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Several schemes to prevent blackening of stainless steel castings

Generally, stainless steel castings are silver-white and silver-gray, and there will be basically no change after a period of use. Under normal circumstances, blackened stainless steel castings cannot continue to be used and can only be replaced with new ones. Next, the method to prevent blackening of stainless steel castings will be introduced.

A method to prevent blackening of stainless steel castings.

1. Surface cleaning: After aluminum products are die-casted and machine-added, corrosive substances such as mold release agent and cutting fluid will remain on the surface of aluminum products. For example, stainless steel castings will become black if they are not cleaned. Stainless steel castings go through six cleaning processes including pre-degreasing, degreasing, water washing, pickling, water washing, and water washing, which can reduce the risk of oxidation and blackening of stainless steel castings.

2. Process control: If the pressure of stainless steel castings is not enough during die-casting, the density of the material will be reduced and pores will be formed. The pores are prone to blackening after water absorption and oxidation. Therefore, the speed and strength of die-casting of stainless steel castings will be better controlled to prevent .

3. Process attention: stainless steel castings must be operated with gloves to avoid direct contact between the skin and aluminum castings. In addition, pay attention to the drying of the product to prevent water marks from remaining on the surface of the object.

4. Storage and packaging: The stainless steel castings should be placed in a ventilated and dry environment to avoid direct sunlight. Choose open-hole packaging, volatile water droplets, and add moisture-proofing agent to the box.

According to the above methods to prevent stainless steel castings from blackening, choose a suitable casting process, and do a good job of preventing moisture. Stainless steel castings should also be stored in an appropriate environment during storage to avoid blackening of stainless steel castings.

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