment of the invention, the reinforcing coating consists of the following components in percentage by weight: 23-27% of zirconium nitride powder, 18-20% of boron carbide powder, 1-3% of silane coupling agent, 18-20% of polyvinyl chloride and 30-40% of cross-linked polyesteramide.

Due to the adoption of the technical scheme, the aluminum alloy section has excellent acid and alkali resistance, corrosion resistance, wear resistance, oxidation resistance, electric insulation property and the like by adopting a specific surface treatment process.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further explained below.