PIER PIPE PILES – IMPRESSED CURRENT SYSTEM
The corrosion of metallic structures in seawater can be reduced to a low value by the application of cathodic protection. Impressed current systems use direct current from a low voltage source that is introduced into the seawater at a suitable distance from the pier pipe/piles.
Anode Cable
Halar insulated HMWPE cable is suitable for use in harsh chemical environments involving brackish water, sour gas, chlorine, acids, alkalis, and petroleum based solvents. Typical use includes well casings, water submerged metallic structures, storage tanks, and pipelines.
Morganode II Marine Anode
Impressed current anodes designed for physically harsh environments where protective current is required. The HDPE body provides superior operating endurance on pipe pile and sheet pile applications.
Negative Grounding
The exothermic welding system is used for making electrical connections of copper wire to steel and cast iron surfaces for cathodic applications.
Rectifier
What is commonly referred to as a rectifier is actually a transformer-rectifier unit. It contains a step-down transformer, a means of adjusting the voltage, a rectifier to change AC to DC, and various controls and other components depending on usage.
Anode Junction Box
The positive direct current from the rectifier is connected to each anode wire at the anode junction box. It also provides access for the measurement of the effectiveness of a cathodic protection system.
Cable Guard
Epoxy-coated or galvanized steel channel with mounting straps to secure and protect the anode cable from debris, water craft, floating ice, etc.
Reference electrodes (half-cells)
Important devices that permit measuring the potential of a metal surface exposed to an electrolyte. An example is a structure-to-soil potential measurement.
