Patent ID: 7914661
Filing Date: 2011-03-29
Classification: C23F

Abstract:
1. A method for cathodic protection: for a steel member at least partly embedded in a cementitious covering material; the method comprising: providing a sacrificial anode member in the form of a body separate from the cementitious covering material; the anode member including a sacrificial anode material of a character which corrodes relative to the steel member to form corrosion products; and the anode member including a porous material; embedding the anode member in the cementitious covering material; and electrically connecting the anode member to the steel member so that an electrical galvanic potential therebetween causes corrosion of the sacrificial anode material and tending to inhibit corrosion of the steel member; wherein the anode member includes an additive enhancement a material within at least part of said porous material arranged to (i) maintain moisture in the anode member so as to maintain conductivity at an interface of the anode material and (ii) keep the interface of the anode material electrochemically active to ensure that current is maintained; and wherein the enhancement material has a pH which is less than 12.