3 rust prevention methods for powder metallurgy products!

3 rust prevention methods for powder metallurgy products!

Powder metallurgy is an efficient metal forming process, which is characterized by material saving, energy saving, pollution-free and suitable for large-scale production. Powder metallurgy parts are made of metal powder by pressing, sintering, machining and heat treatment. Therefore, powder metallurgy products must have certain air holes, generally containing 10% - 30% of air holes. It is easier to rust than steel. So, what are the anti rust treatments for powder metallurgy products? The following powder metallurgy manufacturer, zhongwei, will give you a detailed introduction:

Powder metallurgy factory

The rust of powder metallurgy products in use is mainly caused by the fact that the water between products has not been cleaned. Therefore, the main method to solve the problem of corrosion in powder metallurgy is to remove water. At the same time, the surface of dense materials that are easy to be oxidized and rusted should be treated with rust prevention during production and processing. According to different requirements of products, the following methods can be adopted to prevent rust.

1. Blackening treatment

Blackening treatment is generally applied to iron based material parts. Blackening is a common means of chemical surface treatment. The principle is to produce a layer of oxide film on the metal surface to isolate air and achieve the purpose of rust prevention.

2. Use antioxidant

For example, the surface rust prevention treatment of some iron based powder metallurgy products can be sprayed on the metal surface with antioxidant, and the rust prevention effect is very good after drying.

3. Use antirust oil

After sintering, the anti rust oil is hot dipped to reduce the water intrusion in the air after sintering. Clean with kerosene after machining to prevent rust between processes; Accelerate the circulation speed between processes, and soak more antirust oil as much as possible. A little antirust oil can be sprayed on the processed powder metallurgy parts before packaging to avoid rust of powder metallurgy parts. After spraying antirust oil, it should always be in a sealed state. The antirust effect will be better.

The above is the rust prevention experience of Zhongwei Precision Powder Metallurgy Factory for many years. There are many kinds of rust prevention and all kinds of models, which can meet your different rust prevention requirements.