Electrochemical behavior of low-pressure plasma-sprayed Al-Cu-Fe-Cr quasicrystalline coating

被引：12
|
作者：
Kang, YW [1 ]
Zhou, C [1 ]
Gong, SK [1 ]
Xu, HB [1 ]
机构：
[1] Beijing Univ Aeronaut & Astronaut, Dept Mat Sci & Engn, Beijing 100083, Peoples R China
来源：
VACUUM | 2005年 / 79卷 / 3-4期
关键词：
low-pressure plasma spray; Al-Cu-Fe-Cr quasicrystalline coating; corrosion;
D O I：
10.1016/j.vacuum.2005.03.002
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Al-Cu-Fe-Cr quasicrystalline coating was deposited on a substrate of stainless steel by low-pressure plasma spraying (LPPS) method. The corrosion behavior of such coating was studied by polarization in 1 mol/l H2SO4 and 0. 1 mol/l NaOH solutions at room temperature. The polarization curve shows that LPPS Al-Cu-Fe-Cr quasicrystalline coating can turn to passive state both in 1 mol/l H2SO4 Solution and in 0.1 mol/l NaOH solution. The corrosion resistance of the coating is poorer than that of bulk quasicrystal in 0. 1 mol/l NaOH solution. Also in strong alkaline solution the corrosion resistance of the coating is much poorer than single-phase austenitic stainless-steel 1Cr18Ni9Ti. In the later period of polarization, the Al2O3 layer formed on surface of the coating is destroyed by localized corrosion. (c) 2005 Elsevier Ltd. All rights reserved.
引用
收藏
页码：148 / 154
页数：7
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