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In this study, effectiveness of impressed current cathodic prevention (ICCP) and sacrificial anode cathodic prevention (SACP) in corrosion prevention of rebar in reinforced concrete (RC) is compared. ...Firstly, SACP method is applied in chloride-contaminated specimens which are kept in air curing condition for 150 days, then changed to dry/wet cycle NaCl solution cycle condition. Result shows that extremely high initial protective current, then decreased drastically until being stabilized. The depolarization value increases in dry/wet cycle condition than air condition. Secondly, ICCP method is applied with different protective current density, where corrosion of the steel bars were accelerated beforehand. Result shows that higher current density provides higher depolarization value. However, even smaller current density still able to reach 100 mV criterion after 56 days of test period. Based on both results, ICCP and SACP were combined as “hybrid system” to extend the service life of SACP. Initial current consumption was controlled in ICCP stage before changing to SACP stage. Result shows that on potential value increases gradually in ICCP stage and stabilizes after changing to SACP stage, while depolarization value in SACP stage shows more stabilized value compared to the value in SACP only.続きを見る
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