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Metals 2016, 6(8), 175; doi:10.3390/met6080175

Correlation between Zn-Rich Phase and Corrosion/Oxidation Behavior of Sn–8Zn–3Bi Alloy

1
Tianjin Key Lab of Composite and Functional Materials, School of Materials Science and Engineering, Tianjin University, Tianjin 300350, China
2
School of Mechanical, Materials and Mechatronic Engineering, University of Wollongong, Wollongong, New South Wales 2522, Australia
*
Author to whom correspondence should be addressed.
Academic Editor: Soran Birosca
Received: 13 June 2016 / Revised: 13 July 2016 / Accepted: 20 July 2016 / Published: 25 July 2016
(This article belongs to the Special Issue Process-Structure-Property Relationships in Metals)
View Full-Text   |   Download PDF [4215 KB, uploaded 25 July 2016]   |  

Abstract

The microstructure of Sn–8Zn–3Bi alloy was refined by increasing the solidification rate and the correlation between Zn-rich phase and the corrosion/oxidation behavior of the alloy was investigated. The Zn-rich phase transforms from coarse flakes to fine needles dispersed in the β-Sn matrix with the increase of the cooling rate. The transformation of Zn-rich precipitates enhances the anticorrosive ability of Sn–8Zn–3Bi alloy in 3.5 wt.% NaCl solution. On the contrary, Sn–8Zn–3Bi alloy with a fine needle-like Zn-rich phase shows poor oxidation resistance under air atmosphere, due to the fast diffusion of Zn atoms in Sn matrix. View Full-Text
Keywords: Sn–Zn–Bi alloys; microstructure; Zn-rich phase; corrosion; oxidation Sn–Zn–Bi alloys; microstructure; Zn-rich phase; corrosion; oxidation
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Zhang, X.; Li, C.; Gao, Z.; Liu, Y.; Ma, Z.; Yu, L.; Li, H. Correlation between Zn-Rich Phase and Corrosion/Oxidation Behavior of Sn–8Zn–3Bi Alloy. Metals 2016, 6, 175.

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