Corrosion behaviour of Mg/Al alloys with composite coatings

被引：45
|
作者：
Pardo, A. [1 ]
Merino, M. C. [1 ]
Mohedano, M. [1 ]
Casajus, P. [1 ]
Coy, A. E. [2 ]
Arrabal, R. [1 ]
机构：
[1] Univ Complutense, Fac Quim, Dept Ciencia Mat, E-28040 Madrid, Spain
[2] Univ Manchester, Sch Mat, Ctr Corros & Protect, Manchester M60 1QD, Lancs, England
来源：
SURFACE & COATINGS TECHNOLOGY | 2009年 / 203卷 / 09期
关键词：
Magnesium alloys; Al/SiC coatings; Corrosion; Composites; Thermal spraying; THERMAL SPRAY COATINGS; AL-SICP COMPOSITES; WEAR BEHAVIOR; ALUMINUM; MICROSTRUCTURE;
D O I：
10.1016/j.surfcoat.2008.10.030
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The corrosion behaviour of aluminium/silicon carbide (Al/SiC) composite coatings deposited by thermal spray on AZ31, AZ80 and AZ91D magnesium-aluminium alloys was investigated by electrochemical and gravimetric measurements in 3.5 wt.% NaCl solution at 22 degrees C. Corrosion products were examined by scanning electron microscopy (SEM), energy dispersive X-ray (EDX) analysis and low-angle X-ray diffraction (XRD). Al/SiC composite coatings in the as-sprayed state revealed high level of porosity with poor bonding at the Al/SiC and coating/substrate interfaces, which facilitated degradation of the magnesium substrates by a mechanism of galvanic corrosion. Cold-pressing post-treatment produced more compact coatings with improved corrosion performance in 3.5 wt.% NaCl compared with as-sprayed coatings. (C) 2008 Elsevier B.V. All rights reserved.
引用
收藏
页码：1252 / 1263
页数：12
相关论文
共 50 条
  • [1] Electrochemical corrosion behaviour of Mg-Al alloys with thermal spray Al/SiCp composite coatings
    Pardo, A.
    Feliu, S., Jr.
    Merino, M. C.
    Mohedano, M.
    Casajus, P.
    Arrabal, R.
    REVISTA DE METALURGIA, 2010, 46 (02) : 129 - 142
  • [2] Corrosion behaviour of Mg-rich Al coatings in the protection of Al alloys
    Liu, Liming
    Xu, Rongzheng
    Song, Gang
    SURFACE & COATINGS TECHNOLOGY, 2010, 205 (02): : 332 - 337
  • [3] Corrosion behaviour of Mg-Al alloys with Al-11Si thermal spray coatings
    Pardo, A.
    Merino, M. C.
    Casajus, P.
    Mohedano, M.
    Arrabal, R.
    Matykina, E.
    MATERIALS AND CORROSION-WERKSTOFFE UND KORROSION, 2009, 60 (12): : 939 - 948
  • [4] Comparison of corrosion behaviour of pef and peo coatings on mg alloys
    Qi, Yu-Ming
    Liu, Si-Qin
    Luo, Lan
    Peng, Zhen-Jun
    Liang, Jun
    Wang, Peng
    Surface Technology, 2021, 50 (06): : 41 - 54
  • [5] Corrosion behaviour of Mg/Al alloys in high humidity atmospheres
    Arrabal, R.
    Pardo, A.
    Merino, M. C.
    Merino, S.
    Mohedano, M.
    Casajus, P.
    MATERIALS AND CORROSION-WERKSTOFFE UND KORROSION, 2011, 62 (04): : 326 - 334
  • [6] Corrosion inhibition performance of polypyrrole Al flake composite coatings for Al alloys
    Yan, Maocheng
    Vetter, Christopher A.
    Gelling, Victoria J.
    CORROSION SCIENCE, 2013, 70 : 37 - 45
  • [7] Corrosion protection of Mg/Al alloys by thermal sprayed aluminium coatings
    Pardo, A.
    Casajus, P.
    Mohedano, M.
    Coy, A. E.
    Viejo, F.
    Torres, B.
    Matykina, E.
    APPLIED SURFACE SCIENCE, 2009, 255 (15) : 6968 - 6977
  • [8] Corrosion Properties of Oxide Ceramic Coatings Based on Alloys of the Al–Cu–Mg and Al–Mg Systems
    L. M. Bilyi
    V. M. Posuvailo
    V. R. Ivashkiv
    I. V. Kovalchuk
    Materials Science, 2021, 57 : 256 - 263
  • [9] Corrosion and electrochemical behaviour of Mg-Al alloys and Mg-RE alloys in NaCl solution
    Ding, Wen-Jiang
    Xiang, Ya-Zhen
    Chang, Jian-Wei
    Peng, Ying-Hong
    Zhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals, 2009, 19 (10): : 1713 - 1719
  • [10] Influence of the microstructure on the corrosion behaviour of cast Mg-Al alloys
    Grimm, Michael
    Lohmueller, Andreas
    Singer, Robert F.
    Virtanen, Sannakaisa
    CORROSION SCIENCE, 2019, 155 : 195 - 208
12345