Paper Title:
Effect of Heat Treatment on the Corrosion Resistance of Cast Mg-7.3Al Alloy
  Abstract

Mg-7.3Al magnesium alloys were investigated in the paper. The paper presents microstructural characterization of Mg-7.3Al alloy after casting and heat treatment. The casting temperature was 740°C and heat treatment was performed at 420 °C for 24 h with aging at 180 °C for 8h,16h,24h. The microstructure of the casting alloy consists of α-Mg phase matrix with a primary β phase (Mg17Al12) at grain boundaries. After solution treatment β phases were soluted in α-Mg phase matrix . Aging treatment caused β phases precipitation. The corrosion resistance of magnesium alloy was determined in 3.5 % NaCl by immersion tests and polarization curves. The results shows that the corrosion resistance of magnesium alloy after solution treat is the best than that of the others heat treatment in polarization curve tests and the samples with aging for 16h and 24h presents higher corrosion resistance than those with solution and aging for 8h in immersion tests. Solution treatment plays a main role for corrosion resistance of Mg-7.3Al magnesium alloy in short term corrosion, but more continuous β phases in Mg-7.3Al alloy after ageing act as a barrier and play a main role in long term corrosion.

  Info
Periodical
Advanced Materials Research (Volumes 146-147)
Edited by
Sihai Jiao, Zhengyi Jiang and Jinglong Bu
Pages
585-588
DOI
10.4028/www.scientific.net/AMR.146-147.585
Citation
S. Q. Jia, G. J. Liu, Q. S. Chen, "Effect of Heat Treatment on the Corrosion Resistance of Cast Mg-7.3Al Alloy", Advanced Materials Research, Vols. 146-147, pp. 585-588, 2011
Online since
October 2010
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: Xin Hong Xiong, Hong Tao Li, Jian Kang Cai, Guo Xian Wang, Qiao Xin Zhang
Chapter 1: Metals and Alloys, Processing Technologies
Abstract:This paper addresses the collective effects of aging treatment and addition of SiC particles (SiCp) on both the compression performance and...
33