Corrosion behavior of as-cast Mg–5Sn based alloys with In additions in 3.5 wt% NaCl solution. (March 2020)

• Record Type: Journal Article
• Authors: Wang, Xuejian; Chen, Zongning; Ren, Jing; Kang, Huijun; Guo, Enyu; Li, Jiehua; Wang, Tongmin
• Is Part Of: Corrosion science. Volume 164(2020)
• Publication Date: 2020-03
• Subjects: Magnesium alloy -- In -- Electrochemical test -- Corrosion behavior; Corrosion and anti-corrosives -- Periodicals; 620.11223
• DOI: 10.1016/j.corsci.2019.108318
• Languages: English
• ISSNs: 0010-938X

Abstract

Highlights: The i cathodic of Mg-5Sn alloy was reduced through In additions. In relieved the driving force of Mg2 Sn phase for the microgalvanic corrosion. A protective corrosion layer was formed on the surface of the alloys with In additions. In altered the corrosion process of Mg-5Sn alloy. Abstract: The corrosion behavior of as-cast Mg–5Sn– x In ( x = 0, 1, 2, 3, 4, all in wt%) alloys in 3.5 wt% NaCl solution was investigated using weight loss, hydrogen evolution and electrochemical test. The results showed that the microstructures of all alloys consisted of typical coarse dendrites without the presence of any In-rich phase. The corrosion resistance of Mg–5Sn– x In alloys was enhanced monotonously with increasing In content up to 3 wt%. The electrochemical measurements revealed that such improvements could be mainly attributed to the retardation of cathodic reaction, decreasing the rate of hydrogen evolution.