Role of alloyed Nd in the microstructure and atmospheric corrosion of as-cast magnesium alloy AZ91

被引：88
作者：
Arrabal, R. [1 ]
Mingo, B. [1 ]
Pardo, A. [1 ]
Matykina, E. [1 ]
Mohedano, M. [2 ]
Merino, M. C. [1 ]
Rivas, A. [3 ]
Maroto, A. [3 ]
机构：
[1] Univ Complutense, Fac Ciencias Quim, Dept Ciencia Mat, E-28040 Madrid, Spain
[2] Helmholtz Zentrum Geesthacht, Magnesium Innovat Ctr, Inst Mat Res, D-21502 Geesthacht, Germany
[3] Fdn CIDAUT, Dept Aleac Ligeras, Valladolid 47151, Spain
来源：
CORROSION SCIENCE | 2015年 / 97卷
关键词：
A; Magnesium; Alloy; B; AFM; C. Atmospheric corrosion; MECHANICAL-PROPERTIES; BEHAVIOR; RESISTANCE; NEODYMIUM; AM50; IMPROVEMENT; ALUMINUM; GD;
D O I：
10.1016/j.corsci.2015.04.004
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The influence of Nd on the atmospheric corrosion performance of AZ91 alloy was evaluated as per PV1210 standard. Additionally, immersion and electrochemical measurements were carried out. The beneficial effect of Nd is associated with: (i) suppressed galvanic corrosion between alpha-Mg and secondary phases, (ii) refined beta-phase morphology and (iii) increased proportion of carbonates in the outer surface layer. In case of atmospheric corrosion, the role of beta-phase is the least important factor out of the three. The optimum Nd content is 0.5 wt.%. Further additions do not improve significantly the corrosion performance. (C) 2015 Elsevier Ltd. All rights reserved.
引用
收藏
页码：38 / 48
页数：11
相关论文
共 34 条
  • [1] Corrosion resistance of WE43 and AZ91D magnesium alloys with phosphate PEO coatings
    Arrabal, R.
    Matykina, E.
    Viejo, F.
    Skeldon, P.
    Thompson, G. E.
    [J]. CORROSION SCIENCE, 2008, 50 (06) : 1744 - 1752
  • [2] Influence of Gd on the Corrosion Behavior of AM50 and AZ91D Magnesium Alloys
    Arrabal, R.
    Pardo, A.
    Merino, M. C.
    Paucar, K.
    Mohedano, M.
    Casajus, P.
    Garces, G.
    [J]. CORROSION, 2012, 68 (05) : 398 - 410
  • [3] Corrosion behaviour of AZ91D and AM50 magnesium alloys with Nd and Gd additions in humid environments
    Arrabal, R.
    Matykina, E.
    Pardo, A.
    Merino, M. C.
    Paucar, K.
    Mohedano, M.
    Casajus, P.
    [J]. CORROSION SCIENCE, 2012, 55 : 351 - 362
  • [4] Effect of Nd on the corrosion behaviour of AM50 and AZ91D magnesium alloys in 3.5 wt.% NaCl solution
    Arrabal, R.
    Pardo, A.
    Merino, M. C.
    Mohedano, M.
    Casajus, P.
    Paucar, K.
    Garces, G.
    [J]. CORROSION SCIENCE, 2012, 55 : 301 - 312
  • [5] Corrosion behaviour of Mg/Al alloys in high humidity atmospheres
    Arrabal, R.
    Pardo, A.
    Merino, M. C.
    Merino, S.
    Mohedano, M.
    Casajus, P.
    [J]. MATERIALS AND CORROSION-WERKSTOFFE UND KORROSION, 2011, 62 (04): : 326 - 334
  • [6] Influence of cerium on the microstructure, mechanical properties and corrosion resistance of magnesium alloy
    Fan, Yu
    Wu, Guohua
    Zhai, Chunquan
    [J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2006, 433 (1-2): : 208 - 215
  • [7] Feliu Jr S., 2010, OPEN CORROS J, V3
  • [8] XPS study of the effect of aluminium on the atmospheric corrosion of the AZ31 magnesium alloy
    Feliu, S., Jr.
    Merino, M. C.
    Arrabal, R.
    Coy, A. E.
    Matykina, E.
    [J]. SURFACE AND INTERFACE ANALYSIS, 2009, 41 (03) : 143 - 150
  • [9] Correlation between the surface chemistry and the atmospheric corrosion of AZ31, AZ80 and AZ91D magnesium alloys
    Feliu, S., Jr.
    Pardo, A.
    Merino, M. C.
    Coy, A. E.
    Viejo, F.
    Arrabal, R.
    [J]. APPLIED SURFACE SCIENCE, 2009, 255 (07) : 4102 - 4108
  • [10] Jonsson M., 2007, INFLUENCE MICROSTRUC
1234