Evaluation of Sacrificial Anode Cathodic Protection of Steel Pipe Piles of a Wharf in Zhoushan

Sacrificial anode cathodic protection system of steel pipe piles of a wharf in Zhoushan has operated for more than 10 years.The sacrificial anode protection effect is evaluated and analyzed by examining appearance,calculating service life of the anodes,measuring protection potentials and inspecting corrosion status of the steel pipe piles.The results show that steel pipe piles have been pretected effectively in this ten years,and the residual life of the sacrificial anode should be more than ten years.The actural application life of sacrificial anode would surpass the design life.