目前,对以微孤氧化与水热复合处理镁合金提高其耐蚀性能的研究不多.采用该复合处理技术在AZ31B镁合金上制备了含有钙、磷的复合陶瓷膜层;利用XRD、SEM和EDS表征了陶瓷膜层的组成、微观形貌及元素分布特点;利用Tafel技术评价了陶瓷膜层在模拟体液中的耐蚀性能.结果表明:微弧氧化陶瓷膜层具有多孔结构,晶相物质为氧化镁;水热处理后膜层厚度变化不大,但粗糙度增大,并在表面生成了含有钙、磷的沉积物;水热处理使陶瓷膜层的耐蚀性进一步提高,在水热温度为100℃时,膜层耐蚀性最佳.
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