ANODO HELICE SIDE-POWER RETRACTIL Ø19 (A

Function and technical context

This propeller anode for retractable Side-Power thrusters with a diameter of 19 mm acts as sacrificial galvanic protection of the propeller assembly and bow or stern thruster shaft. It works within the retractable auxiliary propulsion system, exposing itself directly to sea or brackish water to rust rather than the higher-value metal components of the propellant. Its function is essential on boats with retractable Side-Power thrusters, since the aluminum or stainless steel propeller and shaft are extremely vulnerable to galvanic corrosion when continuously submerged. Without an anode in good condition, corrosion directly attacks the propeller hub, the shaft and the mechanical components of the propeller, which can cause structural failures, jams in the extension/retraction mechanism and costly repairs at the dock. The reference REC9446AL indicates that it is an anode made of aluminum alloy, the optimal choice for salt water and brine.

When to replace this part?

Sacrificial anodes should be visually inspected at least once a season, ideally at each beaching. The unequivocal sign that the anode needs immediate replacement is when it has lost more than 50% of its mass: it appears irregularly corroded, reduced in size or with completely consumed areas. If the anode is completely consumed or has disappeared, the retractable propeller is left unprotected and galvanic corrosion can advance rapidly on the shaft and propeller, especially in marinas with high density of vessels or eddy currents. It is recommended to replace the anode preventively at the beginning of each nautical season: the minimum cost of this component is not comparable to that of repairing or replacing the propeller assembly or the retractable thruster mechanism.

Compatibility