Journal of Materials for Energy Systems

, Volume 5, Issue 1, pp 59–66 | Cite as

Corrosion behavior of 25 Pct Cr duplex stainless steel in CO2-H2S-Cl− environments

  • S. Mukai
  • H. Okamoto
  • T. Kudo
  • A. Ikeda
Article

Abstract

Effects of environmental factors and alloying elements on corrosion behavior of duplex stainless steels in CO2-H2S-Cl− environments were investigated, and the corrosion resistance of DP3® Alloy (25Cr-7Ni-3Mo), which has been developed for hot sea water heat exchangers, was compared with that of other materials.

The corrosion resistance of duplex stainless steels increased with the increase of Cr, Ni, and Mo contents in CO2-H2S-Cl− and CO2-Cl− environments. SCC occurred on duplex stainless steels with Ni content below 6 pct, even in the H2S-free conditions at high temperature. Low-temperature aging treatment increased the susceptibility to SCC of duplex stainless steels with lower Ni content.

DP3 alloy is resistant to SCC at least up to the temperature of 250 ‡C (480 ‡F) in CO2-Cl− environments, though the application of this alloy to H2S environments is limited.

Keywords

Corrosion Behavior Stress Corrosion Crack Duplex Stainless Steel Threshold Stress Type 317L 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
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Copyright information

© American Society for Metals 1983

Authors and Affiliations

  • S. Mukai
    • 1
  • H. Okamoto
    • 1
  • T. Kudo
    • 1
  • A. Ikeda
    • 1
  1. 1.Central Research LaboratoriesSumitomo Metal Industries, Ltd.AmagasakiJapan

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