Title: Study and Application of Impressed Current Cathodic Protection Technique for Atmospherically Exposed Salt-Contaminated Reinforced Concrete Structures
Author(s): Dinghai Hong, Weiguo Fan, Dekuan Luo, Yan Ge, and Yaxian Zhu
Publication: Materials Journal
Appears on pages(s): 3-7
Keywords: cathodic protection; conductivity; corrosion; durability; repairs; marine atmospheres; mortars (material); reinforced concrete; reinforcing steels; Materials Research
For economically and effectively solving the widely existing rehabilitation problem of marine reinforced concrete superstructures due to reinforcing steel corrosion damage in China, a kind of secondary anode (patented AS conductive mortar overlay) and a CN-1-type conductive plastic wire anode have been developed. One system consists of linear CN-1-type anode embedded in AS mortar overlay, and another one consists of a netlike CN-1-type anode embedded in OPC mortar overlay. These two new systems have been applied as anode systems on the bottom parts of some marine reinforced concrete superstructures, and impressed current cathodic protection was applied in sites normally for 3 years. Paper presents and discusses the results and the techniques in practice. It verifies that both anode systems of cathodic protection are highly effective for such structures, and the systems could also be applied economically and easily on a side or soffit surface by a plasterer.