Paper Title:
Discussion on the Mechanism of Corrosion Resistance of High Temperature QPQ Treated Specimens in H2S Environment
  Abstract

By constant stress tensile test, the corrosion mechanism of high temperature QPQ treated 25CrMnMo steel specimen in H2S environment was analyzed and discussed. The γ′-Fe4N in the ε compound layer turns into corrosion substance in the test and expands. At the surface of the ε compound layer, the corrosion layer is visible. The compound layer breaks off in little blocks for volume expansion of the corrosion substance and the exterior tensile stress. The coefficient of diffusion of hydrogen atom in the ε compound layer is very low, that decrease the probability of the hydrogen-induced corrosion of high temperature QPQ treated specimens in H2S environment.

  Info
Periodical
Edited by
Honghua Tan
Pages
665-668
DOI
10.4028/www.scientific.net/AMM.66-68.665
Citation
Y. H. Li, S. P. Zhang, Y. C. Ding, Z. L. Jiang, "Discussion on the Mechanism of Corrosion Resistance of High Temperature QPQ Treated Specimens in H2S Environment", Applied Mechanics and Materials, Vols. 66-68, pp. 665-668, 2011
Online since
July 2011
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