Effect of surface nanostructuring of aluminum alloy on post plasma electrolytic oxidation

被引：25
|
作者：
Masiha, H. R. [1 ]
Bagheri, H. R. [1 ]
Gheytani, M. [1 ]
Aliofkhazraei, M. [1 ]
Rouhaghdam, A. Sabour [1 ]
Shahrabi, T. [1 ]
机构：
[1] Tarbiat Modares Univ, Fac Engn, Dept Mat Sci, Tehran, Iran
来源：
APPLIED SURFACE SCIENCE | 2014年 / 317卷
关键词：
Aluminum; Corrosion; Plasma electrolytic oxidation; Nanocrystallization; Wear; ELECTROCHEMICAL IMPEDANCE SPECTROSCOPY; NACL AQUEOUS-SOLUTION; PVD COATED STEELS; CORROSION BEHAVIOR; PITTING CORROSION; AL-ALLOYS; COATINGS; FILMS; LAYERS;
D O I：
10.1016/j.apsusc.2014.08.135
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
AAl230 aluminum alloy samples were coated by plasma electrolytic oxidation (PEO). The samples with and without surface mechanical attrition treatment (SMAT) were coated in phosphate- and silicate-based electrolytes and in the presence of Si3N4 nanoparticles. Besides, morphology and properties of the produced coatings were examined. To determine the corrosion resistance of the coatings, potentiodynamic polarization technique was used. All coated samples were subjected to wear test in order to compare coating wear properties of the SMATed and unSMATed samples. Then the effects of SMAT preprocessing and its duration on the properties of the coatings prepared by PEO were investigated. The results indicated that the mean coefficient of friction of the coated samples decreased by near 83% with respect to the uncoated (raw) samples. Furthermore, the SMATed samples showed thicker coatings as compared to unSMATed samples due to an increase in their matrix reactivity. (C) 2014 Elsevier B.V. All rights reserved.
引用
收藏
页码：962 / 969
页数：8
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