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Title: Conditions under which cracks occur in modified 13% chromium steel in wet hydrogen sulfide environments

Abstract

Occurrence of cracks in an API 13% Cr steel, modified 13% Cr steel, and duplex stainless steel were compared in various wet, mild hydrogen sulfide (H{sub 2}S) environments. The conditions under which cracks occurred in the modified 13% Cr steel in oil and gas production environments were made clear. No cracks occurred if pH > depassivation pH (pH{sub d}) and redox potential of sulfur (E{sub S(red/ax)}) < pitting potential (V{sub c}). Hydrogen embrittlement-type cracks occurred in pH > Ph{sub d} and E{sub S(red/ax)} > V{sub c}. The pH inside the pit decreased drastically and hydrogen embrittlement occurred. Cracks of the hydrogen embrittlement type occurred if pH < pH{sub d} and threshold hydrogen concentration under which cracks occur (H{sub th}) < hydrogen concentration in steel (H{sub 0}). No cracks occurred if pH < pH{sub d} and H{sub th} > H{sub 0}.

Authors:
;
Publication Date:
Research Org.:
Nippon Steel Corp., Futtsu, Chiba (JP)
OSTI Identifier:
20075972
Resource Type:
Journal Article
Journal Name:
Corrosion (Houston)
Additional Journal Information:
Journal Volume: 56; Journal Issue: 5; Other Information: PBD: May 2000; Journal ID: ISSN 0010-9312
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 02 PETROLEUM; 03 NATURAL GAS; HYDROGEN EMBRITTLEMENT; CORROSION; STEEL-CR13; STAINLESS STEELS; PETROLEUM INDUSTRY; NATURAL GAS INDUSTRY; HYDROGEN SULFIDES; CRACKS; PH VALUE

Citation Formats

Hara, T., and Asahi, H. Conditions under which cracks occur in modified 13% chromium steel in wet hydrogen sulfide environments. United States: N. p., 2000. Web. doi:10.5006/1.3280558.
Hara, T., & Asahi, H. Conditions under which cracks occur in modified 13% chromium steel in wet hydrogen sulfide environments. United States. doi:10.5006/1.3280558.
Hara, T., and Asahi, H. Mon . "Conditions under which cracks occur in modified 13% chromium steel in wet hydrogen sulfide environments". United States. doi:10.5006/1.3280558.
@article{osti_20075972,
title = {Conditions under which cracks occur in modified 13% chromium steel in wet hydrogen sulfide environments},
author = {Hara, T. and Asahi, H.},
abstractNote = {Occurrence of cracks in an API 13% Cr steel, modified 13% Cr steel, and duplex stainless steel were compared in various wet, mild hydrogen sulfide (H{sub 2}S) environments. The conditions under which cracks occurred in the modified 13% Cr steel in oil and gas production environments were made clear. No cracks occurred if pH > depassivation pH (pH{sub d}) and redox potential of sulfur (E{sub S(red/ax)}) < pitting potential (V{sub c}). Hydrogen embrittlement-type cracks occurred in pH > Ph{sub d} and E{sub S(red/ax)} > V{sub c}. The pH inside the pit decreased drastically and hydrogen embrittlement occurred. Cracks of the hydrogen embrittlement type occurred if pH < pH{sub d} and threshold hydrogen concentration under which cracks occur (H{sub th}) < hydrogen concentration in steel (H{sub 0}). No cracks occurred if pH < pH{sub d} and H{sub th} > H{sub 0}.},
doi = {10.5006/1.3280558},
journal = {Corrosion (Houston)},
issn = {0010-9312},
number = 5,
volume = 56,
place = {United States},
year = {2000},
month = {5}
}