This document specifies the electrochemical performance test of magnesium alloy sacrificial anode samples when working in the medium of calcium sulfate and magnesium hydroxide. This document is applicable to the simulated buried anode filling environment with saturated calcium sulfate and magnesium oxide test electrolyte. Electrochemical performance test of magnesium alloy sacrificial anode (hereinafter referred to as buried anode). The test of electrochemical performance of magnesium alloy sacrificial anodes for water heaters used in fresh water (hereinafter referred to as water heater anodes) can be used as a reference.