Paper Title:
In Situ Observation of Initial Corrosion of AZ91 Alloy with Residual Stress in Wet-Dry Conditions Using Environmental Scanning Electron Microscope
  Abstract

The corrosion of AZ91 magnesium alloy with residual stress was observed in-situ in an atmosphere of water vapor with cyclic wet-dry conditions using environmental scanning electron microscope (ESEM). The results showed that the oxygen concentration on the surface generally increased with the wetting time. And the average corrosion rate of AZ91 alloy with residual stress (RS) was much larger than that without RS, indicating RS accelerated corrosion. The corrosion localized at primary α-Mg area at short wetting time, but with the increase of wetting time spread to the eutectic α-Mg region. Small-size as-cast defects (<50μm) contributed little to the average corrosion rate while large-size as-cast defects (>100μm) influenced the distribution of water film and corrosion on the surface.

  Info
Periodical
Materials Science Forum (Volumes 546-549)
Edited by
Yafang Han et al.
Pages
537-542
DOI
10.4028/www.scientific.net/MSF.546-549.537
Citation
J. Chen, J. Q. Wang, E. H. Han, W. Ke, "In Situ Observation of Initial Corrosion of AZ91 Alloy with Residual Stress in Wet-Dry Conditions Using Environmental Scanning Electron Microscope", Materials Science Forum, Vols. 546-549, pp. 537-542, 2007
Online since
May 2007
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Su Qiu Jia, Guo Jun Liu, Qi Shuang Chen
Abstract:Mg-7.3Al magnesium alloys were investigated in the paper. The paper presents microstructural characterization of Mg-7.3Al alloy after casting...
585
Authors: Xiao Ping Luo, Lan Ting Xia, Ming Gang Zhang
Abstract:The effect of Cd and Sb addition on the microstructural and mechanical properties of as-cast AZ31 alloys was investigated and compared. The...
197
Authors: Ji Qiang Li, Jing Su, Zhi Xin Jia, Wen Liu, Li Jun Liu, Hong Bing Wu
Chapter 5: Advanced Machining and Materials Processing Technology
Abstract:The effect of misch metal and silicium additions to AZ31 magnesium alloy on the microstructure was investigated in this study. The results...
1047
Authors: Ping Wang, Fu Yin Han, Yong Sheng Wang, Lu Geng, Shao Feng Meng, Wei Liang
Chapter 5: Metal Alloy Materials
Abstract:The microstructure and mechanical properties of AZ61-4Si magnesium alloy before and after equal channel angular processing (ECAP) were...
602
Authors: Bao Liang Shi, Tian Jiao Luo, Rui Dong Liu, Xu Guang Dong, Jing Wang, Yuan Sheng Yang
Abstract:The influence of trace strontium (Sr) addition on the microstructure and mechanical properties of Mg-8Al-1Nd-0.5Zn was investigated with OM,...
282