Polishing agent for improving nanometer surface of rivet electrical contact and treatment method

Abstract

The invention belongs to the field of surface treatment of rivet electrical contacts, and particularly relates to a polishing agent for improving the nanometer surface of a rivet electrical contact and a treatment method. The rivet electrical contact is soaked in a polishing agent formed by mixing potassium carbonate, phosphoric acid, oxalic acid, a detergent 6501, isopropanol, potassium sodium tartrate tetrahydrate and pure water, physical and chemical double grinding is generated on the surface of the rivet electrical contact through the synergistic effect of potassium carbonate, phosphoric acid and oxalic acid, and the rough polishing effect is achieved; and then the surface of the rivet electrical contact is lubricated, decontaminated and brightened by utilizing the synergistic effect of 6501, isopropanol and potassium sodium tartrate tetrahydrate, so that the nano surface effect with very high smoothness and cleanliness is achieved.

Description

Technical Field

[0001] The invention belongs to the field of surface treatment of rivet electrical contacts, and particularly relates to a polishing agent and a treatment method for improving the nano-surface of a rivet electrical contact. Background Art

[0002] The rapid development of the new energy vehicle industry has significantly increased material requirements for upstream industries. Among these, stricter requirements exist for the surface of rivet contacts in relays. Specifically, under 1000x electron microscope observation, no black specks containing silicon, iron, or aluminum are permitted. Any surface impurities on the contacts can disrupt their metal continuity, increasing contact resistance and heat generation, and even triggering arcing, contact welding, or failure, directly impacting circuit safety and vehicle reliability.

[0003] Through long-term research on the production process of electrical contacts, the inventors found that the main reason for the introduction of such black spots and foreign matter is that the rough polishing of rivet electrical contacts mainly adopts the physical rolling method, and the polishing material containing elements such as silicon / iron / aluminum and the rivet electrical contacts are subjected to high-speed chip cutting, resulting in dense small pits on the surface of the product. At the same time, some powder of the polishing material containing elements such as silicon / iron / aluminum is embedded in the pits, making it impossible to clean it in the subsequent process.

[0004] Therefore, there is an urgent need to develop a polishing agent that can achieve the rough polishing effect of existing polishing materials, and at the same time, the product after rough polishing can present a nano-surface with very high smoothness and cleanliness. Summary of the Invention

[0005] The purpose of the present invention is to overcome the shortcomings and deficiencies of the prior art and to provide a polishing agent and a treatment method for improving the nano-surface of rivet electrical contacts.

[0006] The technical solution adopted by the present invention is as follows: a polishing agent for improving the nano-surface of a rivet electrical contact, which is composed of the following components in parts by mass:

[0007]

[0008]

[0009] A treatment method for improving the nano-surface of a rivet electrical contact comprises the following steps: immersing the rivet electrical contact in the polishing agent for improving the nano-surface of the rivet electrical contact as described above, polishing the rivet electrical contact with a drum at 60 rpm for 6 hours, removing the rivet electrical contact, and then rinsing, washing, and drying the contact with pure water.

[0010] Compared with the prior art, the present invention has the following advantages: the rivet electric contact is immersed in a polishing agent mixed with potassium carbonate, phosphoric acid, oxalic acid, detergent 6501, isopropyl alcohol, potassium sodium tartrate tetrahydrate, and pure water. The synergistic effect of potassium carbonate, phosphoric acid, and oxalic acid is utilized to produce physical and chemical dual grinding on the surface of the rivet electric contact to achieve a rough polishing effect. Then, the synergistic effect of 6501, isopropyl alcohol, and potassium sodium tartrate tetrahydrate is utilized to lubricate, decontaminate, and brighten the surface of the rivet electric contact, thereby achieving a nano-surface effect with very high smoothness and cleanliness. DETAILED DESCRIPTION

[0011] In order to make the objectives, technical solutions and advantages of the present invention more clear, the present invention will be described in further detail below.

[0012] Example 1:

[0013] The polishing agent ratio used in this embodiment is (g / g):

[0014]

[0015] During preparation, mix the reagents in a container and stir until evenly mixed. For use, completely immerse 1 kg of rivet contacts in a mixture of potassium carbonate, phosphoric acid, oxalic acid, 6501, isopropyl alcohol, potassium sodium tartrate tetrahydrate, and pure water. Polish the contacts with a drum at 60 rpm for 6 hours, then remove the contacts, rinse with pure water, and dry.

[0016] Example 2:

[0017] The polishing agent ratio used in this embodiment is (g / g):

[0018]

[0019] During preparation, mix the reagents in a container and stir until evenly mixed. For use, completely immerse 1 kg of rivet contacts in a mixture of potassium carbonate, phosphoric acid, oxalic acid, 6501, isopropyl alcohol, potassium sodium tartrate tetrahydrate, and pure water. Polish the contacts with a drum at 60 rpm for 6 hours, then remove the contacts, rinse with pure water, and dry.

[0020] Example 3:

[0021] The polishing agent ratio used in this embodiment is (g / g):

[0022]

[0023] During preparation, mix the reagents in a container and stir until evenly mixed. For use, completely immerse 1 kg of rivet contacts in a mixture of potassium carbonate, phosphoric acid, oxalic acid, 6501, isopropyl alcohol, potassium sodium tartrate tetrahydrate, and pure water. Polish the contacts with a drum at 60 rpm for 6 hours, then remove the contacts, rinse with pure water, and dry.

[0024] The rivet electrical contacts treated in Examples 1-3 were tested according to the test items shown in Table 1. The test results show that the rivet electrical contacts treated in Examples 1-3 can achieve a nano surface effect with very high smoothness and cleanliness, and can present a nano surface state close to 100%.

[0025] Table 1 Rivet electrical contact treatment effect test items

[0026]

[0027] The above disclosure is merely a preferred embodiment of the present invention and certainly cannot be used to limit the scope of the present invention. Therefore, equivalent changes made according to the claims of the present invention are still within the scope of the present invention.

Claims

1. A polishing agent for improving the nano-surface of rivet electrical contacts, characterized by: It is composed of the following components in parts by mass:

2. A method for improving the nano-surface of a rivet electrical contact, characterized in that: The following steps are involved: The rivet electrical contact is immersed in the polishing agent for improving the nano-surface of the rivet electrical contact as claimed in claim 1, and is polished by a drum at 60 rpm for 6 hours. The rivet electrical contact is then taken out and rinsed with pure water, rinsed, and dried.

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