What is the purpose of dielectric coatings on tanks and piping?

Dielectric coatings are applied to tanks and piping primarily to isolate their external surfaces from environmental factors. This insulation prevents electrical conductivity, which can lead to galvanic corrosion—a process that occurs when two different metals come into electrical contact in the presence of an electrolyte, leading to deterioration. By using dielectric coatings, the coatings act as a barrier between the metal and the environment, reducing the risk of corrosion and extending the lifespan of the equipment. This is especially important in applications such as fuel storage tanks, where water and other contaminants can be present, contributing to corrosion processes. Therefore, the primary function of these coatings is to safeguard structural integrity and enhance the durability of tanks and piping systems.