ANODE FLEX FOLD 69`5mm.

Function and technical context

The 69.5 mm Flex Fold anode is a cathodic protection element designed to be integrated into foldable propulsion systems, acting as a sacrifice against galvanic corrosion that affects the submerged metals of the boat. It works in the transmission and propulsion system, protecting the folding propellers, shafts and adjacent metal components from the corrosive action of salt, brackish or fresh water. Its specific 69.5 mm geometry guarantees a precise fit on the Flex Fold type propellers, ensuring that the anode is correctly exposed to the electrolyte without interfering with the hydraulic operation of the blades. If this anode is depleted or not replaced in time, the structural metals of the propeller and shaft are left unprotected and begin to suffer pitting and accelerated corrosion, compromising the mechanical integrity of the propulsion system.

When to replace this part?

The symptoms that the anode has reached its useful life are evident to the naked eye: a reduction of more than 50% in its mass compared to the new state, a very irregular surface with advanced erosion or partial fragmentation indicate that it no longer offers sufficient protection. For boats in regular navigation, it is recommended to inspect the anodes at the beginning and end of each nautical season, with annual replacement as a preventive rule or sooner if wear requires it. Renewing the Flex Fold anode within the correct interval avoids costly repairs to the shaft or propeller, components whose machining or replacement costs much more than that of a replacement anode.