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锆基大块非晶合金及其晶化合金在0.5mol/L H₂SO₄中的腐蚀行为研究

The Corrosion Resistance of Zr-based Bulk Metallic Glasses and Its Crystalline States in 0.5mol/L H₂SO₄ Solution

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【Author】 HE Shun-rong1,2,CAI Li-ping1,MA Zhong-feng1,CHENG Shu-xia2,CHEN Shu-yu3(1.School of Materials Science and Engineering of HFUT,Hefei 230009,China;2.Department of Thermal Science and Energy Engineering of USTC,Hefei 230027,China;3.Center for Physical Science,University of Science and Technology of China,Hefei 230026,China)

【机构】合肥工业大学材料科学与工程学院；中国科学技术大学热科学与能源工程系；中国科学技术大学理化中心；

【摘要】根据合金的DSC曲线制定了Zr60Al15Ni25、Zr52.5Al10Ni10Cu15Be12.5和Zr65Al10Ni10Cu15等锆基大块非晶合金的等温退火工艺,获得了与非晶态合金具有相同成分的晶化合金。通过研究非晶态合金和晶化合金在0.5mol/L H2SO4中的极化曲线,结合扫描电镜(SEM)和能量散射X射线谱(EDS)分析,发现,在0.5mol/LH2SO4中非晶态合金和晶化合金都具有非常优异的耐腐蚀性能,但非晶合金的耐腐蚀性能要比晶化合金稍好。这主要是因为晶态合金的结构中不存在晶界、位错等缺陷,同时非晶态合金中的组元具有很高的活性,使合金更快地进入钝态。更多还原

【Abstract】 Crystalline alloys were obtained by isothermal annealing on the basis of the DSC of Zr60Al15Ni25、Zr52.5Al10Ni10Cu15Be12.5 and Zr65Al10Ni10Cu15 bulk metallic glasses.The analysis of polarization curves of BMGs and its crystalline states,combining SEM and EDS observation,SEM and EDS indicated that in 0.5mol/L H2SO4,both the BMGs and their crystalline alloys have a very good corrosion resistance.Compared with crystalline alloys,the BMGs have a better performance,it is due to the lack of grain boundaries,dislocations and other defects,and the higher active elements in the BMGs,the faster the alloys to passive state.更多还原