Erosion-Corrosion Attack of Metals at High Temperatures

高温下金属的侵蚀腐蚀

• 批准号: 9207532
• 负责人: Neil Birks
• 金额: $ 29.57万
• 依托单位: University of Pittsburgh
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1992
• 资助国家: 美国
• 起止时间: 1992-09-01 至 1996-02-29
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9207532&HistoricalAwards=false
• 关键词: Erosion; Corrosion; Attack; Metals; Temperatures

This research extends understanding of particle erosion-corrosion processes to metal alloy systems based on nickel, cobalt and iron. A wide variety of erosive conditions of particle loading, velocity, angle of incidence, and temperature are employed in the experiments in controlled gaseous environments. Mechanisms of deformation and heat evolution at the specimen surface are analyzed. Of particular interest is the possible development of concentration gradients near the alloy surface, internal oxidation, and extensive transient oxidation, all of which can contribute strongly to the failure of the alloys to form protective oxide layers. %%% Erosion-corrosion processes are responsible for serious material degradation in a wide range of industrial processes, including gas turbines and coal gasifiers. This research should aid in the design of alloys that resist this type of degradation.

该研究扩展了对颗粒冲刷腐蚀的理解 加工到基于镍、钴和铁的金属合金系统。 各种各样的侵蚀条件的颗粒负荷，速度， 实验中采用了入射角、温度等实验条件 在受控的气体环境中。 变形机制和 分析了试样表面的热演化。 特别 有趣的是浓度梯度的可能发展 近合金表面，内氧化，和广泛的瞬态 氧化，所有这些都可能导致 合金形成保护性氧化层。 %%% 侵蚀-腐蚀过程导致严重的材料 包括天然气在内的各种工业过程中的降解 涡轮机和煤气化器。 这项研究应该有助于 设计抵抗这种降解的合金。