Patent ID: 8709535

Claim:
A method of enhancing corrosion resistance of a hollow vessel, the method comprising: providing a hollow vessel including a wall defining a cavity for storing a fluid with the vessel in an upright orientation, the wall including interior and exterior surfaces and a plurality of apertures providing access to the cavity; providing a coating tank filled with a liquid coating having charged coating elements; mounting the hollow vessel to a fixture in an upside-down orientation; submerging the hollow vessel into the liquid coating; allowing the liquid coating to pass into the cavity through at least a first one of the plurality of apertures, the first one of the plurality of apertures being positioned at the top of the hollow vessel when in the upright orientation; venting displaced air from the cavity through at least a second one of the plurality of apertures, the second one of the plurality of apertures being positioned at the bottom of the hollow vessel when in the upright orientation; coating the exterior surface with a portion of the coating elements; coating the interior surface with an additional portion of the coating elements; removing the hollow vessel from the coating tank; draining the liquid coating from the cavity; heating the hollow vessel in an oven; and curing the portion of the coating elements on the exterior surface and curing the additional portion of the coating elements on the interior surface.