PCBA circuit board waterproof and moisture-proof coating has widely varying optical properties. Nano-material coating can improve the corrosion protection of the substrate, and achieve the purpose of surface modification and decoration. Adding nanoparticles to paints or coatings can further improve its protection ability, and can withstand atmospheric and ultraviolet rays, so as to achieve anti-degradation, anti-discoloration and other effects; in addition, it can also be used in building materials products such as sanitary ware, indoor space, utensils Nano-material coating is used to produce sterilization and cleaning effect.
Among them, the PCBA circuit board is waterproof, moisture-proof, and corrosion-resistant. After all, the relatively weak part of electronic products is PCBA. Once water vapor or corrosive fluid penetrates into PCBA, it will cause component pins to be short-circuited or corroded, which will cause electronic products. The function of PCBA is affected or even damaged. The waterproof, moisture-proof and anti-corrosion methods of PCBA are usually structure protection + potting protection + PCBA functional coating protection from outside to inside.
PCBA nano moisture-proof coating
The circuit board nano-waterproof and moisture-proof coating is a new nano-material, also called nano-coating. It is currently an ideal alternative to three anti-paints. The thickness is only 2-4 microns, which is invisible to the naked eye, forming a pole on the surface of the PCB. The thin net effectively reduces the surface energy of the PCB, forms a lotus leaf effect, has good heat dissipation performance, does not affect the normal conductivity of the connector, and can waterproof up to IPx5, which basically meets the life waterproof standard, can also be corrosion-resistant, and resistant to acids and alkalis.
At present, this coating technology is used for anti-sweat in high-end sports headphones. Nano-coating is very simple in operation. Directly soak the circuit board in the nano-waterproof liquid for a few seconds and take it out to let it naturally dry for 5 minutes. It is convenient for maintenance. Environmental protection standards.
Regarding the process of waterproofing, anti-moisture and anti-corrosion by coating on PCBA, according to the characteristics of the material, it can be divided into spray coating, immersion coating and brush coating waterproof coating.
Coating method:
1. Surface spray type nano waterproof coating
2. PCBA immersion nano coating
3. Apply waterproof paint
