Erosion-Corrosion Attack of Metals at High Temperatures

本研究项目研究金属和合金在高温下受到侵蚀和腐蚀的恶化机制。在可控的大气条件下，纯金属和合金都暴露在硬颗粒侵蚀下。变量包括金属合金条件、冲击粒度、颗粒速度和冲击角度、侵蚀温度和气体气氛。研究了铬和氧化铝在合金上的行为，以及气流中存在的二氧化硫的影响。对侵蚀表面的性质进行了检查，以揭示浓度分布和金相结构的变化。

This research program addresses the mechanisms of deterioration of metals and alloys subjected to erosion and corrosion at high temperatures. Both pure metals and alloys are exposed to hard particle erosion under controlled atmospheric conditions. Variables include metal alloy condition, impacting particle size, particle velocity and impact angle, erosion temperature and gas atmosphere. The behavior of chromia and alumina scales on the alloys is under examination, as well as effects of sulfur dioxide present in the gas stream. The nature of the eroding surfaces are examined to reveal changes in concentration profiles and metallographic structure.