What is Impressed Current Cathodic Protection System
Impressed current cathodic protection system is suitable for inhibiting the formation of corrosion electrons on the surface of the hull steel plate after the hull paint breakage of all kinds of offshore ships, mobile platforms, floating docks, etc. It protects the hull steel plate from corrosion and replaces the traditional zinc block cathodic protection.
Overview
Working Principle
The impressed current cathodic protection (ICCP) makes use of the principle of electrochemical corrosion, whereby the anode connected to the external DC power supply directly applies cathodic current to the protected ship to uninterruptedly provide electrons, thus enriching the electrons on the metal surface; and through the control of the ship's hull potential or current density, it makes the ship's hull to undergo cathodic polarisation, so as to achieve the purpose of lowering or even completely inhibiting the corrosion of metals on the submerged parts of the ship's hull. The applied current protection system consists of auxiliary anode, reference electrode, intelligently controlled DC power supply and relevant connecting cables. When the circuit is connected, the current will form a closed loop from the anode to the ship hull via seawater, so that the ship hull will be protected from corrosion. The ship's applied current cathodic protection system can effectively prevent electrochemical corrosion of the submerged part of the ship.
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Characteristics
1)The current can be adjusted automatically with the changes caused by external conditions, so that the potential of the protected part is controlled within the optimal protection potential.
2)Long service life and long protection cycle.
3)The auxiliary anode discharge volume and function radius are large, so it can protect equipment and harbour buildings with complex structure and large area.
Picture of Impressed Current Cathodic Protection
