The initial micro-galvanic corrosion behavior of Mg‒30wt%Ca alloy only containing Mg₂Ca and α-Mg was studied by immersion testing in a 0.9% NaCl solution at 37 °C. The quasi-in situ SEM and TEM results show that Mg₂Ca corroded easier than α-Mg, indicating that Mg₂Ca acted as an anode. The work function (Φ) for Mg₂Ca calculated by first-principles is significantly lower compared to that for α-Mg. The Volta potential measured by a scanning Kelvin probe force microscope reveals that the Mg₂Ca had a relatively low Volta potential (ψ) value. The lower Φ and ψ values for Mg₂Ca indicate a lower electrochemical nobility, which is consistent with the experimental phenomenon.

通过在 37 °C 的 0.9% NaCl 溶液中浸泡测试，研究了仅包含 Mg ₂ Ca 和 α-Mg的 Mg-30wt%Ca 合金的初始微电腐蚀行为。准原位SEM和TEM结果表明Mg ₂ Ca比α-Mg更容易被腐蚀，表明Mg ₂ Ca作为阳极。与α-Mg 相比，通过第一性原理计算的Mg ₂ Ca的功函数(Φ)明显较低。通过扫描开尔文探针力显微镜测量的伏打电势表明Mg ₂ Ca具有相对低的伏打电势(ψ)值。_{Mg 2} Ca的较低 Φ 和 ψ 值表明较低的电化学惰性，这与实验现象一致。