WO2019006675A1

WO2019006675A1 - Polishing agent, aluminum alloy part and polishing process therefor

Info

Publication number: WO2019006675A1
Application number: PCT/CN2017/091742
Authority: WO
Inventors: 王饶玲
Original assignee: 深圳市恒兆智科技有限公司
Priority date: 2017-07-04
Filing date: 2017-07-04
Publication date: 2019-01-10

Abstract

A polishing agent, an aluminum alloy part and a polishing process therefor. The polishing agent is used for surface pretreatment of an aluminum alloy part and comprises the following components in parts by weight per 100 parts by weight of the polishing agent: 2-20 parts of nitric acid, 1-5 parts of hydrochloric acid, 1-5 parts of diamond micro powder, 0.1-0.5 parts of stearic acid, 0.1-0.6 parts of copper sulfate, 3-10 parts of polyvinyl alcohol and the balance of water. Processed with the above polishing agent, the surface of an aluminum alloy part is clean and bright, and the polishing process is simple, environmentally friendly, no escape of harmful gases, convenient to operate and low-cost.

Description

Polishing agent, aluminum alloy part and polishing treatment method thereof

[0001] The present invention relates to the field of iron surface treatment technology, and in particular, to a polishing agent, an aluminum alloy member, and a polishing treatment method thereof.

Background technique

[0002] In order to improve the surface properties or appearance of a product, the surface treatment technology of the workpiece is usually applied. For example, surface treatments for aluminum alloys, zinc alloys, steel and their alloys are well-established in a wide range of industries. Moreover, most workpieces require pre-treatment before surface treatment, for example, cleaning, decontamination and degreasing, and metal parts for certain applications need to be polished.

[0003] Generally in the mechanical processing and electrical and electronic industries, aluminum alloy and aluminum alloy alloys are commonly cleaned and polished, that is, polished. Conventional polishing agents generally use mechanical polishing or tri-acid polishing, in which mechanical polishing has a poor polishing effect on the complex geometry of the workpiece. The tri-acid in the tri-acid polishing is concentrated nitric acid, concentrated nitric acid, and concentrated phosphoric acid reacts violently under high temperature conditions. The gas volatilizes a lot, is unsafe and not environmentally friendly, and has a high risk of energy consumption.

technical problem

[0004] In view of the above, a safe and environmentally friendly polishing agent is provided, which is used at room temperature, has no odor, and has low energy consumption, and an aluminum alloy member polishing method and an aluminum alloy member obtained by polishing.

Problem solution

Technical solution

[0005] A polishing agent comprising, by weight, 100 parts by weight of the following components: 2-20 parts of nitric acid, 1-5 parts of hydrochloric acid, 1-5 parts of fine steel powder, 0.1-0.5 parts of stearic acid , 0.1-0.6 parts of copper sulfate, 3-10 parts of polyvinyl alcohol and the balance of water.

[0006] A method for polishing an aluminum alloy member, comprising the steps of: formulating a polishing agent as described above; immersing the aluminum alloy member in a polishing agent solution in a vibration machine or ultrasonic waves, and washing the aluminum after a predetermined daytime treatment Alloy parts.

[0007] Also, an aluminum alloy member whose surface is polished by the aluminum alloy member polishing treatment method as described above Advantageous effects of the invention

Beneficial effect

[0008] After the above polishing agent treatment, the surface of the aluminum alloy member is clean and bright, and the whole polishing treatment method is simple, safe, environmentally friendly, odorless, no harmful gas escapes, convenient to operate, and low in use cost.

Embodiments of the invention

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

[0010] Embodiments of the present invention provide a polishing agent for surface pretreatment of an aluminum alloy member, comprising 100 parts by weight, including the following parts by weight: 2-20 parts of nitric acid, 1-5 parts of hydrochloric acid, 1- 5 parts of fine steel powder, 0.1-0.5 parts of stearic acid, 0.1-0.6 parts of copper sulfate, 3-10 parts of polyvinyl alcohol and the balance of water.

[0011] Specifically, the parts by weight of the hydrochloric acid are preferably 2-4 parts by weight. The fine particle of the fine steel powder preferably has a particle size of 10 to 200 nm, a part by weight of 2 to 4 parts, a part by weight of the nitric acid is preferably 5 to 15 parts, and a part by weight of the stearic acid is preferably 0.2. -0.4 parts. The parts by weight of the copper sulfate are preferably 0.2 to 0.4 parts, and the parts by weight of the polyvinyl alcohol are preferably 5-8.

[0012] In the above polishing agent, a better polishing effect is achieved by controlling the balance of the respective distribution ratios. Polished with hydrochloric acid and nitric acid as acid, fine steel powder as abrasive, polyethylene glycol as dispersing agent, so that the fine powder of fine steel is evenly dispersed in the solution, stearic acid is used as a wetting agent, and the fine powder of wet steel is wetted. Copper sulfate is an additive that increases polishing efficiency.

[0013] An embodiment of the present invention further provides a method for polishing an aluminum alloy member, comprising the steps of: preparing a polishing agent as described above; immersing the aluminum alloy member in a polishing agent solution, after a predetermined daytime treatment, washing the aluminum Alloy parts, dry.

[0014] Specifically, the predetermined time is 1-15 minutes. Further, after polishing, it is passivated, then washed with water and dried. After polishing, the temperature is controlled at 20 ° C - 25 ° C, that is, polishing at room temperature. Further, pretreatment such as degreasing and degreasing is performed before polishing.

[0015] Embodiments of the present invention also provide an aluminum alloy member which is subjected to a polishing treatment by the aluminum alloy member polishing treatment method as described above, so that the aluminum alloy member forms a clean and bright surface. After the above polishing agent treatment, the surface of the aluminum alloy part is clean and bright, and the whole polishing treatment method is simple, safe, environmentally friendly and odorless. No harmful gas escapes, easy to operate, and low in cost of use.

Embodiment 1

[0017] The components are mixed in the following parts by weight (total amount of 100 parts by weight) including: 2 parts of nitric acid, 1 part of hydrochloric acid, 1 part of fine steel powder, 0.1 part of stearic acid, 0.1 part of copper sulfate, 3 parts Polyvinyl alcohol and the balance of water.

[0018] Treatment method: preparing a polishing agent; the aluminum alloy parts should be degreased and descaled, then washed, and then the treated aluminum alloy parts are immersed in the polishing agent solution, after ultrasonic treatment for 15 minutes, the aluminum alloy is washed. Pieces, repassivated, washed, dried.

[0019] After the above polishing agent solution is treated, the surface of the workpiece is observed, and the entire surface is clean and bright, the color is uniform, and there is no abnormality such as a print mark, and the brightness is increased by more than 15% than before polishing.

[0020] Example 2

[0021] The components are mixed in the following parts by weight (total amount of 100 parts by weight) including: 8 parts of nitric acid, 2 parts of hydrochloric acid, 2 parts of fine steel powder, 0.2 parts of stearic acid, 0.3 parts of copper sulfate, 5 parts Polyvinyl alcohol and the balance of water.

[0022] Treatment method: preparing a polishing agent; aluminum alloy parts should first remove oil and descaling, then wash, then immerse the treated aluminum alloy parts in the polishing agent solution, after ultrasonic treatment for 15 minutes, wash the aluminum alloy Pieces, repassivated, washed, dried.

[0023] After the above polishing agent solution is treated, the surface of the workpiece is observed, and the entire surface is clean and bright, the color is uniform, and there is no abnormality such as staining, and the brightness is increased by more than 20% before polishing.

[0024] Example 3

[0025] The components are mixed in the following parts by weight (total amount of 100 parts by weight) including: 14 parts of nitric acid, 3 parts of hydrochloric acid, 3 parts of fine steel powder, 0.4 parts of stearic acid, 0.4 parts of copper sulfate, 7 parts Polyvinyl alcohol and the balance of water.

[0026] Treatment method: preparing a polishing agent; the aluminum alloy parts should be degreased and descaled, then washed, and then the treated aluminum alloy parts are immersed in the polishing agent solution, after ultrasonic treatment for 10 minutes, the aluminum alloy is washed. Pieces, repassivated, washed, dried.

[0027] After the above polishing agent solution is treated, the surface of the workpiece is observed, and the entire surface is clean and bright, the color is uniform, and there is no abnormality such as a stain, and the brightness is increased by more than 40% before polishing.

Embodiment 4

[0029] The components are mixed in the following parts by weight (total amount of 100 parts by weight) including: 40 parts of nitric acid, 5 parts of hydrochloric acid, 5 parts of fine steel powder, 0.5 parts of stearic acid, 0.6 parts of copper sulfate, 10 parts Polyvinyl alcohol and the balance of water. [0030] Processing method: preparing a polishing agent; aluminum alloy parts should first remove oil and descaling, then wash, then immerse the treated aluminum alloy parts in the polishing agent solution, after ultrasonic treatment for 10 minutes, wash the aluminum alloy Pieces, repassivated, washed, dried.

[0031] After the above polishing agent solution is treated, the surface of the workpiece is observed, and the entire surface is clean and bright, the color is uniform, and there is no abnormality such as staining, and the brightness is increased by more than 40% before polishing.

[0032] It should be noted that the present invention is not limited to the above embodiments, and other changes may be made by those skilled in the art according to the inventive spirit of the present invention, and the changes according to the inventive spirit of the present invention should be It is intended to be included within the scope of the invention as claimed.

Claims

Claim

[Claim 1] A polishing agent comprising, by weight of 100 parts by weight, of the following components: 2-20 parts of nitric acid, 1-5 parts of hydrochloric acid, 1-5 parts of fine steel powder, 0.1 - 0.5 parts stearic acid, 0.1-0.6 parts of copper sulfate, 3-10 parts of polyvinyl alcohol and the balance water.

[Claim 2] The polishing agent according to claim 1, wherein the nitric acid has a weight fraction of 5-1

8 copies.

[Claim 3] The polishing agent according to claim 1, wherein the fine steel fine powder has a particle size distribution of 10-200 nm and a part by weight of 2-4 parts.

[Claim 4] The polishing agent according to claim 1, wherein the hydrochloric acid is in an amount of 2 to 4 parts by weight.

[Claim 5] The polishing agent according to claim 1, wherein the stearic acid has a weight fraction of 0

.2-0.4 parts.

[Claim 6] The polishing agent according to claim 1, wherein the copper sulfate has a weight fraction of 0

.2-0.4 parts.

[Claim 7] The polishing agent according to claim 1, wherein the polyvinyl alcohol has a weight fraction of 5-8 parts.

[Claim 8] A method for polishing an aluminum alloy member, comprising the steps of: formulating the polishing agent according to any one of claims 1 to 7; immersing the aluminum alloy member in a polishing agent solution, and performing predetermined daytime processing After that, wash the aluminum alloy parts and proceed to the next process.

[Claim 9] The method for polishing an aluminum alloy member according to claim 1, wherein after being polished, it is passivated and then washed with water, and the predetermined turn is 1 to 15 minutes.

[Claim 10] An aluminum alloy member, characterized in that the surface of the aluminum alloy member is polished by the aluminum alloy member polishing treatment method according to claim 8.