I see a lot of questions boating forums and much talk concerning corrosion, particularly on metal boats. Many people raise concerns about “electrolysis”, (https://en.wikipedia.org/wiki/Electrolysis) which is not what is going on and not the correct name for this process. It is better to identify the specific type of corrosion. Most often they are talking about galvanic corrosion or stray current corrosion. Galvanic corrosion is a specific process. https://en.wikipedia.org/wiki/Galvanic_corrosion and stray current corrosion is another type of corrosion. People often confuse stray current corrosion with galvanic. In addition, there is the ever-present metal corrosion, or simply called rust, in ferrous metals which is also a type of electrochemical corrosion. Some metals that are commonly used in boat building, such as aluminum and stainless steel, encounter their own corrosion related problems. For the wooden boat owner and builder there is a special kind of corrosion that occurs around metal fasteners, most often screws, embedded in wood, called by some woodburning.
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