Fusion bonded epoxy powder coatings, commonly called FBE coatings, are epoxy-based systems applied to steel pipe, concrete reinforcing bars (rebar), piping connections and valves to protect them from corrosive environments. FBE powder provides good adhesion and strong resistance to cathodic disbondment.

FBE coatings are thermoset polymers. The resin and hardener remain unreacted under normal storage. At typical application temperatures of 180–250°C (356–482°F), the powder melts into a liquid, wets and flows over the steel surface, and then solidifies by heat-assisted chemical cross-linking. This is the “fusion bonding” process. The cross-linking is irreversible, so further heating will not re-melt the film.

How FBE Works

Electrostatic Spray DepositionPowder is charged in a spray gun and attracted to the grounded part. Film thickness is controlled by gun distance and powder feed rate.Fluidized Bed DippingThe preheated part is dipped into a fluidized powder bed, then removed and reheated to cure. Used for large, irregular shapes.

FBE coatings offer good corrosion resistance, high adhesion strength and good chemical resistance, together with impact resistance and flexibility for surfaces under mechanical stress. They are typically used for buried or submerged service; direct long-term UV exposure requires a suitable topcoat.

Benefits of FBE Rebar Coating

Compared with traditional liquid paint, FBE rebar coating extends service life and lowers lifecycle cost over time. It needs little maintenance, reducing labor cost, and is a solvent-free, environmentally friendly option for infrastructure projects.

Features

Strong Corrosion ResistanceResists chemicals, industrial wastewater and microorganisms.Good AdhesionStrong bond to steel, resists cathodic disbondment.Good Mechanical PropertiesImpact resistance and flexibility under mechanical stress.Not for Direct Outdoor UseFor buried/submerged service; add a topcoat for direct UV exposure.

Field of Application

PipeSteel pipes, gas pipes, water pipes.RebarSteel reinforcing bar for concrete.Piping ConnectionsFittings, couplings and joint components.Valve ProductsValves and related flow-control hardware.

Application Methods & Technical Data

Application method: corona electrostatic spraying.