A method for cleaning the electric corrosion layer of magnetic steel materials

Abstract

The invention discloses a method for cleaning a surface-processed electro-corrosion layer of a magnetic steel material, relates to the field of special processing, and includes a solution formula for cleaning and a cleaning process. The cleaning solution includes a pre-cleaning solution LCX‑52 water-based cleaning agent, mainly The cleaning solution is 300-400 g/L of chromic anhydride, and the cleaning process is ultrasonic cleaning with LCX-52 water-based cleaning agent (ultrasonic frequency 28-32Khz, the same below)→ultrasonic cleaning with chromic acid solution→ultrasonic rinsing with pure water→drying. The present invention can quickly and efficiently remove the electro-corrosion layer produced by electrical processing of magnetic steel materials. In the previous cleaning method, it needs to be polished and wiped one by one after cleaning. After cleaning, there is residual electro-corrosion layer, and the cleaning efficiency is low. There is basically no need for repeated cleaning and rework, which can realize mass production of parts, and the cleaned products will not change color and rust.

Description

Technical field: [0001] The invention belongs to cleaning technology and relates to a method for cleaning the surface of magnetic steel materials Background technique: [0002] Magnets are components used in various products such as motors, torque converters, and accumulators, and their main components are a mixture of cobalt, nickel, and rare earths. Because the material is brittle, its processing and forming are mainly wire cutting or EDM, which will produce a thick black electro-corrosion layer on the parts, which will affect the firmness of subsequent bonding, and the existence of black electro-corrosion products on the product will also cause problems. Will affect the reliability of the product. Due to the complex composition and high porosity of the magnetic steel material itself, it is difficult to completely remove the galvanic corrosion layer attached to the surface. Moreover, the magnetic steel is small and brittle, and general mechanical cleaning such as sand bl...

AI Technical Summary

Problems solved by technology

Because the material is brittle, its processing and forming are mainly wire cutting or EDM, which will produce a thick black electro-corrosion layer on the parts, which will affect the firmness of subsequent bonding, and the existence of black electro-corrosion products on the product will also cause problems. will affect the reliability of the product

Due to the complex composition and high porosity of the magnetic steel material itself, it is difficult to completely remove the galvanic corrosion layer attached to the surface

Moreover, the magnetic steel is small and brittle, and general mechanical cleaning such as sand blowing and grinding cannot be operated. Improper control of ultrasonic cleaning parameters will cause parts to be brittle. Underneath, the electro-corrosion layer penetrated into the pores is difficult to remove by wiping, the cleaning effect is poor, the parts are easy to be brittle, and the pass rate is low

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