Casting coating is a type of protective coating used for metal surfaces, which can provide protection during the manufacturing and use of metal materials. During the casting process, metal parts are often affected by issues such as oxidation, burning, and thermal fatigue, so choosing a suitable casting coating is crucial. Below are several casting coatings that can effectively prevent metal oxidation, burning, and thermal fatigue.

1. Silicate casting coating

Silicate casting coating is a common coating used for metal surface protection. Its main component is a mixture of silicate powder, organic resins, solvents, etc. Silicate casting coatings can form a strong ceramic coating, effectively preventing metal oxidation and burning. At the same time, silicate coatings have good high-temperature resistance, which can effectively reduce the degree of thermal fatigue of metals and improve the service life of metal parts.

2. High temperature curing coating

High temperature curing coating is a special type of casting coating that can quickly cure at high temperatures to form a strong protective layer. High temperature curing coatings are generally composed of organic resins, fillers, curing agents, etc. This coating forms a dense film layer on the metal surface, which can effectively isolate the contact between the metal and external oxygen, and prevent oxidation reactions from occurring. At the same time, the curing agent of high-temperature curing coatings can undergo chemical reactions at high temperatures, forming a hardened layer with high temperature resistance, effectively preventing burning and thermal fatigue.

3. Aluminum silicide casting coating

Aluminum silicide casting coating is a commonly used coating to prevent metal oxidation and burning. Its main components are aluminum silicide and organic resin. Aluminum silicide casting coating can form a dense and high-temperature resistant ceramic coating on the metal surface, effectively isolating the contact between the metal and external oxygen, and preventing metal oxidation and burning. Compared with silicate coatings, aluminum silicate casting coatings have higher high-temperature resistance and better protective effects on metal parts in high-temperature environments.

4. Galvanized coating

Galvanized coating is a type of coating used for metal surface protection, which is a mixture of zinc powder, organic resins, solvents, etc., and then coated on the metal surface. Galvanized coating can form a zinc film with anti-corrosion properties, effectively preventing metal oxidation and burning damage. Zinc film has the characteristic of self-healing. When the film layer is damaged, zinc will migrate to the damaged area of the film layer under the action of corrosion current for repair, thereby extending the service life of the metal parts.

5. High performance ceramic coatings

High performance ceramic coating is a special type of metal surface protective coating, mainly composed of ceramic powder and organic resin. High performance ceramic coatings have good oxidation resistance and high temperature resistance, which can form a dense ceramic coating, effectively preventing metal oxidation, burning loss, and thermal fatigue. In addition, high-performance ceramic coatings also have chemical corrosion resistance, which can protect the surface of metal parts in harsh working environments.

In summary, silicate casting coatings, high-temperature curing coatings, aluminum silicate casting coatings, galvanized coatings, and high-performance ceramic coatings are several casting coatings that can effectively prevent metal oxidation, burning, and thermal fatigue. When selecting coatings, it is necessary to make a reasonable selection based on comprehensive factors such as the properties of metal materials, working environment, and usage requirements, in order to achieve good protective effects.