Impressed Current Cathodic Protection Systems

Due to the high currents involved in many seawater systems it is not uncommon to use impressed current systems. Impressed current systems use anodes of a type that are not easily dissolved into metallic ions, but rather sustain an alternative reaction,

Installation of Impressed Current Cathodic Protection System

The Division provides maintenance to 108 numbers of suspended marine structures all over Hong Kong. Suspended deck structures are normally built of reinforced concrete (RC) and are subject to reinforcement corrosion in the aggressive marine environment.

The durability of RC structures is largely depended on the conditions of the embedded reinforcement. In the tidal zone and the splash zone, water and oxygen contents are optimal for reinforcement corrosion to occur.