黑龙江科技学院学报2012，Vol.22Issue(3)：311-314,4.
SO2／CO2气体对纯镁及AZ91D合金的保护行为
Protection behavior of SO2/CO2 gas for pure magnesium and AZ9! D alloy
摘要
Abstract
Aimed at exploring the mechanism by which gas protects pure magnesium and AZ91D alloy from oxidation and combustion, this paper introduces an investigation into the protection behavior of gas mixture with volume fraction of 3% SO2 and 97% CO2, as is the case with pure magnesium and AZ91D alloy in an open melting furnace. The analysis of mierostructures, chemical compositions, and phase compositions of surface film found on molten pure magnesium and AZ91 D alloy by scanning electron microscopy （SEM） with energy dispersive spectrometer （EDS） and X-ray diffraction （XRD）, shows that AZ91D behaving at 680 ℃ alloy has dense and coherent surface films with an average thickness of 2 μm, while pure magnesium has surface films with an average thickness of 1 μm. The gas mixture exerts a better protective effect on AZ91D alloy than on pure magnesium. Both pure magnesium and AZ91D alloy exhibit the surface films consisting of MgO, MgS and a small amount of C phases, together with ele- ments S, C, O and Mg, excluding a few elements A1 in AZ91D alloy.关键词
纯镁/AZ91D合金/S02／CO2气体/保护行为Key words
pure magnesium/AZ91D alloy/S02/CO2 gases/protection behavior分类
金属材料引用本文复制引用
梁维中,高秋,陈福,赵振华..SO2／CO2气体对纯镁及AZ91D合金的保护行为[J].黑龙江科技学院学报,2012,22(3):311-314,4.基金项目
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