Powder metallurgy surface treatment

Powder metallurgy surface treatment :(after heat treatment, cutting and polishing)
Suitable for ferrous powder metallurgy and stainless steel powder metallurgy
1. Remove oil and remove adhesion at high temperature, so that the oil and adhesives in the body flow out of the surface pores and carbonize at a temperature of 200-220 ° c for 1 hour.
2. Seal the hole and boil in the boiling water of deionized water for 5 minutes or molten zinc stearate for 20 minutes.
3. Roll and wash with oil and water (ultrasonic).
4. Soak MJ0045 passivation solution at room temperature or with appropriate heating for 10-15 minutes.
5. Washing and drying (2-3 years rust prevention of iron-based powder metallurgy, salt spray resistance of stainless steel powder metallurgy for over 48 hours)
6. According to the requirements can be immersed in oil (passivated surface and then immersed in oil), do spraying.Electrophoresis and electroplating.