Paper Title:
Corrosion Behavior of Twin-Wire Metal Inert Gas Arc Welds in 7A52 Al Alloy Plate
  Abstract

Abstract. 7A52 aluminum alloy plate was welded using twin-wire metal inert gas arc welding (TANDEM welding). Corrosion behavior of the welded joint was investigated by immersion in 3.5% NaCl solution. Scanning electron microscopy (SEM) and electrochemical inspections, specifically, polarization curves and electrochemical impedance spectroscopy (EIS), were conducted to understand corrosion behavior of the TANDEM welding joint of 7A52 aluminum alloy. It was found that the heat affected zone (HAZ) exhibited higher corrosion susceptibility than the weld beam (WB), fusion zone (FZ) and base metal (BM). The electrochemical results showed that the WB with higher corrosion potential and larger impedance had highest corrosion resistance. Variations in the composition and grain size might have led to the differences in corrosion resistance because the welding process influenced microstructures of the TANDEM welding joint of 7A52 aluminum.

  Info
Periodical
Advanced Materials Research (Volumes 314-316)
Chapter
Mechanical Behavior & Fracture
Edited by
Jian Gao
Pages
918-922
DOI
10.4028/www.scientific.net/AMR.314-316.918
Citation
X. W. Zhai, F. R. Chen, R. L. Jia, X. D. Wang, "Corrosion Behavior of Twin-Wire Metal Inert Gas Arc Welds in 7A52 Al Alloy Plate", Advanced Materials Research, Vols. 314-316, pp. 918-922, 2011
Online since
August 2011
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Price
$32.00
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