Monitoring systems

Galvanic corrosion monitoring systems are essential tools for preventative maintenance of your marine engine. Galvanic corrosion is an electrochemical process that occurs when dissimilar metals are immersed in an electrolyte, such as seawater, creating an electrical potential difference. This difference initiates a current flow that corrodes the less noble metal, compromising the integrity of the engine and its components.

Monitoring systems, such as those offered by Tecnoseal and available at Nautica Basile, allow you to accurately measure the electrical potential between the engine and the surrounding water. This measurement allows you to assess the effectiveness of sacrificial anodes, elements designed to corrode instead of the engine's more critical components. Regular checks with a monitoring system enable you to identify any anomalies promptly and replace the anodes before corrosion damages the engine block, heat exchangers, propellers, or steering gear. Consider using plant monitoring and remote control for enhanced oversight.

Why monitor galvanic corrosion?

Galvanic corrosion can cause significant damage to various engine parts:

* Engine block: Corrosion can weaken the engine block's structure, leading to cracks and leaks.
* Heat exchangers: Corrosion can reduce the efficiency of heat exchangers, causing engine overheating.
* Propellers: Corrosion can damage propellers, reducing their efficiency and increasing fuel consumption.
* Steering gear: Corrosion can compromise the functionality of the steering gear, making boat maneuvering difficult.

A monitoring system alerts you to potential problems promptly, allowing you to intervene before the damage becomes irreparable and expensive.

The Nautica Basile Workshop Tip

* Check the monitoring system regularly, especially after long voyages in saltwater or prolonged stays in port.
* Replace sacrificial anodes when the monitoring system indicates a potential that is too low. Always use high-quality anodes, specific to your engine type and the environment in which you navigate.
* Ensure that all electrical connections of the monitoring system are clean, tight, and protected from corrosion.
* Consider installing a digital voltmeter for continuous and accurate monitoring of the electrical potential.

• Fast shipping throughout Italy directly from Nautica Basile.


• Official Tecnoseal and all distributed brands warranty.


• Qualified technical assistance for installation and maintenance.

Combine the monitoring system with new Tecnoseal sacrificial anodes, available at Nautica Basile, for complete and lasting protection of your marine engine. Also, check the condition of the engine anodes already installed.

What is galvanic corrosion and why is it dangerous for my marine engine?

Galvanic corrosion occurs when two different metals are immersed in an electrolyte (such as salt water) and an electrical potential difference is created. This can lead to accelerated corrosion of the less noble metal, severely damaging the engine, heat exchangers, and other vital components. Corrosion can lead to sudden failures and costly repairs.

How does a galvanic corrosion monitoring system work?

A monitoring system measures the electrical potential between the engine and the surrounding water. This allows you to assess the effectiveness of the sacrificial anodes and intervene promptly if the potential drops below safe levels, indicating that the anodes are being depleted.

Where should I install the monitoring system?

The monitoring system should be installed in an easily accessible location for reading the values. The sensor should be immersed in water, preferably near the seacock or engine exhaust, to detect the actual electrical potential in the environment in which the engine operates.

How often should I check the monitoring system?

It is recommended to check the monitoring system at least once a month, and more frequently (for example, after each sea trip) if you navigate in particularly aggressive waters or if you notice anomalies in the engine's operation. Regular checks allow you to identify any problems promptly and intervene before they cause major damage.

What are the advantages of using a galvanic corrosion monitoring system?

The advantages include preventing costly engine damage, increasing component life, reducing downtime, increasing safety at sea, and saving on long-term maintenance costs. A monitoring system offers peace of mind and protection for your investment.

What should I do if the monitoring system indicates a potential that is too low?

If the monitoring system indicates a potential that is too low, you must replace the sacrificial anodes immediately. Before doing so, verify that the monitoring system is properly installed and functioning. If the problem persists, consult a qualified marine mechanic.