镁合金植酸转化膜的制备及其性能的研究  

A Study of Preparation and Performance of Phytic Acid Conversion Coating on Magnesium Alloy

作　　者：张庆芳[1] 邵忠财[1] 王明[1] 孟冬梅[2] 

机构地区：[1]沈阳理工大学环境与化学工程学院,辽宁沈阳110159 [2]沈阳鼓风机集团股份有限公司,辽宁沈阳110869

出　　处：《电镀与环保》2014年第4期35-38,共4页Electroplating & Pollution Control

摘　　要：采用化学转化方法在AZ91D镁合金表面制备一种环境友好型的植酸转化膜。通过对pH值、温度、反应时间、植酸的质量分数等因素的控制,进行单因素实验和正交实验。确定的最佳工艺条件为:植酸3%,NaF 3g/L,H3BO340g/L,Ce(NO3)3·6H2O 5g/L,pH值4.5。采用优化后的工艺,能够在镁合金基体表面获得宏观上淡灰、致密,微观上具有微细裂纹的膜层。XRD测试表明:该植酸转化膜的主要成分为MgH10O24P6和CeO2。耐蚀性测试表明:植酸转化膜能有效地提高镁合金的耐蚀性。An environment friendly phytic acid conversion coating was prepared on the surface of AZ91D magnesium alloy by chemical conversion.The single factor experiment and orthogonal experiments were conducted through controlling the factors of pH value,temperature,reaction time,phytic acid mass fraction,etc.The optimum process conditions are determined as follows：phytic acid 3 ％,NaF 3 g/L,H3BO3 40 g/L,Ce （NO3）3 · 6H2O 5 g/L,pH 4.5.By using the optimized process,a film,macroscopically grayish and compact,with fine cracks microscopically,can be obtained on the magnesium alloy substrate surface.XRD test shows that the main components of the phytic acid conversion coating are MgH10O24P6 and CeO2.The corrosion resistance test analysis shows that the phytic acid conversion coatings can effectively improve the corrosion resistance of magnesium alloy.

关 键 词：植酸 转化膜 耐蚀性 

分 类 号：TG174[金属学及工艺—金属表面处理]