How do ceramics work in metal surface treatment?

Ceramic agent is a chemical agent used for metal surface treatment, which mainly works in the following aspects:

Chemical reaction film formation

Ceramic agents contain a variety of ingredients, such as fluorozirconate, silane coupling agent, etc. During the metal surface treatment process, the ceramic agent reacts chemically with the metal surface to form a stable, insoluble ceramic conversion film on the metal surface. Taking steel surface treatment as an example, the fluorozirconate in the ceramic agent reacts with iron to form a composite oxide film containing zirconium, fluorine and other elements.

Improve corrosion resistance

Ceramic film has good corrosion resistance and can isolate metal from external air, moisture and corrosive media, preventing metal from oxidation and corrosion. For example, after the ceramic film is formed on the metal surface of automotive parts, it can effectively prevent the parts from rusting and corroding due to contact with rainwater, humid air, etc. during long-term use, thus extending the service life of automotive parts.

Enhanced adhesion

Ceramic film can significantly improve the adhesion between metal surface and subsequent coatings (such as paint, powder coating, etc.). On the one hand, ceramic film increases the roughness of metal surface, so that the coating can better mechanically bite; on the other hand, the silane coupling agent and other components in the ceramic film can chemically bond with the resin in the coating, thereby improving the adhesion of the coating on the metal surface. For example, in the production of metal furniture, the metal surface after ceramic treatment is then sprayed with paint, and the paint has stronger adhesion and is not prone to shedding and peeling, making the appearance of the furniture more beautiful and the service life longer.

Improve wear resistance

Ceramic film has a certain hardness and toughness, which can improve the wear resistance of metal surface and reduce the damage caused by friction, collision, etc. during the use of metal. For example, in the surface treatment of some mechanical parts, ceramic film can effectively resist the wear of parts during operation and improve the precision retention and service life of parts.

Improve appearance quality

The metal surface after ceramic treatment is more uniform and smooth, which can improve the appearance quality of the metal. For some metal products with high requirements on appearance, such as electronic product shells, bathroom hardware, etc., ceramic treatment can make the surface more beautiful and enhance the added value of the product.