What is Teflon coating?

Teflon coating is the brand name of PTFE (polytetrafluoroethylene) coating, which is a surface coating process that involves applying a thin layer of Teflon on the substrate to give it non-stick properties, low friction, and high heat, chemical and corrosion resistance.

Coating Formation Process

Surface Pretreatment: To ensure that the Teflon coating can adhere firmly to the surface of the substrate

Surface Roughening: Enhance the roughness of the substrate surface through sandblasting, chemical etching, etc. to improve the adhesion of the coating.

Cleaning: Remove oil, dust and other impurities from the surface of the substrate to ensure that the coating does not lose adhesion due to contamination.

Spraying: Use a spray gun to spray Teflon coating onto the surface of the substrate. Spraying is suitable for large-area coating and can evenly distribute the coating.

Dip Coating: Immerse the workpiece in the Teflon coating solution, and the coating is immersed in the surface of the workpiece. It is suitable for some smaller or complex-shaped parts.

Electrophoretic coating: The coating is evenly attached to the metal surface through the action of the electric field. Electrophoretic coating technology has unique advantages in ensuring uniform coating thickness.

Curing: After applying the Teflon coating, it needs to be cured. Curing is to evaporate the solvent in the coating by heating, so that the coating forms a film and enhances its adhesion. The curing temperature is usually around 300°C, and the specific temperature varies according to the coating thickness, coating type and material requirements.

Benefits of Teflon Coating

Low friction coefficient: Teflon coating has a very low friction coefficient (usually less than 0.1), which makes the coating surface slippery, effectively reduces wear and extends the performance and life of the components.

Corrosion resistance: Teflon coating is resistant to most acids, alkalis and organic solvents, and is suitable for harsh environments, especially in the chemical, aviation and other industries.

High temperature resistance: Teflon (PTFE) coating can withstand high temperatures of 260 degrees Celsius, allowing it to maintain good performance in high temperature environments.

Chemical resistance: It does not react with most chemicals, so it is widely used in parts that need to resist chemical corrosion.

Electrical insulation: Teflon has high electrical insulation and is often used in electrical and electronic applications.

Anti-stick properties: Teflon coatings have almost no adhesion to any substance and are easy to clean and maintain.

Safety: Teflon coatings are food grade, durable, and do not contain harmful substances such as perfluorooctanoic acid (PFOA).

Teflon coating capabilities