Tecnoseal X9MG Shaft Anode - Magnesium - 2" Shaft Diameter

The Tecnoseal X9MG Shaft Anode is a magnesium cathodic protection device engineered for marine propulsion systems with 2" shaft diameters. Shaft anodes are critical components in saltwater and brackish environments, sacrificing themselves electrochemically to prevent corrosion of underlying steel or aluminum shafts. This magnesium anode is designed for boat owners, marine mechanics, and industrial users who require reliable underwater protection to extend propeller shaft service life and maintain structural integrity in harsh marine conditions.

Constructed from high-purity magnesium, the X9MG features a 3.02" outer diameter and 3.25" height, with four mounting holes for secure installation on standard shaft configurations. Magnesium anodes offer superior electrochemical potential compared to zinc alternatives, making them ideal for fresh water, brackish, and low-salinity environments where they outperform traditional sacrificial protection methods. The anode's geometry allows for efficient current distribution along the shaft length, ensuring uniform corrosion protection while minimizing turbulence and drag during vessel operation.

Marine technicians and recreational boaters benefit most from this anode when protecting inboard and outboard shaft systems prone to galvanic corrosion. Installation involves securing the anode directly to the shaft using the provided mounting holes with stainless steel fasteners to prevent cross-contamination. Regular inspection and periodic replacement—typically every 2 to 5 years depending on water salinity and vessel usage—ensures continuous cathodic protection. The 0.7 lb weight and compact dimensions make it suitable for retrofit applications on existing vessels without significant structural modification.