Correlation between Zn-Rich Phase and corrosion/oxidation behavior of Sn-8Zn-3Bi alloy

Authors

Xin Zhang, Tianjin UniversityFollow
Chong Li, Tianjin University
Zhiming Gao, Tianjin UniversityFollow
Yongchang Liu, Tianjin University, Nankai University
Zongqing Ma, University of WollongongFollow
Liming Yu, Tianjin University
Hui Jun Li, University of WollongongFollow

RIS ID

109325

Publication Details

Zhang, X., Li, C., Gao, Z., Liu, Y., Ma, Z., Yu, L. & Li, H. (2016). Correlation between Zn-Rich Phase and corrosion/oxidation behavior of Sn-8Zn-3Bi alloy. Metals, 6 (8), 175-1-175-9.

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.