Metal dusting behavior of 321 stainless steel: Effects of edge and corner

Chia Hao Chang, Wen Ta Tsai

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


The metal dusting behavior of 321 stainless steel (SS) in a flowing mixed CO/H2/H2O gas stream at 600 °C for 500 h and 1000 h was investigated. The microstructures and chemical compositions of the reaction products at the surface and those in the substrate under the pits were examined by using a scanning electron microscope (SEM) and a transmission electron microscope (TEM), each combined with an energy dispersive spectrometer (EDS). The phenomenon of a pitting attack that occurred preferentially at the edges and corners of the specimens was the focus of this study. The carburization behavior in the steel substrate under the pits was also characterized. Matrix carbide in the form of Cr7C3 and grain boundary carbide in the form of Cr23C6 were identified by TEM.

Original languageEnglish
Pages (from-to)267-273
Number of pages7
JournalMetals and Materials International
Issue number2
Publication statusPublished - 2011 Apr

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Mechanics of Materials
  • Metals and Alloys
  • Materials Chemistry

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