New Technique for Enhancing the Anodes Performance of Cathodic Protection Deep Well Systems

Abstract

A special round-grain construction was suggested   for use as a grout material surrounding the anode case of deep well groundbed in an impressed current cathodic protection systems. The experimental results show that the proposed grout material is relatively uncrushable to protect the anode groundbed from collapsing of the wells to undermine, having a good electrical conductivity (low resistivity) which increase the active size of anode, provide a lower electrical resistance to surrounding earth and reduce anode consumption resulting from current discharge. The proposed round-grain shape includes a mixture of different percentage weights of Carbon black powder, Portland cement, Graphite and Surfactant material by mixing (1.8) kg of grout powder with (1) liter of water (mixing ratio 1.8:1) which may be pumped between the groundbed steel casing and soil bore well for a substantial distance up from minimal of the well and in the vicinity of the casing and ultimately to the land surface.

Keywords:  Cathodic Protection(CP), Grout material, Deep well groundbed, Impressed current