TITLE: EXPERIMENTAL STUDY ON THE PERFORMANCE OF SACRIFICIAL ANODE CATHODIC PROTECTION UNDER LOW TEMPERATURE AROUND -17°C
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Date
2018-09-07Author
MAHASIRIPAN, ARIS
ASTUTI, PINTA
RAFDINAL, RAHMITA SARI
HAMADA, HIDENORI
SAGAWA, YATSUTAKA
YAMAMOTO, DAISUKE
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Temperature influences all the processes involved in corrosion, for instance, anodic and cathodic electrochemical reactions, transport of aggressive species to the steel surface, and ionic flow through concrete. The design of a sacrificial anode cathodic protection system should consider the type and location of anodes to achieve sufficient and durable protection. It is because the current generated from a sacrificial anode is directly related to the environment that it placed. Anodes in wet or humid climates will typically produce higher levels of current and distribute it to the reinforcement that needs to protect. Thus, this paper reviews performance of sacrificial anode applied in concrete exposed under low temperature around -17C. Sacrificial anode installed in the concrete with chloride free or chloride contamination. Reinforcing steel with and without anode connection embedded in the concrete. Freeze chamber with low temperature -17°C and relative humidity (R.H.) 4-5% used as the exposure condition to observe the anode reliability. The performance of the anodes was assessed using electrochemical test. The results from depolarization test indicate that sacrificial anode is active to polarize the rebar to protection level. Protective current exhibits fulfill the design limit for cathodic protection. On-site corrosion rate measurement also shows that corrosion resistance of reinforcing steel is increased on the rebar with anode protection and grade passivity of rebar becomes in better condition. It means that protective current flow from anode distributes to rebar in the concrete even though under freeze environment condition