Susceptibility of Plasma nitrided 17-4 PH to sulfide stress sracking (SSC) in H2S-containing environments

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Authors

  • Mario S.D.R. Coseglio
  • Phil Dent
  • Chris Fowler

Colleges, School and Institutes

External organisations

  • Birmingham University
  • University of Manchester
  • Exova Corrosion Centre

Abstract

The selection of corrosion-resistant alloys for oilfield components has been a challenge for the oil and gas industry due to its complex interactions with environments containing hydrogen sulfide (H2S) and carbon dioxide (CO2). Field failures have been frequently attributed to sulfide stress cracking (SSC), which can occur due to the applied stress in the presence of H2S. The precipitation-hardening stainless steel 17-4 PH (H1150D) is a cost-effective alloy for some oilfield components due to its favourable combination of properties such as high strength, relatively high toughness, and good corrosion resistance. However, recent reports of failures at stress levels lower than the accepted limits poses a challenge for its application. Plasma nitriding is known to improve the surface strength of the 17-4 PH and the results from the present work suggests that the nitrided layer formed at low temperature can successfully increase the resistance to SSC for this material.

Details

Original languageEnglish
Title of host publicationCorrosion Conference and Expo 2017
Publication statusPublished - 30 Mar 2017
EventCorrosion Conference and Expo 2017 - New Orleans, United States
Duration: 26 Mar 201730 Mar 2017

Publication series

NameNACE - International Corrosion Conference Series
Volume5
ISSN (Print)0361-4409

Conference

ConferenceCorrosion Conference and Expo 2017
CountryUnited States
CityNew Orleans
Period26/03/1730/03/17

Keywords

  • 17-4 PH, Hydrogen sulfide, Plasma nitriding, Precipitation-hardening stainless steel, SSC, Sulfide stress cracking, UNS S17400