为了探讨转化温度对镁合金防腐蚀性能的影响，应用析氢试验、Tafel分析法及SEM，EDS，FTIR研究了不同植酸液温度所形成的转化膜的防腐蚀性能及表面微观形貌、元素组成及官能团构成。结果表明转化温度对镁合金植酸转化膜的防腐蚀性能有较大的影响：在较低范围内，转化膜的防腐蚀性能随着温度的升高而增加，转化温度为40℃时，转化膜防腐蚀性能最佳，此后随着温度的进一步提高，转化膜的防腐蚀性能随之下降。镁合金植酸转化膜为较薄的致密内层及具有一定裂纹的外层所组成，主要成分Mg，Al，Zn，C，O，P等元素，并含有PO4^3-，HPO4^2-及OH^-基团。
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