热处理对镁钙合金在模拟体液中降解行为的影响

Effect of Heat Treatment on Degradation Behavior of Mg-Ca Alloys in Simulated Body Fluid

该文研究了300℃退火0 h、6 h、12 h、24 h、48 h、72 h的铸态Mg-0.8Ca合金的在模拟体液(Simulated Body Fluid,SBF)中的腐蚀降解行为。经过对镁钙合金显微组织和浸泡后的失重和合金形貌进行分析和研究,结果表明:300℃退火48 h后的合金,在模拟体液中浸泡后合金点腐蚀明显,腐蚀表面相对较平整,合金的耐腐蚀性好。腐蚀速率为0.6607×10^(-4) g/cm^(2)·h,是未经热处理合金的54.6%。

The corrosion degradation behavior of as cast Mg-0.8Ca alloy annealed at 300℃for 0 h,6 h,12 h,24 h,48 h and 72 h in Simulated body fluid(SBF)was investigated.After analyzing and studying the microstructure,weight loss and morphology of Mg-Ca alloy after soaking,the results show that the alloy annealed at 300℃for 48 h has obvious pitting corrosion,relatively flat corrosion surface and good corrosion resistance after immersion in simulated body fluid.The corrosion rate is 0.6607×10^(-4)g/cm^(2)·h,which is 54.6%of the alloy without heat treatment.