{465} Conformal Coating - Protect Electronic Circuit Board from Weather effect Plastic70

in this video I discussed what is #conformal #coating. Conformal Coating - Protect Electronic Circuit Board from Weather effect Plastic70. Conformal coating spray is a thin polymeric film which conforms to the contours of a printed circuit board to protect the board's components from weather effect. Typically applied at 25-250 μm (micrometers) thickness, it is applied to electronic circuitry to protect against moisture, dust, chemicals, and temperature extremes. Specially after soldering the board must be cleaned with some contact cleaner, isopropyl alcohol 99.9% or any suitable cleaning solvent material to remove oxides which built at soldering points.
Conformal coating application
Coatings can be applied in a number of ways, including brushing, spraying, dispensing and dip coating. Furthermore, a number of materials can be used as a conformal coating, such as acrylics, silicones, urethanes and parylene. Each has their own characteristics, making them preferred for certain environments and manufacturing scenarios. Most circuit board assembly firms coat assemblies with a layer of transparent conformal coating, which is lighter and easier to inspect than potting
Conformal coatings are used to protect electronic components from the environmental factors they are exposed to. Examples of these factors include moisture, dust, salt, chemicals, temperature changes and mechanical abrasion. Successful conformal coating will prevent the board from corroding. More recently, conformal coatings are being used to reduce the formation of whiskers and can also prevent current bleed between closely positioned components.
Conformal coatings are breathable, allowing trapped moisture in electronic boards to escape while maintaining protection from contamination. These coatings are not sealants, and prolonged exposure to vapors will cause transmission and degradation to occur. There are typically four classes of conformal coatings: Acrylic, Urethane, Silicone, and Varnish. While each has its own specific physical and chemical properties each are able to perform the following functions:
Insulation: Allowing closer conductor spacing
Eliminate the need for complex enclosures
Minimal effect on component weight
Completely protect the assembly against chemical and corrosive attack
Eliminate performance degradation due to environmental hazards
It Minimize environmental stress on a PCB assembly

some conformal coating brands
PLASTIC70,
Techspray Fine-L-KOTE,
RS silicon coating,
HPA200H,
Aerol silicon conformal coating,
electrolube silicon resin conformal coating,
mg-chem, 422a-340g,
422B conformal coating,
silicon conformal coating,
miracle pcb coating,