Three-coating is a specially formulated coating designed to protect circuit boards and their associated equipment from environmental degradation, thereby increasing and extending life and ensuring safety and reliability. Under realistic conditions, such as chemical environment (fuel, coolant, etc.), vibration, high dust, salt spray, humidity and high temperature, the circuit board may cause corrosion, softening, deformation, mildew and other problems, resulting in circuit board circuit failure. . The three anti-paint is applied to the exterior of the circuit board to form a pliable film having a thickness of about 50-100 microns. It protects the circuit from damage under relatively harsh conditions.  

  

 

In some harsh environments, the board is prone to failure. Once the board fails, the consequences will roll like a snowball. For example in a humid environment. Moisture often attacks the board, and excessive moisture can significantly reduce the insulation resistance between the conductors, causing undesirable consequences.