摘要
采用电化学测试技术研究了Ce对新研制的口腔用Ti-Fe-Mo-Mn-Nb-Zr合金在人工体液中耐腐蚀性能影响,采用浸泡试验探讨了Ce对Ti-Fe-Mo-Mn-Nb-Zr合金在不同pH值乳酸中耐腐蚀性能的影响。研究表明,含Ce与不含Ce的合金在Hank抯人工模拟体液浸泡的自腐蚀电位均高于0.42V,且随Ce加入量的增加合金的自腐蚀电位先降低再升高然后再降低;Ce的加入没有改变合金的阳极化曲线类型,均为典型的钝化类型阳极化;Ce的加入使合金在乳酸中的腐蚀由点蚀转变为点蚀和晶界腐蚀;原子发射光谱(ICP)分析表明随乳酸酸性增强,含Ce与不含Ce合金的耐腐蚀性能差异增大;Ce的加入不利于提高该材料在人工体液和乳酸中的耐腐蚀性能。如果为了提高合金力学性能,Ce的最佳加入量为0.1%(按质量)。
The effect of Cc on the corrosion of new Ti-Fe-Mo-Mn-Nb-Zr-type dental alloys in artificial humor and varying pH lactic acid were invertigated by electrochemical technical and immersion tests, respectively. The results show that the self-corrosion potentials of alloys with Cc or without Cc in Hank's fluid are above 0.42 V. The self-corrosion potential varies with the increase of Cc content; adding Cc does not change the type of polarization curve, which is of the typical passivation anodizing type-characteristic of both pitting and grain boundary corrosion in lactic acid rather than just pitting corrosion as is the case for alloys without Cc. The distinction changes with change of lactic acid concentration. Additions of Ce of up to 0.1 wt/% improves the mechanical properties of the alloy.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2004年第7期723-727,共5页
Rare Metal Materials and Engineering
基金
吉林大学创新基金资助项目(2001CX104)
