In the industrial process of high-temperature casting, the corrosion problem of metal materials seriously affects the quality and service life of casting products. Corrosion not only leads to a decrease in material strength, but also increases maintenance costs. Therefore, it is particularly important to find an effective solution.

Corrosion Problems in High Temperature Casting

During high-temperature casting, metal materials in a molten state come into contact with a variety of chemicals, which can easily react and cause corrosion of equipment and molds. According to relevant data, under high-temperature conditions, the corrosion rate of casting molds is 5 to 10 times faster than under normal temperature conditions, which seriously restricts production efficiency and product quality.

Corrosion Type

High temperature corrosion generally manifests itself in four main forms:

• Oxidative corrosion: Metal reacts with oxygen at high temperatures to form oxides.
• Molten salt corrosion: Molten metal reacts with salts or fluorides, causing surface erosion.
• Sulfide corrosion: In a high temperature environment, metal reacts with sulfide to form corrosion.
• Mechanical wear: Under high temperature conditions, wear caused by friction is also a manifestation of corrosion.

Effective solutions

In response to corrosion problems in high temperature casting, the following solutions can be adopted to reduce the risk of corrosion.

1. Choose the right refractory material

The key to effectively prevent corrosion is to use refractory materials with good high temperature stability. For example, chrome corundum refractory plastic and silicon carbide ramming mass show excellent corrosion resistance in high temperature environments.

2. Apply corrosion-resistant coating

Applying corrosion-resistant coating on the surface of casting mold can effectively isolate metal from corrosive environment. Studies have shown that the use of corrosion-resistant coating can extend the service life of mold by more than 30%.

3. Control the production process

Proper control of temperature and time during the casting process can also significantly reduce the risk of corrosion. During the casting process, by optimizing the temperature, the metal is cast in a suitable molten state, thereby reducing the possibility of chemical reactions.

in conclusion

The corrosion problem in high temperature casting is a complex and important topic. By selecting suitable refractory materials, applying corrosion-resistant coatings and scientifically controlling the production process, the impact of corrosion on casting quality can be effectively reduced, thereby improving overall casting performance and achieving sustainable business growth.