March 3, 2026

Investigation on the Influence of Sn on the Microstructure and Corrosion Behavior of Mg–0.8% Si Alloy

Key Points

Corrosion resistance improved significantly, with enhancements of 14–17 times observed with Sn.
Addition of Sn refined the microstructure, particularly affecting Mg2Si morphology and distribution.
The alloy consisted of α-Mg, Mg2Si, and Mg2Sn, with the latter found concentrated at grain boundaries.
Significant findings highlight that beyond 8% Sn, corrosion resistance achieved limited improvements.

Abstract

This study investigated the microstructural and corrosion resistance modifications in Mg–0.8% Si alloy with Sn addition. Sn effectively refined Mg2Si morphology and distribution. Mg–8% Sn–0.8% Si consisted of α-Mg, Mg2Si, and Mg2Sn phases, with Mg2Sn enriched at grain boundaries. Sn significantly enhanced corrosion resistance by 14–17 times, with limited improvement beyond 8% Sn. Mg2Sn formation, SnO2 layer, and fine Mg2Si barrier contributed to improved corrosion resistance.

Bookmark

Investigation on the Influence of Sn on the Microstructure and Corrosion Behavior of Mg–0.8% Si Alloy

Key Points

Abstract

Cite This Study