阅读说明：本技术 含铜抛光剂、铝型材及其抛光处理方法 (Copper-containing polishing agent, aluminum profile and polishing treatment method thereof ) 是由 刘国平 于 2020-12-16 设计创作，主要内容包括：本发明涉及一种含铜抛光剂、铝型材及其抛光处理方法。抛光剂用于铝型材表面预处理,以100重量份计,包括如下重量份数的成分：10-20份硝酸,0.005-0.02份硫酸铜,10-20份氟化氢铵,5-10氟硼酸,3-5份甘油,0.5-3份精糊和余量水。经过上述含铜抛光剂处理后,铝型材表面清洁光亮,而且整个抛光处理方法工艺设备简单、可处理形状复杂的工件,操作方便,使用成本低。(The invention relates to a copper-containing polishing agent, an aluminum profile and a polishing treatment method thereof. The polishing agent is used for surface pretreatment of the aluminum profile and comprises the following components in parts by weight based on 100 parts by weight: 10-20 parts of nitric acid, 0.005-0.02 part of copper sulfate, 10-20 parts of ammonium bifluoride, 5-10 parts of fluoroboric acid, 3-5 parts of glycerol, 0.5-3 parts of dextrin and the balance of water. After the copper-containing polishing agent is used for treating, the surface of the aluminum profile is clean and bright, and the whole polishing treatment method has the advantages of simple process equipment, capability of treating workpieces with complex shapes, convenience in operation and low use cost.)

1. The copper-containing polishing agent is characterized by comprising the following components in parts by weight based on 100 parts by weight: 10-20 parts of nitric acid, 0.005-0.02 part of copper sulfate, 10-20 parts of ammonium bifluoride, 5-10 parts of fluoroboric acid, 3-5 parts of glycerol, 0.5-3 parts of dextrin and the balance of water.

2. The copper-containing polishing composition according to claim 1 wherein the nitric acid is present in an amount of from 12 to 18 parts by weight.

3. The copper-containing polishing composition of claim 1 wherein the copper sulfate is present in an amount of 0.01 to 0.02 parts by weight.

4. The copper-containing polishing composition according to claim 1 wherein the weight fraction of ammonium bifluoride is from 12 to 18 parts.

5. The copper-containing polishing composition of claim 1 wherein the fluoroboric acid is present in an amount of from 6 to 8 parts by weight.

6. The copper-containing polishing composition according to claim 1 wherein the glycerin is present in an amount of 2 to 4 parts by weight.

7. The copper-containing polishing composition according to claim 1 wherein the weight fraction of said paste is from 1 to 2 parts.

8. An aluminum profile polishing treatment method comprises the following steps: formulating a copper-containing polishing agent according to any one of claims 1 to 7; and (3) immersing the aluminum profile into a polishing agent solution, performing treatment at preset time and temperature, washing the aluminum profile with water, and entering the next procedure.

9. The aluminum profile polishing treatment method as claimed in claim 1, wherein after polishing for a predetermined time of 0.5 to 1 minute, passivating again, and then washing with water to dry, the predetermined temperature is 60 to 100 ℃.

10. An aluminum profile, characterized in that the surface of the aluminum profile is polished by the aluminum profile polishing treatment method as set forth in claim 8.

Technical Field

The invention relates to the technical field of iron surface treatment, and particularly relates to a copper-containing polishing agent, an aluminum profile and a polishing treatment method thereof.

Background

In order to improve the surface properties or appearance of the product, the surface of the workpiece is usually treated. For example, surface treatment processes for stainless steel, zinc alloys, aluminum, and the like, and alloys thereof, are in great popularity. Furthermore, most workpieces are also subjected to a pretreatment, such as cleaning, desmutting, or degreasing, prior to surface treatment, and some metal workpieces are also subjected to a polishing treatment.

Generally, in the mechanical processing and electronic and electrical industries, aluminum profiles are usually subjected to cleaning and brightening treatment, namely polishing treatment. Conventional copper-containing polishing agents typically employ mechanical polishing or three-acid polishing, wherein mechanical polishing is poor for complex workpiece geometries and is prone to cracking and scratching. The triacid in the triacid polishing, namely concentrated nitric acid, concentrated sulfuric acid and concentrated phosphoric acid, reacts violently under the high-temperature condition, gas is volatilized greatly, and a large amount of NO can be generated_XGas is unsafe, has great harm to the environment and large energy consumption.

Disclosure of Invention

In view of the above, a copper-containing polishing agent with better physical appearance, higher mechanical properties, better corrosion resistance, easy cleaning, special effect generation, less odor and less energy consumption, a polishing treatment method for aluminum profiles and an aluminum profile prepared by polishing treatment are provided.

The copper-containing polishing agent comprises the following components in parts by weight based on 100 parts by weight: 10-20 parts of nitric acid, 0.005-0.02 part of copper sulfate, 10-20 parts of ammonium bifluoride, 5-10 parts of fluoroboric acid, 3-5 parts of glycerol, 0.5-3 parts of dextrin and the balance of water.

An aluminum profile polishing treatment method comprises the following steps: formulating a copper-containing polishing agent as described above; and soaking the aluminum profile into the polishing agent solution, and washing the aluminum profile after the aluminum profile is subjected to treatment at preset time and temperature.

And an aluminum profile, the surface of which is polished by the aluminum profile polishing treatment method.

After the copper-containing polishing agent is used for treating, the surface of the aluminum profile has high light reflectivity, and the defects of pitting corrosion, spots, white mist and the like are overcome, and the whole polishing treatment method has the advantages of simple process, small smell, convenience in operation and low use cost.

Detailed Description

The present invention will be described in detail with reference to specific examples.

The embodiment of the invention provides a copper-containing polishing agent, which is used for surface pretreatment of an aluminum profile and comprises the following components in parts by weight based on 100 parts by weight: 10-20 parts of nitric acid, 0.005-0.02 part of copper sulfate, 10-20 parts of ammonium bifluoride, 5-10 parts of fluoroboric acid, 3-5 parts of glycerol, 0.5-3 parts of dextrin and the balance of water.

Specifically, the weight part of the nitric acid is preferably 12 to 18 parts. The weight portion of the copper sulfate is preferably 0.01-0.02 part, the weight portion of the ammonium bifluoride is preferably 12-18 parts, and the weight portion of the fluoroboric acid is preferably 6-8 parts. The weight portion of the glycerin is preferably 2-4 parts, and the weight portion of the dextrin is preferably 1-2 parts.

In the chemical etching process, the microscopic projections on the metal surface are in solution and the dissolution rate is much greater than that of the microscopic depressions, resulting in a gradually leveled and smooth, shiny surface. The proportion of each component is controlled to be balanced, so that a better polishing effect is achieved. Nitric acid, ammonium bifluoride and fluoboric acid remove oxide scales and enable the surface of aluminum to react quickly, nitric acid increases oxidizability so as to inhibit corrosion pits, and glycerin enables the reaction to be uniform and consistent. The fining may reduce the reaction rate at the microscopic cavities. Copper sulfate can improve the reflectivity of aluminum or aluminum alloys.

The embodiment of the invention also provides an aluminum profile polishing treatment method, which comprises the following steps: formulating a copper-containing polishing agent as described above; and (3) immersing the aluminum profile into a polishing agent solution, washing the aluminum profile with water after a preset time treatment, and drying.

Specifically, the predetermined time is 0.5 to 1 minute. Further, after polishing, passivation or oxidation is performed, and then washing and drying are performed. During polishing treatment, the temperature is controlled at 60-100 ℃. Furthermore, pretreatment such as degreasing, degreasing and descaling is performed before polishing.

The embodiment of the invention also provides the aluminum profile, which is polished by the aluminum profile polishing method, so that the aluminum profile forms a clean and bright surface. After the copper-containing polishing agent is used for treating, the surface of the aluminum profile is clean, the light reflectivity is high, and the whole polishing treatment method is simple in process, convenient to operate and low in use cost. The aluminum profile is made of aluminum or aluminum alloy and is various profiles or workpieces.

Specifically, the following examples illustrate that, since the composition of the aluminum alloy greatly affects the surface brightness after chemical polishing, generally, the higher the purity of the aluminum, the better the polishing brightness, and the following examples are made of Al — Mg alloy with aluminum in a mass fraction of 99.99%.

Example 1

The following components are mixed according to the following parts by weight (the total weight is 100 parts by weight): 10 parts of nitric acid, 0.005 part of copper sulfate, 10 parts of ammonium bifluoride, 5 parts of fluoroboric acid, 3 parts of glycerol, 0.5 part of dextrin and the balance of water.

The treatment method comprises the following steps: preparing a copper-containing polishing agent; the aluminum profile is degreased and descaled in advance, then washed, and then the workpiece with a clean surface is immersed into a polishing agent solution at 85 ℃, and after 1 minute, washed and dried.

After the polishing agent solution is used for processing, the surface of a workpiece is observed, and the whole surface is clean and bright and has consistent color and no abnormity such as spots, white fog, pitting corrosion and the like. The specular reflectivity is more than 40%.

Example 2

The following components are mixed according to the following parts by weight (the total weight is 100 parts by weight): 13 parts of nitric acid, 0.01 part of copper sulfate, 13 parts of ammonium bifluoride, 7 parts of fluoroboric acid, 4 parts of glycerol, 1 part of dextrin and the balance of water.

The treatment method comprises the following steps: preparing a copper-containing polishing agent; the aluminum profile is degreased and descaled in advance, then washed, and then the workpiece with a clean surface is immersed into a polishing agent solution at 85 ℃, and after 1 minute, washed and dried.

After the copper-containing polishing agent solution is used for treating, the surface of a workpiece is observed, and the whole surface is clean and bright and has consistent color and no spots, white fog, pitting corrosion and other abnormalities. The specular reflectivity is more than 50%.

Example 3

The following components are mixed according to the following parts by weight (the total weight is 100 parts by weight): 17 parts of nitric acid, 0.015 part of copper sulfate, 17 parts of ammonium bifluoride, 8 parts of fluoroboric acid, 4 parts of glycerol, 2 parts of dextrin and the balance of water.

The treatment method comprises the following steps: preparing a polishing agent; the aluminum profile is degreased and descaled in advance, then washed, and then the workpiece with a clean surface is immersed into a polishing agent solution at 85 ℃, and after 1 minute, washed and dried.

After the copper-containing polishing agent solution is used for treating, the surface of a workpiece is observed, and the whole surface is clean and bright and has consistent color and no spots, white fog, pitting corrosion and other abnormalities. The specular reflectivity is more than 60%.

Example 4

The following components are mixed according to the following parts by weight (the total weight is 100 parts by weight): 20 parts of nitric acid, 0.02 part of copper sulfate, 20 parts of ammonium bifluoride, 10 parts of fluoroboric acid, 5 parts of glycerol, 3 parts of dextrin and the balance of water.

The treatment method comprises the following steps: preparing a copper-containing polishing agent; the aluminum profile is degreased and descaled in advance, then washed, and then the workpiece with a clean surface is immersed into a polishing agent solution at 85 ℃, and after 40 seconds, washed and dried.

After the polishing agent solution is used for processing, the surface of a workpiece is observed, and the whole surface is clean and bright and has consistent color and no abnormity such as spots, white fog, pitting corrosion and the like. The specular reflectivity is more than 80%.

It should be noted that the present invention is not limited to the above-mentioned embodiments, and other changes and modifications can be made by those skilled in the art according to the spirit of the present invention, and these changes and modifications made according to the spirit of the present invention should be included in the scope of the present invention as claimed.