Vetus Zinc Shaft Anode For Metric Shafts. ZINKAS25C

Cathodic protection by means of anodes is a must for the protection of all metal parts under water. Therefore, not only for steel boats, but also for wooden, fibreglass and aluminium hulls, anodes are required. The Material of the Vetus zinc anodes is of the highest possible standard, the U.S mil. -A-18001 K. specifications. Anodes which do not meet these specifications have hardly any effect or no effect at all. Vetus Aluminium anodes consist of an aluminium-indium-zinc alloy Mil - A - 24779 (SH). All Vetus anodes are streamlined and mounted either with specially made studs, which can be welded to a steel hull, or special through-hull bolts for fibreglass and wooden boats.

Vetus shaft anodes

Vetus shaft anodes are designed to create a perfect fit on the shaft. Even as the anode is eroded, it cannot come loose. An interlock system is incorporated in both halves, to ensure that the bolt holes are in perfect alignment. The material around the holes are in perfect alignment. The material around the holes is also increased to prevent the bolts becoming loose.

Shaft anodes are not recommended on high speed vessels. They create turbulence in the water flow around the propeller and as they erode, can cause imbalance in the propeller shaft. These problems do not occur when using the Vetus propeller nut with the integrated zinc anode.