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材料工程  2011 

植酸浓度对AZ31B镁合金植酸转化膜防腐性能的影响

, PP. 45-49

Keywords: 植酸,浓度,镁合金,转化膜,防腐

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Abstract:

在不同浓度的植酸溶液中制备了AZ31B镁合金植酸转化试样,并应用析氢实验及Tafel极化曲线测试其防腐性能,使用SEM,EDS,FTIR观察转化膜形貌、元素组成及官能团构成。结果表明植酸溶液的浓度对植酸转化试样的防腐性能具有较大的影响,C=4.0g·L-1时所制备的转化试样具有最佳的防腐性能,电流密度较未处理试样降低了2个数量级。此外,植酸转化膜主要由Mg,Al,Zn,O,P等元素组成,并含有PO43-,HPO42-,OH-基团,转化膜存在一定的裂纹,且裂纹处仍有很薄的一层植酸转化膜。

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