If you have current flow (electron movement), where are the electrons moving through?

Electrons move through a metal when an electric current flows due to the conductive properties of metals. In conductive materials like copper or aluminum, which are commonly used in marine applications, the electrons can move relatively freely, which allows for efficient transfer of electric current. This property is essential in a marine environment, particularly when considering the potential for corrosion, as different metals in contact can lead to galvanic action when there is a flow of current.

While options such as the solution or air might influence corrosion processes (for instance, in electrolysis or the formation of corrosion cells), the primary pathway for the flow of electric current is through the conductive medium—metal in this case. Understanding this relationship is crucial for addressing issues related to marine corrosion and the design of electrical systems in boats and other aquatic vehicles.