Use of Magnesium Alloy Anodes in Ship Protection

This paper describes the results of a 14 month test of magnesium alloy anodes in sea water. The current from the anodes was used to protect cathodically an inactive Algerine Class minesweeper. The results obtained show that it is practical to use magnesium alloy anodes in ship protection and that only a relatively small current is required to prevent the corrosion of underwater hulls of inactive ships. A convenient criterion to determine the amount of current required is given.