ANODE GORI COLLAR 28-30

Function and technical context

The collar anode for Gori 28 to 30 inch propellers is a sacrificial piece that acts as cathodic protection on the boat's drive shaft, neutralizing the galvanic corrosion that occurs when different metals coexist in an electrolytic medium such as seawater or fresh water with minerals. Its mission is to degrade in a controlled manner to preserve the integrity of the most valuable structural components: the propeller shaft itself, the horn, the Gori propeller and the adjacent bronze or stainless steel accessories. When installed in a collar around the shaft, it guarantees continuous circumferential coverage of the area most exposed to electrolytic corrosion, which is precisely the submerged section of the shaft between the hull and the propeller. Without effective cathodic protection at this point, corrosion progresses silently and can compromise the integrity of the axle, cause play in the axle line bearings and lead to serious transmission failures.

When to replace this part?

Sacrificial anodes must be inspected at the beginning of each season and replaced when they have lost approximately 50% of their mass, since below that threshold their protection capacity decreases exponentially. Clear symptoms that the collar anode has reached its useful life are: clearly eroded surface, whitish coloration or spongy appearance of the zinc, appearance of pits or rust stains on the nearby stainless steel shaft, or simply visual verification that the collar has noticeably shrunk. In vessels that navigate in ports with high traffic density or with dispersed electrical current, consumption can be much faster, so it is recommended to carry out an additional inspection in the middle of the season; Replacing the anode preventively is always more economical than repairing a transmission shaft damaged by corrosion.

Compatibility