alexa Aluminum Surface Treatment for Improved Bonding of Magn
ISSN: 2169-0022

Journal of Material Sciences & Engineering
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Research Article

Aluminum Surface Treatment for Improved Bonding of Magnesium/ Aluminum Bi-Metallic Casting

Yiqing Chen1*, Hao Zhang1, Alan Luo2, Anil.K.Sachdev2, Guangchen Xu1 and Da Chen1

1School of Materials Science and Engineering, Hefei University of Technology, Hefei, China

2Chemical Sciences and Materials Systems Lab, General Motors Research & Development Center, 30500 Mound Road, Warren, USA

*Corresponding Author:
Yiqing Chen
School of Materials Science and Engineering
Hefei University of Technology, Hefei, Anhui 230009, China
E-mail: [email protected]

Received Date: June 14, 2012; Accepted Date: July 23, 2012; Published Date: July 30, 2012

Citation: Chen Y, Zhang H, Luo A, Sachdev AK, Xu G, et al. (2012) Aluminum Surface Treatment for Improved Bonding of Magnesium/Aluminum Bi-Metallic Casting. J Material Sci Eng 1:110. doi: 10.4172/2169-0022.1000110

Copyright: © 2012 Chen Y, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

 

Abstract

Magnesium/aluminum bi-metallic castings offer significant mass saving opportunities in automotive structural applications. A “zincate+galvanizing” surface treatment has been developed for aluminum alloys to provide improved wetting and metallurgical bond with molten magnesium in bi-metallic casting, due to the removal of Al2O3 layer and the formation of with a very thin metallic zinc film on the aluminum surfaces. The bi-metallic experiments using a selfdesigned high-vacuum test apparatus provided valuable understanding of the interfacial phenomena of Mg (AM60)/ Al (6061) bi-metallic samples. The test results show significantly improved shear strength in the bi-metallic samples with “zincate+galvanizing” surface treatment. It is recommended to adjust the pre-heating temperature and time of the aluminum substrates to control the interfacial reactions for optimum interfacial properties in the actual bi-metallic casting processes.

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