Teflon coating is different from other coatings, its requirements for the substrate and spraying process requirements are relatively high, in the process of spraying in strict accordance with the requirements.

first: substrate processing

first, the substrate (aluminum, stainless steel or other metal substrate) is baked at high temperature (360 ℃ × 30 minutes ~ 380 ℃ × 10 minutes) to carbonize grease or clean with degreasing agent for degreasing in the first step. the second step is surface roughening. corundum sand 80#~ 120#, pressure 0.4~0.6mpa, sand blasting can be used to make the surface roughness of the substrate:(2.0~3.5)μm

second: Teflon primer spraying

Teflon primer must be fully rolled or slowly stirred evenly with stirring blades before use (note: shear blades are not allowed to stir at high speed, otherwise the coating structure will be destroyed and Teflon coating will deteriorate), the treated substrate will be fixed, and the pressure of (1.0~1.5)mm Ф spray gun will be adjusted to (0.2~0.3)mpa with a distance of (20~30)cm, and the stock solution will be sprayed directly, with (120~160) DEG C x (8~15) minutes, the film thickness after drying is (10~15) m.

III: Spraying of Teflon Topcoat

Teflon topcoat must be fully rolled and evenly or slowly stirred evenly with stirring blades before use. After the workpiece coated with base oil is cooled to normal temperature (generally 30-50 ℃ is recommended), Teflon topcoat can be applied. A spray gun nozzle with a Ф of (1.0-1.5)mm is used, the pressure is adjusted to (0.2-0.3)mpa, the distance is (20-30)cm, and the stock solution is sprayed directly, after drying at (120-150) ° C. ×(5-8) minutes, sintering was carried out at 380 ° C. × 10 minutes, and the total coating film after sintering was (20-25)μm.

have are the following:

the sintering is not sufficient, either the temperature is not enough, or the time is not enough, the surface of the baked workpiece will be white, which will affect the adhesion, and the physical properties of the Teflon coating will be reduced,sintering too much will make the coating performance worse, so please be careful construction.

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Focus: non-stick coating, Teflon coating,

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