Electrolytic Corrosion: Also known as stray current corrosion, this occurs when dissimilar metals are in contact with an electrolyte, such as water, and an electrical source. The result can be a rapid reaction that can cause significant metal damage in a matter of hours or days.
Galvanic Corrosion: This occurs when two dissimilar metals are directly connected, causing the lesser of the two metals to corrode.
Marine Corrosion: This occurs when the salt in air and seawater leads to the chemical degradation of exposed metal surfaces.
Microbiologically Influenced Corrosion (MIC): This occurs when microbes are involved with corrosion.
Anodes are designed to help prevent corrosion from happening. They are typically made of zinc, magnesium, or aluminum and are usually located on trim tabs.