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This course is a part of a package deal of nine courses in electricity and electronics onboard. 

 In this course, you will learn about galvanic corrosion and grounding. 

When two different metals are placed in a liquid that can conduct a current (a so-called electrolyte), a current will be drawn, which causes one metal to be destroyed. Saltwater could, for example, be such an electrolyte, and it can therefore cause corrosion in the boat. 

The corrosion is due to the electrochemical voltage range reviewed in the course. It also covers how galvanic current occurs.

The course also shows how to measure whether a galvanic current is flowing (and whether there is corrosion). Prevention of corrosion with corrosion zinc is also addressed, including its function, location, treatment, and grinding.

In addition to the galvanic current, grounding and ground plane are also reviewed in this course. Some types of equipment require grounding to function correctly. For example, radar and MF/HF radio. The function and necessity of the ground plane are reviewed and how it is connected and mounted correctly.