Study on Scanning Micro-arc Oxidation Technology Applied to 2024 Aluminum Alloy

被引：7
|
作者：
Lu Peng-Xiang [1 ]
Wei Dong-Bo [1 ]
Guo Cheng-Bo [1 ]
Li Zhao-Long [1 ]
Di Shi-Chun [1 ]
机构：
[1] Harbin Inst Technol, Sch Mechatron Engn, Harbin 150001, Peoples R China
来源：
JOURNAL OF INORGANIC MATERIALS | 2013年 / 28卷 / 04期
关键词：
aluminium alloy; scanning micro-arc oxidation; ceramic coating; nano indentation; corrosion; PLASMA ELECTROLYTIC OXIDATION; COATINGS; MAGNESIUM;
D O I：
10.3724/SP.J.1077.2013.12156
中图分类号：
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The ceramic coating was formed on the part of the impaired surface of the 2024 alloy sample by scanning micro-arc oxidation using low pulsating power supply. It proposed a solution for local repairing impaired part of big workpiece using micro-arc oxidation technique. Microstructure and phase composition of coating were characterized by SEM, XRD and EDS. The nano indentation hardness and elastic modulus of coatings were tested by nano indenter. The corrosion resistance properties of coatings were determined by potentiodynamic polarization. The results show that under the continuous current mode, the bath voltage of scanning micro-arc oxidation (SMAO) raise fast and go into micro-arc oxidation stage immediately. The thickness of the coating formed by SMAO is 17 mu m after a single scanning, indicating SMAO has high film efficiency. The coating, mainly composed of alpha-Al2O3 and gamma-Al2O3, is dense in the inner layer and porous in the outer layer. There are a large number of micropores and micro-cracks on its surface. The nano indentation test results show that the nano indentation hardness and elastic modulus of coatings firstly increase and then decrease from interface to surface. The potentiodynamic polarization indicates that the SMAO and MAO coatings all have effective corrosion protective effect to 2024 aluminium alloy. And the MAO coating's performance is better than that of SMAO coating.
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收藏
页码：381 / 386
页数：6
相关论文
共 19 条
  • [1] Mechanical and barrier properties of MOCVD processed alumina coatings on Ti6Al4V titanium alloy
    Balcaen, Y.
    Radutoiu, N.
    Alexis, J.
    Beguin, J. -D.
    Lacroix, L.
    Samelor, D.
    Vahlas, C.
    [J]. SURFACE & COATINGS TECHNOLOGY, 2011, 206 (07): : 1684 - 1690
  • [2] Chen Sui-yuan, 2010, Journal of Northeastern University (Natural Science), V31, P1721
  • [3] Structural and optical properties of nanocrystalline CdSe and Al:CdSe thin films for photoelectrochemical application
    Gawali, Sanjay A.
    Bhosale, C. H.
    [J]. MATERIALS CHEMISTRY AND PHYSICS, 2011, 129 (03) : 751 - 755
  • [4] Jiang B.L., 2001, CHINESE J NONFERROUS, V11, P186
  • [5] Magnesium and its alloys applications in automotive industry
    Kulekci, Mustafa Kemal
    [J]. INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY, 2008, 39 (9-10): : 851 - 865
  • [6] LAI Yong-chun, 2000, TRIBOLOGY, V20, P304
  • [7] Characterization of Al2O3 ceramic coatings on 6063 aluminum alloy prepared in borate electrolytes by micro-arc oxidation
    Li, H. X.
    Rudnev, V. S.
    Zheng, X. H.
    Yarovaya, T. P.
    Song, R. G.
    [J]. JOURNAL OF ALLOYS AND COMPOUNDS, 2008, 462 (1-2) : 99 - 102
  • [8] Electrochemical corrosion behaviour of plasma electrolytic oxidation coatings on AM50 magnesium alloy formed in silicate and phosphate based electrolytes
    Liang, J.
    Srinivasan, P. Bala
    Blawert, C.
    Stoermer, M.
    Dietzel, W.
    [J]. ELECTROCHIMICA ACTA, 2009, 54 (14) : 3842 - 3850
  • [9] Incorporation of zirconia into coatings formed by DC plasma electrolytic oxidation of aluminium in nanoparticle suspensions
    Matykina, E.
    Arrabal, R.
    Monfort, F.
    Skeldon, P.
    Thompson, G. E.
    [J]. APPLIED SURFACE SCIENCE, 2008, 255 (05) : 2830 - 2839
  • [10] Dry sliding wear behaviour of magnesium oxide and zirconium oxide plasma electrolytic oxidation coated magnesium alloy
    Srinivasan, P. Bala
    Liang, J.
    Blawert, C.
    Dietzel, W.
    [J]. APPLIED SURFACE SCIENCE, 2010, 256 (10) : 3265 - 3273
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