Patent ID: 7749362
Filing Date: 2010-07-06
Classification: C23F,Y10T

Abstract:
1. A sacrificial anode assembly to protect steel in corrosion damaged reinforced concrete construction comprising a base metal less noble than steel and a catalytic activating agent that is adapted to maintain base metal activity and that is not substantially consumed during base metal dissolution and a porous layer that substantially surrounds the base metal and the catalytic activating agent wherein the assembly is a discrete sacrificial anode assembly adapted for embedment in cavities formed in reinforced concrete and a concentration gradient in the catalytic activating agent is formed across the porous layer prior to use of the assembly and the porous layer comprises a material that is substantially inert in the presence of the catalytic activating agent in that the porous layer does not react with the catalytic activating agent to substantially remove the catalytic activating agent from the soluble phase.