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用失重法、收集氢气、电子探针合金成分分析和腐蚀形貌观察等方法，研究了ＡＺ６３和ＡＺ４１镁合金及纯镁在水中的析氢行为。结果表明：在淡水中镁阳极处于活性溶解状态；淡水中镁阳极上的析氢速度与电流密度呈线性关系，这与在０．５ｍｏｌ／ＬＮａＣｌ＋Ｍｇ（ＯＨ）２（ｐＨ＝１０．２）溶液中的情况类似，但负差异效应常数小于纯镁在０．５ｍｏｌ／ＬＮａＣｌ＋Ｍｇ（ＯＨ）２溶液中的数值；析氢不是镁阳极电流效率不高的唯一原因，阳极溶解过程中发生颗粒状脱落是其中的又一原因。
The hydrogen evolution behavior of AZ63 and AZ41 magnesium alloy and pure magnesium in water was studied by weight loss method, hydrogen collection, composition analysis of electron probe alloy and observation of corrosion morphology. The results showed that the magnesium anode was active dissolved in freshwater, and the linear relationship between the hydrogen evolution rate and the current density was found in freshwater magnesium anode. This is in agreement with the current density in 0.5mol / L NaCl + Mg (OH) 2 (pH = 10.2) But the negative difference effect constant is smaller than the value of pure magnesium in 0.5mol / L NaCl + Mg (OH) 2 solution. Hydrogen evolution is not the only reason for the low efficiency of magnesium anode current. Particle shedding during anodic dissolution is one of them A reason.