材料科学
涂层
微观结构
腐蚀
冶金
等离子体电解氧化
镁合金
镁
合金
复合材料
电解质
电极
化学
物理化学
作者
Jie Ma,Yuansheng Yang,Xiu Chun Wang,Jing Zhang,Shuo Liu,Xi Bin Yi
出处
期刊:Key Engineering Materials
日期:2013-09-01
卷期号:575-576: 418-422
被引量:1
标识
DOI:10.4028/www.scientific.net/kem.575-576.418
摘要
Microarc oxidation coating and microarc oxidation-fluorocarbon coating were prepared on the surface of AZ80 magnesium alloy profiles. The phase structure, surface morphology and corrosion resistance of the coatings were investigated using SEM, XRD, copper sulfate spot test and polarization curve test. The main phase compositions of the microarc oxidation coatings were MgO, Mg 2 SiO 4 , MgSiO 3 , MgF 2 and MgAl 2 O 4 . With increasing pulse voltage, the oxidation coating became thicker and the microstructure of the coating surface became compact; therefore the coating corrosion resistance was improved. The oxidation coating with pulse voltage of microarc oxidation controlled between 300-438V obtained the best corrosion resistance. The corrosion current density of magnesium alloy reduced 1-3 orders of magnitude after microarc oxidation treatment with increasing pulse voltage, and the corrosion resistance of microarc oxidation-fluorocarbon coating is desirable.
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