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利用单辊甩带法制得非晶样品,研究了Y的添加量(0,0.5,1.0,1.5,at.%)对Mg-Zn-Ca非晶合金在模拟体液中腐蚀行为的影响,通过扫描电镜观察样品在模拟体液中浸泡不同时间(3 h,3 d,7 d)后的微观形貌,利用电化学工作站对样品浸泡前后的电化学性能进行了检测.结果表明:加入Y元素后Mg-Zn-Ca非晶合金在模拟体液中的腐蚀电位有了明显提高,随着Y添加量的增加,合金耐蚀性在1%Y时最强,当Y增加到1.5%时,合金耐蚀性有所下降.浸泡后的电化学实验显示浸泡3d后样品与未浸泡的样品相比腐蚀电流密度均有明显的下降,在浸泡7 d后添加1%Y的非晶合金腐蚀电流密度继续下降,而含1.5%Y元素的非晶合金的腐蚀电流密度却反而增大.样品耐蚀性能的恶化是由于Y元素的添加使浸泡后的样品表面形貌发生由网状结构到层片状结构的改变.
The influence of Y content (0,0.5,1.0,1.5, at.%) On the corrosion behavior of Mg-Zn-Ca amorphous alloy in simulated body fluid was studied by single roll rejection method. Electrochemical microscope was used to observe the microstructure of the samples immersed in simulated body fluid for different time (3 h, 3 d, 7 d), and the electrochemical performance of the samples before and after immersion was tested by electrochemical workstation.The results showed that Mg The corrosion potential of -Zn-Ca amorphous alloy in simulated body fluid has been significantly improved. With the increase of Y, the corrosion resistance of the alloy is the strongest at 1% Y. When Y is increased to 1.5%, the corrosion resistance of the alloy The electrochemical experiments after immersion showed that the corrosion current density of the samples after immersing for 3d was significantly lower than that of the samples without immersion, and the corrosion current densities of the amorphous alloys with addition of 1% Y after 7 days immersion continued to decrease , But the corrosion current density of the amorphous alloy containing 1.5% Y element increases instead.The corrosion resistance of the sample is deteriorated due to the addition of Y element to make the surface morphology of the soaked sample change from reticular structure to lamellar structure Change.