This specification covers the standard requirements for magnesium alloy anodes in the form of cast and extruded shapes for use in cathodic protection. Materials shall adhere to specified chemical composition requirements, the samples for analysis of which shall be taken either from the molten metal when the cast anode or extrusion ingot is poured, or from the finished anode. Anodes shall have a clean surface and be commercially free of dirt, slag, or other foreign material.