Sproat Lake, Vancouver Island, BC

What is Electrolytic Corrosion?

What is Electrolytic Corrosion?

How can you Prevent Electrolytic Corrosion on your Boat’s Solar Inverter Charger based system?

  • What is Electrolytic Corrosion?
  • Our top 9 measures you can take to prevent Electrolytic Corrosion on your boat
  • Conclusion

What is Electrolytic Corrosion?

Electrolytic corrosion, also known as galvanic corrosion or dissimilar metal corrosion, occurs when two dissimilar metals are in contact with each other in the presence of an electrolyte (such as saltwater or even moist air). This creates a galvanic cell, where one metal acts as an anode and corrodes, while the other metal acts as a cathode and is protected. The electrolyte facilitates the flow of electrons between the metals, accelerating the corrosion process. In the context of a boat’s solar inverter charger system, which likely involves various metal components like aluminum, stainless steel, copper, and potentially others, it’s important to take steps to prevent electrolytic corrosion.

Our Top 9 Measures you can Take to Prevent it on your Boat

1. Use Corrosion-Resistant Materials:

Choose materials that are less prone to corrosion. For marine applications, stainless steel and aluminum are commonly used due to their corrosion resistance.

2. Isolate Dissimilar Metals:

Avoid direct contact between dissimilar metals whenever possible. Use insulating materials or coatings to separate metals and prevent electrical contact.

3. Install Sacrificial Anodes:

Sacrificial anodes are made of a more reactive metal, such as zinc, and are designed to corrode instead of critical components. Install these anodes strategically in the system to protect key components.

4. Apply Dielectric Grease:

Use dielectric grease on electrical connections to create a barrier that helps prevent the flow of electrons and minimizes the chance of galvanic corrosion.

5. Use Insulating Washers:

When connecting different metals, use insulating washers or bushings to prevent direct contact and reduce the risk of galvanic corrosion.

6. Regular Maintenance:

Regularly inspect your boat’s solar inverter charger system for signs of corrosion. Check connections, anodes, and other components and replace any corroded parts promptly.

7. Install Galvanic Isolators:

Galvanic isolators are devices designed to block low-level DC currents that cause galvanic corrosion. Installing these devices in the electrical system can help prevent corrosion. Check out our here available in our online store.

8. Isolation Transformers:

Isolation transformers are effective in breaking the electrical connection between the AC power source and the boat’s electrical system, preventing the flow of direct currents that contribute to galvanic corrosion. While they may be more expensive, their benefits in reducing corrosion risk can justify the cost, especially in marine environments. Check out our available here in our online store.

9. Bonding and Grounding:

Proper bonding and grounding of metal components can help create a unified electrical potential, reducing the potential for galvanic corrosion. By combining these preventive measures, you can significantly reduce the risk of electrolytic corrosion in your boat’s solar inverter charger system and extend the lifespan of its components. Regular inspections and maintenance are crucial to identify and address any issues promptly.

black and brown boat on the ocean


In conclusion, safeguarding a boat’s solar inverter charger system from electrolytic corrosion is vital for its longevity in the marine environment. Adopting preventive measures such as corrosion-resistant materials, isolating dissimilar metals, using sacrificial anodes, applying dielectric grease, insulating washers, regular maintenance, galvanic isolators, and an isolation transformer helps mitigate corrosion risk. These steps create a protective barrier against dissimilar metal interactions and stray currents, enhancing system durability and efficiency. Regular inspections are crucial for early issue detection. For inquiries and tailored solutions, contact IOTG Solar, providing expertise and essential devices for optimal system performance. Thinking of a system? Upgrading an existing system? Need Consultation? Give us a call or today!

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