|About this Abstract
||Materials Science & Technology 2009
||Recent Advances in Structural Characterization of Materials
||Study of Oxide Scale and Carburization by Synchrotron X-Ray Microbeam
||Zuotao Zeng, Ken Natesan, Zhonghou Cai
|On-Site Speaker (Planned)
Carburization and metal dusting, a catastrophic carburizing corrosion, are long standing problems in energy conversion and production systems such as hydrogen production, fuel cells, and natural gas turbines. All alloys are generally protected from degradation by oxide scales that develop on the alloy surface at high temperatures. To minimize detrimental degradation, oxide scales need to be carefully studied and their composition and phases should be optimized to achieve high resistance in various corrosive environments. However, it is difficult to obtain local phase information of oxide scale by regular XRD. Therefore, we applied nanobeam X-ray analyses to study these localized corrosion and found that the scale is actually a mixture of oxides and metal particles although oxide scale is usually considered to consist simply of oxide phases. These metal nanoparticles play a key role not only for metal dusting in petrochemical but also for carburization in oxy-fuel environment.
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