TZM合金电化学腐蚀行为研究（英文）

发布时间：2018-01-30 15:00

本文关键词： TZM合金腐蚀极化曲线电化学特性　出处：《稀有金属材料与工程》2017年05期 　论文类型：期刊论文

【摘要】：采用粉末冶金和轧制工艺制备出TZM合金和稀土镧掺杂的La-TZM合金,通过动电位极化研究合金电化学腐蚀行为,扫描电子显微镜观察、能谱定量分析表征腐蚀产物显微结构特征。保持Cl~-浓度不变分别探讨合金在中性、酸性、碱性介质中耐侵蚀能力。结果表明,TZM合金在中性和碱性介质中抗腐蚀性能优于La-TZM合金,而在酸性介质中La-TZM合金抗腐蚀性能优于TZM合金,两类合金抗腐蚀性均表现为酸性介质强于中性介质,碱性介质最弱。Cl~-有效破坏腐蚀表面形成的钝化膜,OH~-和Cl~-双重侵蚀促使两类合金晶间腐蚀加剧、粉末冶金制备的TZM合金及La-TZM合金对酸性介质具有良好的耐蚀性。
[Abstract]:TZM alloy and rare earth lanthanum doped La-TZM alloy were prepared by powder metallurgy and rolling process. Electrochemical corrosion behavior of the alloy was studied by potentiodynamic polarization and observed by scanning electron microscope. The microstructure of corrosion products was characterized by energy spectrum quantitative analysis. The corrosion resistance of the alloy in neutral, acidic and alkaline media was investigated by keeping the Cl-concentration unchanged. The results showed that the corrosion resistance of the alloy in neutral, acidic and alkaline media was determined. The corrosion resistance of TZM alloy is better than that of La-TZM alloy in neutral and alkaline medium, but the corrosion resistance of La-TZM alloy in acid medium is better than that of TZM alloy. The corrosion resistance of the two alloys is that the acidic medium is stronger than the neutral medium, and the alkaline medium is the weakest. Cl-effectively destroys the passivation film formed on the corrosion surface. The TZM alloy and La-TZM alloy prepared by powder metallurgy have good corrosion resistance to acid medium.
【作者单位】：西安建筑科技大学;功能材料加工国家地方联合工程研究中心;金堆城钼业股份有限公司;西安瑞福莱钨钼有限公司;澳大利亚卧龙岗大学;
【基金】：The Science and Technology Coordinating Innovative Engineering Project of the Shaanxi Province(2015KTZDGY09-04) The Third Science and Technology Innovation Fund Project of the Western Metal Materials Co.,Ltd(XBCL-3-21) The Technology Transfer Projects in Colleges and Universities of Xi’an Science and Technology Plan(CXY1521(3)) Young Talent Fund of University Association for Science and Technology in Shaanxi,China(20150201) Service Local Special Program of Education Department of Shaanxi Province,China(16JF016)
【分类号】：TG178
【正文快照】： A Titanium-Zirconium-Molybdenum(TZM)alloy formeddesirable mechanical properties at high temperature and highby adding a small amount of Ti and Zr and trace elements of Cpressure,due to the grain refinement of lanthanum oxidein an Mo matrix has a high mel

【相似文献】