Fusion-bonded epoxy coating principally protects against corrosion by serving as a barrier that  isolates the steel from the oxygen, moisture and chloride ions that are needed to cause corrosion.  Fusion-bonded epoxy coating also has a high electrical resistance, which blocks the flow of electrons that make up the electrochemical process of corrosion.  In addition to serving as a circuit breaker, the coating reduces the size and number of potential cathode sites, which will limit the rate of any corrosion reaction that could occur. 

FBE Coating can be done in the range of 300 microns to 675 microns thickness. In certain cases it can be coated maximum up to 1200 microns. FBE coating is a pin hole free coating when it is coated in the range of 400 microns to 1200 microns thickness. It is been tested with maximum of   2.2 KV spark test.