Electrochemical noise analysis of the corrosion of high-purity Mg-Al alloys

被引：22
|
作者：
Casajus, Paula [1 ]
Winzer, Nicholas [1 ]
机构：
[1] Fraunhofer Inst Mech Mat IWM, D-79108 Freiburg, Germany
来源：
CORROSION SCIENCE | 2015年 / 94卷
关键词：
Magnesium; Alloy; Pitting corrosion; Passive films; AZ91D MAGNESIUM ALLOY; ATMOSPHERIC CORROSION; LOCALIZED CORROSION; BETA-PHASE; BEHAVIOR; MICROSTRUCTURE; RESISTANCE; AM50; AZ31; ND;
D O I：
10.1016/j.corsci.2015.02.014
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Corrosion of high-purity Mg-Al alloys containing 3, 6 and 9 wt.% Al was investigated using electrochemical noise (EN) analysis. Changes in the EN signals were correlated with macroscopically observable events on the sample surfaces, which were recorded using time-lapse photography. Steady-state corrosion in all alloys was highly localised. For the Mg3%Al alloy, localised corrosion was preceeded by a period of general corrosion. The corrosion rate of the as-cast Mg9%Al alloy was less than those of the other materials but increased with solution annealing time. The results are consistent with strong galvanic coupling between Al-depleted and -enriched zones of the a-phase. (C) 2015 Elsevier Ltd. All rights reserved.
引用
收藏
页码：316 / 326
页数：11
相关论文
共 50 条
  • [11] Fractography of stress corrosion cracking of mg-al alloys
    Winzer, Nicholas
    Atrens, A.
    Dietzel, W.
    Song, G.
    Kainer, K. U.
    METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 2008, 39A (05): : 1157 - 1173
  • [12] Thermal analysis of the Mg-Al alloys
    Medved, J
    Mrvar, P
    SOLIDIFICATION AND GRAVITY IV, 2006, 508 : 603 - 608
  • [13] Fractography of Stress Corrosion Cracking of Mg-Al Alloys
    Nicholas Winzer
    A. Atrens
    W. Dietzel
    G. Song
    K.U. Kainer
    Metallurgical and Materials Transactions A, 2008, 39 : 1157 - 1173
  • [14] The Influence of SO2 on the Corrosion of Mg and Mg-Al Alloys
    Esmaily, M.
    Blucher, D. B.
    Lindstrom, R. W.
    Svensson, J. -E.
    Johansson, L. G.
    JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 2015, 162 (06) : C260 - C269
  • [15] Effect of Al addition on corrosion behavior of high-purity Mg in terms of processing history
    Woo, Sang Kyu
    Suh, Byeong-Chan
    Kim, Ha Sik
    Yim, Chang Dong
    JOURNAL OF MAGNESIUM AND ALLOYS, 2023, 11 (03) : 851 - 868
  • [16] Effect of Al addition on corrosion behavior of high-purity Mg in terms of processing history
    Sang Kyu Woo
    ByeongChan Suh
    Ha Sik Kim
    Chang Dong Yim
    Journal of Magnesium and Alloys, 2023, 11 (03) : 851 - 868
  • [17] Effect of Al addition on corrosion behavior of high-purity Mg in terms of processing history
    Sang Kyu Woo
    Byeong-Chan Suh
    Ha Sik Kim
    Chang Dong Yim
    Journal of Magnesium and Alloys, 2023, (03) : 851 - 868
  • [18] Effect of Mn on grain size of high-purity Mg-3Al alloys
    Wang, Chun-Jian
    Jin, Qing-Lin
    Zhou, Rong
    Jiang, Ye-Hua
    Zhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals, 2010, 20 (08): : 1495 - 1500
  • [19] On the Role of β Particles in Stress Corrosion Cracking of Mg-Al Alloys
    N. Winzer
    C.E. Cross
    Metallurgical and Materials Transactions A, 2009, 40 : 273 - 274
  • [20] Characterisation of stress corrosion cracking (SCC) of Mg-Al alloys
    Winzer, N.
    Atrensa, A.
    Dietzel, W.
    Raja, V. S.
    Song, G.
    Kainer, K. U.
    MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2008, 488 (1-2): : 339 - 351
12345