Often called “Boat Zincs”, Martyr Anodes are made of a specialized alloy using only high purity metals. Martyr anodes are pressure die-cast and manufactured to strict quality standards and are guaranteed to be manufactured to US Military Alloy Specifications. Martyr manufacture sacrificial zinc anodes, aluminum anodes, and magnesium anodes, all of which are proven to prevent boat corrosion. Martyr anodes protect outboard motors, sterndives, hull plates, rudders, propellers, shafts, shaft brackets, engines, and rudders.