Operation of thermal spray zinc (Zn) anodes for cathodic protection (CP) of reinforced concrete structures was investigated in laboratory and field studies conducted by the Albany Research Center (ARC) in collaboration with the Oregon Department of Transportation. The purposes of the research presented in this report were evaluate the need for preheating concrete to improve the adhesion of the anode estimate the service life of thermal spray Zn CP anodes; determine the optimum thickness for Zn CP anodes, characterize the anode-concrete interfacial chemistry; and correlate field and laboratory results.nLaboratory studies involved accelerated electrochemical aging of thermal sprayed Zn anodes on concrete slabs, some of which were periodically wetted while others were unwetted Concrete used in the slabs contained either 1.2 or 3 kg NaCl /m3 (2 or 5 lbs NaCl /yd3) as part of the concrete mix design.
展开▼
