Patent ID: 8387555

Claim:
A system to apply a substantially uniform electroless nickel coating to an interior of tubular structures having at least a first opening at least proximate a first end thereof and a second opening at least proximate a second end thereof, the system comprising: at least a first tank to hold a solution for use in an electroless nickel coating process, the first tank sized to receive at least one tubular structure therein; at least a first distribution manifold having a number of injection ports, at least a portion of the first distribution manifold having the injections ports sized to be received in at least one of the first or the second ends of the at least one tubular structure, and to be retained therein at least while the at least one tubular structure is received in the first tank; a reservoir to hold a supply of an electroless nickel coating solution, the reservoir fluidly coupled to the injections ports of at least the first distribution manifold to deliver the electroless nickel coating solution from the reservoir to the injection ports of the first distribution manifold and thereby to an interior of the at least one tubular structure when the at least one tubular structure is received in the first tank; and a recirculation subsystem that repeatedly returns the electroless nickel coating solution to the reservoir.