What are the reasons for blackening of stainless steel castings?

There may be many reasons for blackening of stainless steel castings during use. Common reasons are surface oxidation and corrosion. The following are some methods to prevent blackening of stainless steel castings:

1. Keep the surface clean: Clean the surface of stainless steel castings regularly to prevent the accumulation of dirt and dust. You can use special detergent or clean water to wipe it.

2. Prevent chemical corrosion: Stainless steel castings should avoid contact with strong acids, strong alkali, salt and other chemical substances during use to avoid chemical reactions and surface corrosion.

3. Use anti-rust agent: Coating a layer of anti-rust agent on the surface of stainless steel castings can effectively prevent oxidation and corrosion and extend the service life.

4. Control the ambient temperature and humidity: Stainless steel castings are prone to oxidation reactions in humid environments, so the environment must be kept dry and at a suitable temperature.

5. Choose the appropriate stainless steel material: Different types of stainless steel have different corrosion resistance and oxidation resistance. Choosing the appropriate stainless steel material can effectively prevent the occurrence of blackening problems.