Paper Title:
Effect of Aluminising on the Hot Corrosion Resistance of Nickel-Chromium Alloys
  Abstract

The effects of aluminising on the hot corrosion resistance of two nickel-chromium alloys containing 10 and 30 weight percent chromium, respectively, were examined. The Ni/Cr specimens were aluminised by pack cementation in Ar and underwent cyclic hot corrosion testing in Na2SO4- NaCl molten salt. XRD analysis indicated that a NiAl phase formed between the coating layer and substrate. Cyclic hot corrosion test results indicated that the effects of aluminising are more pronounced in the case of the 10 % Cr than in the case of 30 % Cr. The ductile NiAl phase suppressed the potential for crack initiation during thermal cycling of the 10 % Cr specimens, and reinforced the hot cyclic corrosion resistance in molten salt for the 30 % Cr specimens.

  Info
Periodical
Materials Science Forum (Volumes 514-516)
Edited by
Paula Maria Vilarinho
Pages
505-509
DOI
10.4028/www.scientific.net/MSF.514-516.505
Citation
C. A.C. Sequeira, F. D.S. Marquis, "Effect of Aluminising on the Hot Corrosion Resistance of Nickel-Chromium Alloys", Materials Science Forum, Vols. 514-516, pp. 505-509, 2006
Online since
May 2006
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Price
$32.00
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