《含稀土元素Ce的2Cr13不锈钢的电化学特性及抗菌性研究》》-毕业论文.doc

PAGE 18 内蒙古科技大学本科生 毕业论文 题 目：含稀土元素Ce的2Cr13不锈钢的电化学特性及抗菌性研究 学生姓名： 学 号： 专 业：金属材料工程 班 级：材料 班 指导教师： 教授 含稀土元素Ce的2Cr13不锈钢的电化学特性及抗菌性研究 摘 要 随着石油化工工业、军事工业及海洋开发的迅速发展，满足各种特殊功能要求的功能性不锈钢也应运而生。研究发现，适量的稀土元素添加到不锈钢中可以明显提高钢的性能。 本研究是在2Cr13不锈钢中加入稀土元素Ce，研究Ce对2Cr13不锈钢组织及耐腐蚀性能的影响。通过观察金相组织，研究稀土元素Ce对2Cr13不锈钢组织的影响；通过周期浸泡实验，自腐蚀电位检测，交流阻抗和极化曲线的测量分析，研究稀土Ce对2Cr13不锈钢耐腐蚀性能的影响；通过在2Cr13不锈钢表面培养大肠杆菌，记录含不同成分稀土Ce的2Cr13不锈钢表面大肠杆菌生长状况来研究其抗菌性。 通过实验与分析，结果表明：采用加入Fe-Ce中间合金的方法，可以控制稀土在不锈钢中残留量。稀土元素Ce能明显改善2Cr13不锈钢的组织，随着稀土含量增加，组织明显细化，而且钢中的夹杂物减少。稀土元素Ce的加入，提高了2Cr13不锈钢的耐化学腐蚀能力，腐蚀率明显下降。但随着浸泡时间的延长，试样的腐蚀率呈先增大后减小的趋势，这是因为在表面形成一层致密的钝化膜，阻止了试样表面与外界的接触，使耐蚀能力更加提高。 关键词：稀土元素Ce；2Cr13不锈钢；抗腐蚀性能；抗菌性能 Research of 2Cr13 stainless steel with rare earth elements Ce electrochemical properties and antibacterial Abstract As the petrochemical industry, military industry and the rapid development of ocean development, the stainless steel which meet the functional requirements of various special features of have been emerging. A new study shows that amount of rare earth element added to stainless steel can significantly improve performance. The study is add rare earth elements Ce to 2Cr13 stainless steel,then to discuss how rare earth elements Ce have an influence on structure and corrosion resistance of 2Cr13 stainless steel. By observing the microstructure, studying the rare earth elements Ce on the impact of 2Cr13 Stainless Steel. Through the cycle of immersion test, detection of the corrosion potential, impedance and polarization curve measurement and analysis, to study of rare earth elements Ce on corrosion resistance of 2Cr13 stainless steel. Taking a colon bacillus culture on the surface of 2Cr13 stainless steel,and then recording the growth conditions of colon bacillus on the surface of stainless steel to know for sure its antimicrobial. Through experiments and analysis, the result shows that using method of adding Fe-Ce alloy can control the rare earth in stainless steel residues. Rare earth element Ce can signific