Active and Passive Shaft Grounding Systems
At Sargam, we specialize in providing industry-leading corrosion protection solutions for marine and offshore environments. Our expertise covers CP system design, vessel inspection, and onboard servicing of critical protection systems. Explore our full range of services below.
Introduction
As ship propellers are typically made of bronze, they are almost always the largest cathodes on a ship. This means that a significant portion of corrosion and cathodic protection currents flow into the propeller. Effective grounding of this current is essential to protect shaft seals and bearings from premature deterioration and failure due to uncontrolled current flow and spark erosion.
While passive shaft grounding systems would suffice for all commercial Cathodic Protection implementations, for warships, the story becomes more complicated. Potential differences between the propeller shaft and the hull of even 10mV is enough to produce extremely low frequency electro-magnetic signatures that carry far and pose a threat from subsea mines.
Sargam is again, one of very few companies in the world that produce cost effective active shaft grounding (ASG) solutions. Sargam’s ASG systems are fitted on a variety of naval platforms from frigates and destroyers to aircraft carriers, while its passive grounding systems effectively complement its commercial ICCP systems.