The
principle of cathodic protection is in connecting an
external anode to the material to be protected from
corrosion and passing of an electrical DC current. So
that all area of the metal surface become cathodic and
therefore do not corrode. The external anode may be
a galvanic ( sacrificial ) anode or it may be an impressed
current anode where the current is impressed from external
dc source.
Impressed current anodes are having longer life than
sacrificial
anodes in cathodic protection due to their negligible
consumption rate, durability and strength. These impressed
current anodes are also known as dimensionally stable
or insoluble anodes.
TiTaN 's impressed current cathodic portection ( iccp
) anodes can be classified as :