An additive for stainless steel polishing liquid and a polishing method

Abstract

The application discloses an additive for a stainless steel polishing liquid and a polishing method, and belongs to the technical field of stainless steel polishing liquids, and particularly relates to a stainless steel polishing process for electronic components. The additive for the stainless steel polishing liquid comprises 40-60 grams / liter of hexamethylenetetramine, 130-160 grams / liter of polyethylene glycol, 40-60 grams / liter of dimethyl silicone oil, 40-60 grams / liter of sodium dodecyl diphenyl ether disulfonate, and the rest is water. When used, the surface treatment additive is added into the polishing liquid containing nitric acid to prepare the polishing liquid containing the surface treatment additive, the adding amount of the surface treatment additive in the polishing liquid is 15-20 ML / L, the prepared additive is added into the polishing liquid according to the proportion, the polishing liquid is heated to 90-110 DEG C, the stainless steel pressure sensor base is put into the polishing liquid for polishing for 10-25 seconds, and thus the glossy metal surface can be obtained, and the damage to the glass part on the stainless steel pressure sensor base in the polishing process can be avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of stainless steel polishing liquid, and particularly relates to a stainless steel polishing process for electronic components. BACKGROUND

[0002] The existing electronic components with stainless steel, such as a stainless steel pressure sensor, often need to be polished on the surface of the stainless steel during the manufacturing process. After the base of the stainless steel pressure sensor is sintered at high temperature, the surface has oxides and nitrides, and the appearance is gray and black and has no luster. Such products need to remove the oxides and nitrides on the surface and keep the appearance smooth to be used in the next step. However, the existing polishing liquid for the oxides and nitrides on the surface of the stainless steel often contains a large amount of nitric acid. When the polishing liquid is used to process the base of the stainless steel pressure sensor, a large amount of yellow smoke is generated, which seriously damages the working environment of the workers and affects the health of the workers. If a processing agent without nitric acid is used, the base of the stainless steel pressure sensor will have no luster. SUMMARY

[0003] In order to solve the above technical problems, the present application provides an additive for a stainless steel polishing liquid, which comprises 40-60 g / L of hexamethylenetetramine, 130-160 g / L of polyethylene glycol, 40-60 g / L of dimethyl silicone oil, 40-60 g / L of sodium dodecyl diphenyl ether disulfonate, and the balance of water. The present application has found that other additives can also reduce smoke and improve polishing effect, but the viscosity is relatively large, and the base of the stainless steel pressure sensor after polishing is difficult to clean. In order to solve this problem, the present application has found that the additive for the stainless steel polishing liquid can reduce the viscosity to a reasonable level, so that the cleaning difficulty of the base of the stainless steel pressure sensor after polishing is greatly reduced.

[0004] Further, the additive for the stainless steel polishing liquid is added to the polishing liquid to prepare the polishing liquid containing the additive for the surface treatment of the present application.

[0005] Preferably, the additive for the surface treatment of the present application is added to the polishing liquid in an amount of 15-20 ML / L in consideration of the use cost and polishing effect.

[0006] Further, the additive for the surface treatment of the present application is specially used to polish the base of the stainless steel pressure sensor after sintering in the production process. Therefore, the polishing liquid containing the additive for the surface treatment is preferably used to polish the base of the stainless steel pressure sensor.

[0007] Further, because the application has obvious ability to inhibit smoke and enhance polishing effect for polishing liquid containing nitric acid, the polishing liquid is the polishing liquid containing nitric acid.

[0008] Further, because the application has obvious ability to inhibit smoke and enhance polishing effect for polishing liquid containing nitric acid, the polishing liquid is the polishing liquid containing nitric acid.

[0009] Further, the specific polishing method of the application additive and the polishing liquid is as follows:

[0010] First, the polishing liquid is prepared according to the components, and then the prepared additive is added to the polishing liquid in proportion. After heating to 90-110 degrees, the stainless steel pressure sensor base is put into the polishing liquid for polishing, so that a shiny metal surface can be obtained while avoiding damage to the glass parts on the stainless steel pressure sensor base during polishing.

[0011] The inventor found in the experiment that the polishing time of the stainless steel pressure sensor base in the polishing liquid with the additive is generally 10-25 seconds, which can remove surface oxides and nitrides and make the base have a shiny surface. In daily production, the standard for successful polishing is whether the surface oxides and nitrides are completely removed and whether the polished base surface is smooth. These two indicators can be judged by the visual and tactile sense of the staff, without the need for additional detection instruments. Therefore, the applicant is not easy to design experiments, and therefore the applicant cannot provide specific detection standards and detection results under the existing conditions. Therefore, as a preferred, the polishing time of the stainless steel pressure sensor base is 10-25 seconds.

[0012] The inventor found in the experimental process that although the polishing effect is good by using the application, a small part of the polishing is still unqualified, and the inventor found in the experiment that the stainless steel pressure sensor base is first treated with potassium permanganate, and then put into the polishing liquid added with the additive of the application for polishing treatment, which can basically be polished successfully, and the polishing efficiency can be further improved. Therefore, in order to further improve the qualified rate and the polishing efficiency, as preferred, the stainless steel pressure sensor base is first treated with potassium permanganate, and then put into the polishing liquid added with the additive of the application for polishing treatment. The method for treating the stainless steel pressure sensor base with potassium permanganate is to cook the stainless steel pressure sensor base in a potassium permanganate solution for 40-60 minutes, and as preferred, sodium hydroxide can be added to the potassium permanganate solution. Beneficial effects

[0013] The application can quickly polish the stainless steel pressure sensor base sintered at high temperature within 10-25 seconds.

[0014] The additive of the application can greatly reduce the use amount of nitric acid in the polishing liquid, so as to further reduce the generation of smoke.

[0015] The viscosity of the additive of the application is at a reasonable level, so that the cleaning difficulty of the polished stainless steel pressure sensor base can be greatly reduced. DETAILED DESCRIPTION

[0016] In order to make the purpose, technical scheme and advantages of the present application clearer, the technical scheme of the present application will be described in detail below. Obviously, the described embodiments are only some of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the present application.

[0017] Embodiment 1, an additive for stainless steel polishing liquid, comprising: methenamine 40-60 grams per liter, polyethylene glycol 130-160 grams per liter, dimethyl silicone oil 40-60 grams per liter, sodium dodecyl diphenyl ether disulfonate 40-60 grams per liter, and the balance is water. The additive has good smoke inhibition and improves the polishing effect, and the viscosity is at a reasonable level, so that the cleaning difficulty of the polished stainless steel pressure sensor base can be greatly reduced.

[0018] A polishing liquid used in cooperation with the additive of the application, the components of the polishing liquid are as follows: sulfuric acid 180-240 ML per liter, nitric acid 35-50 ML per liter, hydrochloric acid 50-65 ML per liter, citric acid 90-110 grams per liter, sodium fluoride 1-3 grams per liter, and the balance is water.

[0019] In use, the surface treatment additive is added to the polishing liquid to prepare a polishing liquid containing the surface treatment additive of the application, and the surface treatment additive is added to the polishing liquid in an amount of 15-20 ML / L.

[0020] The prepared additive is then added to the polishing liquid in proportion, and the stainless steel pressure sensor base is placed in the polishing liquid for polishing for 10-25 seconds after being heated to 90-110 degrees, so that a shiny metal surface can be obtained while avoiding damage to the glass parts on the stainless steel pressure sensor base during polishing.

[0021] In addition, the application discloses the following technical solutions on the basis of the above embodiments.

[0022] Before polishing the stainless steel pressure sensor base, the stainless steel pressure sensor base is first treated with potassium permanganate to loosen the oxide scale, and then placed in the polishing liquid for polishing.

[0023] The additive for the stainless steel polishing liquid and the polishing liquid matched with the additive of the application can be freely combined in the range disclosed in Embodiment 1 in terms of the specific additive amount of each component.

[0024] The above is only a specific embodiment of the application, but the protection scope of the application is not limited thereto, and any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the application, which should be covered within the protection scope of the application. Therefore, the protection scope of the application should be subject to the protection scope of the claims.

Claims

1. A polishing fluid for polishing stainless steel, characterized in that, The polishing solution has the following components: sulfuric acid 180-240 ML / L, nitric acid 35-50 ML / L, hydrochloric acid 50-65 ML / L, citric acid 90-110 g / L, sodium fluoride 1-3 g / L, surface treatment additive 15-20 ML / L, and the balance is water; The surface treatment additive components include: hexamethylenetetramine 40-60 g / L, polyethylene glycol 130-160 g / L, dimethyl silicone oil 40-60 g / L, sodium dodecyl diphenyl ether disulfonate 40-60 g / L, and the balance being water.

2. The polishing method for stainless steel polishing fluid according to claim 1, characterized in that, Surface treatment additives are added to the polishing slurry during use to prepare a polishing slurry containing surface treatment additives.

3. The polishing method for stainless steel polishing fluid according to claim 2, characterized in that, The polishing liquid with added surface treatment additives is used to polish the stainless steel pressure sensor base.

4. The polishing method for stainless steel polishing fluid according to claim 2, characterized in that, The specific polishing method is as follows: First, prepare the polishing solution according to the components, then add the prepared additives to the polishing solution in proportion. After heating to 90~110 degrees, put the stainless steel pressure sensor base into the polishing solution for polishing to obtain a shiny metal surface.

5. A polishing method for stainless steel polishing fluid according to claim 4, characterized in that, The polishing time for the stainless steel pressure sensor base is 10-25 seconds.

6. The polishing method for stainless steel polishing fluid according to claim 5, characterized in that, The stainless steel pressure sensor base is first treated with potassium permanganate, and then it is polished in a polishing solution with additives.