Microstructure and Corrosion Properties of Plasma Electrolytic Oxide Coatings on AZ31 Magnesium Matrix Composite

被引：2
作者：
Cheon, Jinho [1 ]
Park, Yongho [2 ]
Park, Ikmin [2 ]
机构：
[1] Doosan Engine, Ctr Technol, Chang Won 641370, South Korea
[2] Pusan Natl Univ, Sch Mat Sci & Engn, Pusan 609735, South Korea
来源：
KOREAN JOURNAL OF METALS AND MATERIALS | 2011年 / 49卷 / 03期
关键词：
plasma electrolytic oxidation(PEO); Al(18)B(4)O(33)/AZ31 composite; corrosion resistance; AL(18)B(4)O(33)W/2024AL COMPOSITE; OXIDATION COATINGS; ALLOY; RESISTANCE;
D O I：
10.3365/KJMM.2011.49.3.270
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Plasma electrolytic oxidation (PEO) treatment was performed on squeeze cast AZ31 alloy and Al(18)B(4)O(33)w/AZ31 composite. Scanning electron microscope (SEM) was employed to characterize the surface morphology and cross-section microstructure of the coating. The phase structures of the PEO coating were analyzed by X-ray diffraction (XRD). The corrosion resistance of the PEO coating was evaluated by electrochemical method. The results showed that the Al(18)B(4)O(33) whisker on the surface of the composite was decomposed and MgAl(2)O(4) was formed in the PEO coating layer of Al(18)B(4)O(33)w/AZ31 composite during PEO treatment. As a result, the electrochemical corrosion potential of the PEO coated Al(18)B(4)O(33)w/AZ31 composite was increased compared with that of AZ31 alloy.
引用
收藏
页码：270 / 274
页数：5
相关论文
共 13 条
[1]  
[Anonymous], 2000, UHLIGS CORROSION HDB
[2]   Corrosion characterisation of alumina-magnesium metal matrix composites [J].
Bakkar, A. ;
Neubert, V. .
CORROSION SCIENCE, 2007, 49 (03) :1110-1130
[3]  
CHANG SY, 2007, J KOREAN INST MET MA, V17, P549
[4]   Corrosion resistance and wear resistance of plasma electrolytic oxidation coatings on metal matrix composites [J].
Cui, Shihai ;
Han, Jianmin ;
Du, Yongping ;
Li, Weijing .
SURFACE & COATINGS TECHNOLOGY, 2007, 201 (9-11) :5306-5309
[5]   Effect of surface pretreatment by acid pickling on the density of stannate conversion coatings formed on AZ91 D magnesium alloy [J].
Elsentriecy, Hassan H. ;
Azumi, Kazuhisa ;
Konno, Hidetaka .
SURFACE & COATINGS TECHNOLOGY, 2007, 202 (03) :532-537
[6]   The effect of YAG laser surface treatment on corrosion resistance of Al18B4O33w/2024Al composite [J].
Hu, J. ;
Wu, P. L. ;
Kong, L. C. ;
Liu, G. .
MATERIALS LETTERS, 2007, 61 (29) :5181-5183
[7]   Microstructure of laser melted Al18B4O33w/2024Al composite [J].
Hu, Jin ;
Liu, Gang ;
Zhang, Jixiu ;
Kong, Lingchao ;
Fei, Weidong .
APPLIED SURFACE SCIENCE, 2006, 253 (05) :2792-2795
[8]  
Jeon J, 2008, J KOREAN INST MET MA, V46, P304
[9]  
LEE JM, 2006, J KOREAN INST MET MA, V44, P648
[10]  
MORI J, 1990, AM CERAM SOC BULL, V69, P1172
12