Paper Title:
Metal Dusting and Oxidation at 593 and 704°C
  Abstract

Experiments involving metal dusting in carbonaceous atmosphere and oxidation in air have been carried out at 593 and 704oC using T22, T91 and 800 alloy steels. The effect of Cr on these two processes can be understood because of their compositions. In general, the resistance to both metal dusting up to 1000 hours and oxidation up to 456 hours has been found to improve with increase in Cr content from 2.36 to 21.6%. However, mechanisms change from spalling to oxide scale in oxidation and from uniform metal dusting to pitting in metal dusting as the amount of Cr increases in these steels. Pitting corrosion shows higher C carbon concentration in the pits than at locations away from the pits. A detailed analysis has been performed to evaluate the scale and spalled materials in terms of oxide characterization using XRD, AES, SEM, EDS on SEM, optical microscopy and TEM.

  Info
Periodical
Materials Science Forum (Volumes 539-543)
Main Theme
Edited by
T. Chandra, K. Tsuzaki, M. Militzer , C. Ravindran
Pages
4226-4231
DOI
10.4028/www.scientific.net/MSF.539-543.4226
Citation
S.K. Varma, A. Putrevu, M. Pasala, Z. Zeng, K. Natesan, "Metal Dusting and Oxidation at 593 and 704°C", Materials Science Forum, Vols. 539-543, pp. 4226-4231, 2007
Online since
March 2007
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$32.00
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