Precautions for coating of three-proof paint

Reading Volume：【 2315 】

Time：【 2018-10-13 】

There are many types and models of three anti-paints on the market, and the process of operation will naturally increase; however, no matter how the process changes, their operating procedures still have a lot in common, so what are the common points? ?
1. The coating temperature of the three-proof paint should be between 30-50 degrees Celsius, and the relative humidity should not be higher than 85%. The circuit board is a composite material, which is easy to be damp. In order to make the three-proof paint play a full protective effect and prevent the lack of gloss or whitish moisture absorption, the circuit board can be preheated and baked and vacuum dried to remove most of the moisture.
2. The three-proof paint generally contains flammable solvents, and high temperature and open flames should be avoided; the three-proof paint generally has a slight pungent odor, and the operation workshop should be sufficiently ventilated to facilitate the volatilization and rapid curing of the solvent in the three-proof paint; avoid long-term inhalation Steam and prolonged contact with the skin; the cured processing is basically harmless to the human body, but the coating operation should pay attention to safety and protection, the environment should be ventilated, and the employees should wear protective masks.
3. If you want to get a thicker coating, it is best to apply two thinner coatings, and it is required to allow the second layer to be applied after the first layer is completely dried.
4. When coating the three-proof paint on the circuit board, generally the connector, socket, switch, sensitive device, plug-in area, etc. are not allowed to have coating materials, and the corresponding covering process must be used.
5. Used brushes, spray guns and other utensils should be cleaned with special Osbon 108 thinner in time for the next use.
6. Do not pour the poured three-proof paint back to the original packaging to avoid contamination of the unused three-proof paint. The unused three-proof paint should be sealed and stored in a cool place for next use.
7. To repair a device that has been coated with three-proof paint, you can remove the component by soldering and electric soldering directly to the coating, then install new components, and then clean the area with a brush or three-proof paint thinner , After drying, re-coat with three anti-paint.

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