Conformal Coatings to Protect Electronics in Extreme Environments
Electronic and electrical devices used outdoors or near the sea require the use of protective coatings commonly referred to as conformal coatings. However, traditional acrylic, epoxy and polyurethane conformal coatings are not hydrophobic and do not provide adequate protection in heavy moisture and are particularly susceptible to degradation in salt-fog environments. Silicone-based conformal coatings, while hydrophobic to water, allow for very high moisture penetration and are also susceptible to moisture and salt-fog-induced corrosion.
Critical infrastructures such as electrical power stations need protection against corrosion in high-voltage contact points. Electrical switches and other controlling electronics in industrial environments require protective coatings that can withstand direct water immersion and acid-rain-induced degradation. Additionally, outdoor electronics such as those under the hood of automobiles require extended moisture protection during the heat and humidity of summer weather.