Patent ID: 6471851
Filing Date: 2002-10-29
Classification: C23F

Abstract:
A method of cathodic protection of reinforced concrete comprising the steps of:(a) thermally applying a sacrificial conductive metal onto an exposed surface of the reinforced concrete in an amount effective to form a sacrificial anode on such surface, wherein said conductive metal anode after thermal application is permeable, said conductive metal anode being bonded to the concrete surface and having an interface with the concrete surface; (b) subsequently applying onto the exposed surface of said conductive metal anode a humectant in liquid form; and (c) allowing said humectant to migrate through the pores of said conductive metal anode to said anode and concrete interface, the permeability of the anode being effective to position at or near said interface humectant in the amount of at least 20 grams, dry basis, per square meter of anode, said humectant increasing the current delivery from said anode at said interface.