Difference between enamel coating and cermet coating

There are significant differences between enamel coating and metal ceramic coating in many aspects. The following are their main differences:

1. Definition and substrate

Enamel coating: Enamel coating is a protective layer formed by applying glass enamel paint on the metal surface by melting method, also known as porcelain glaze coating. Its substrate is mainly metal, such as steel plate, cast iron, etc.

Metal ceramic coating: Metal ceramic coating refers to the process of forming a hard, smooth and crystal clear ceramic layer on the surface of utensils or other substrates by chemical or physical methods. The substrate of metal ceramic coating can be more diverse, not only limited to metal, but also including ceramics, plastics, wood and other materials.

2. Composition and structure

Enamel coating: Enamel coating is mainly made of inorganic glass material, and its internal atomic arrangement is disordered, random and lacks long-range periodicity. It is a typical amorphous structure. This structure makes enamel coating have excellent antioxidant ability and high density.

Metal ceramic coating: Metal ceramic coating is an inorganic protective layer or film composed of a variety of ceramic materials, and its composition may include oxides, carbides, nitrides, etc. Metal ceramic coatings can be prepared by different process methods, such as sintering coatings, spray coatings, vapor deposition coatings, etc., with a variety of structures and properties.

3. Performance characteristics

Corrosion resistance: Both have good corrosion resistance, but enamel coatings may show stronger corrosion resistance in certain specific environments because they are closely combined with the metal substrate and their own material is stable.
Wear resistance: Both enamel coatings and metal ceramic coatings have excellent wear resistance, but the specific performance may vary depending on factors such as coating thickness and preparation process.
High temperature resistance: Metal ceramic coatings usually have higher high temperature resistance and can remain stable in extremely high temperature environments. However, the high temperature resistance of enamel coatings is relatively weak and is not suitable for extremely high temperature heating equipment.
Aesthetics: Metal ceramic coatings are usually superior to enamel coatings in terms of aesthetics and fineness, and can give products a more crystal clear appearance.

4. Application areas

Enamel coatings: Enamel coatings are widely used in kitchen utensils, sanitary ware, building materials and other fields. For example, kitchen sinks, sinks, oven linings, etc. often use enamel coatings to improve corrosion resistance and easy cleaning.
Metal ceramic coatings: Metal ceramic coatings are widely used in various industrial fields due to their excellent wear resistance, corrosion resistance, anti-sticking, high hardness and other properties. For example, in the aerospace field, metal ceramic coatings are used to prepare protective layers for high-temperature components; in the electronics industry, metal ceramic coatings are used to prepare high-performance capacitors and integrated circuit substrate packaging materials.

In summary, there are obvious differences between enamel coatings and metal ceramic coatings in terms of definition and substrate, composition and structure, performance characteristics, and application areas. When choosing to use, comprehensive consideration should be given based on specific needs and scenarios.