Three anti-paint also called PCB electronic circuit board protection oil, coated oil, moisture-proof paint, three anti-paint, waterproof plastic, insulating paint, anti-corrosion paint, salt spray paint, dust paint, protective paint, drape paint, three Anti-adhesive, PCB circuit board with three anti-paints has waterproof, moisture-proof, dust-proof " three-prevention " performance and resistance to cold and heat shock, aging resistance, radiation resistance, salt spray resistance, ozone corrosion resistance, vibration resistance, flexibility Good, strong adhesion and other properties.
Moisture is a major and destructive factor for PCBs . Excessive moisture can significantly reduce the insulation resistance between conductors, accelerate high-speed decomposition, reduce Q , and corrode conductors. We often see that the metal part of the PCB circuit board has a greenish green that is not caused by the chemical reaction of the three antipaint metal copper and water vapor and oxygen together.
On the printed circuit board, hundreds of randomly found pollutants have the same destructive power. They can lead to the same result as moisture erosion - electron failure, corrosion of conductors, and even irreparable short circuits. Contaminants found in electrical systems may be chemicals left over from the process. Examples of such contaminants include fluxes, solvent release agents, metal particles, and marking inks. There are also major pollution groups that are accidentally caused by human handling, such as body oils, fingerprints, cosmetics and food debris. There are also many contaminants in the operating environment, such as salt sprays, sand, fuel, acids, and other corrosive vapors and molds.
Coating three anti-paints on printed circuit boards and components can reduce or eliminate degradation of electronic operating performance when it may be affected by unfavorable operating conditions. If this coating can maintain its effect for a satisfactory period of time , such as greater than the product's useful life, it can be considered as having achieved its purpose of coating.
Even if the coating layer is thin , it can tolerate mechanical vibration and vibration, thermal shock, and operation at a high temperature to some extent. Of course, the concept that a thin film can be used to make individual parts inserted in a printed circuit board have mechanical strength or sufficient insulation is wrong. Components must be mechanically fastened and have their own suitable caulking agent so that there is a double insurance against accidents.
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