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Title:
The effect of current mode and discharge type on the corrosion resistance of plasma electrolytic oxidation (PEO) coated magnesium alloy AJ62
Author: Hussein RO; Zhang, Pu(张璞); Nie X; Xia Y(夏原); Northwood DO
Source: Surface & Coatings Technology
Issued Date: 2011
Volume: 206, Issue:7, Pages:1990-1997
Abstract: Magnesium alloys are increasingly being used as lightweight materials in the automotive, defense, electronics, biomaterial and aerospace industries. However, their inherently poor corrosion and wear resistance have, so far, limited their application. Plasma electrolytic oxidation (PEO) in an environmentally friendly aluminates electrolyte has been used to produce oxide coatings with thicknesses of similar to 80 mu m on an AJ62 magnesium alloy. Optical emission spectroscopy (OES) in the visible and near ultraviolet (NUV) band (285 nm-800 nm) was employed to characterize the PEO plasma. Scanning electron microscopy (SEM) and X-ray diffraction (XRD) were used to characterize the coated materials, and potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) in a 3.5% NaCl solution were used to determine the corrosion behavior. It was found that the plasma discharge behavior significantly influenced the microstructure and the morphology of the oxide coatings and, hence the corrosion resistance. The corrosion resistance of the coated alloy was increased by changing the current mode from unipolar to bipolar, where the strong plasma discharges had been reduced or eliminated. (C) 2011 Elsevier B.V. All rights reserved.
Keyword: Magnesium ; Corrosion ; Plasma Electrolyte Oxidation ; Oes ; Electrochemical Impedance Spectroscopy ; Mg Alloy ; Coatings ; Behavior ; Silicate ; Az91D ; Microstructure ; Aluminum
Language: 英语
Indexed Type: SCI ; EI
Corresponding Author: Nie, X (reprint author), Univ Windsor, Dept Mech Automot & Mat Engn, Windsor, ON N9B 3P4, Canada
Correspondent Email: xnie@uwindsor.ca; dnorthwo@uwindsor.ca
DOI: 10.1016/j.surfcoat.2011.08.060
Related URLs: 查看原文
DOC Type: Article
WOS Subject: Materials Science, Coatings & Films ; Physics, Applied
WOS Subject Extended: Materials Science ; Physics
WOS Keyword Plus: ELECTROCHEMICAL IMPEDANCE SPECTROSCOPY ; MG ALLOY ; COATINGS ; BEHAVIOR ; SILICATE ; AZ91D ; MICROSTRUCTURE ; ALUMINUM
WOS ID: WOS:000298711500072
ISSN: 0257-8972
Rank: [Hussein, RO; Zhang, P; Nie, X; Xia, Y; Northwood, DO] Univ Windsor, Dept Mech Automot & Mat Engn, Windsor, ON N9B 3P4, Canada; [Xia, Y] Chinese Acad Sci, Inst Mech, Beijing 100190, Peoples R China
Subject: Materials Science; Physics
Department: MAM镀层工艺力学与摩擦学
Classification: 二类/Q1
Citation statistics:
Content Type: 期刊论文
URI: http://dspace.imech.ac.cn/handle/311007/45138
Appears in Collections:先进制造工艺力学重点实验室_期刊论文

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Recommended Citation:
Hussein RO,Zhang P,Nie X,et al. The effect of current mode and discharge type on the corrosion resistance of plasma electrolytic oxidation (PEO) coated magnesium alloy AJ62[J]. Surface & Coatings Technology,2011-01-01,206(7):1990-1997.
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