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Evaluation of environment-assisted cracking susceptibility of a grade X100 pipeline steel

Lookup NU author(s): Alhaji Mustapha, Dr Alasdair Charles

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Abstract

Susceptibility of as-received grade X100 steel was compared to that of simulated and seam-weld heat-affected zone microstructures by slow strain rate testing in a sodium hydrogen carbonate-sodium carbonate solution at 75 degrees C over a potential range of -500 to -1100 mV vs. standard calomel electrode (sce). Heat treatment has an effect on the resistance of the steel to environment-assisted cracking. Stress corrosion cracking at anodic potentials was intergranular (IG) and became transgranular (TG) as the free corrosion potential of -890 mV (sce) was approached. At cathodic potentials, transgranular hydrogen embrittlement occurred with faster growth rates up to 1.4 x 10(-5) mm/s and less secondary cracking. (C) 2011 Elsevier Ltd. All rights reserved.

Publication metadata

Author(s): Mustapha A, Charles EA, Hardie D

Publication type: Article

Publication status: Published

Journal: Corrosion Science

Year: 2012

Volume: 54

Pages: 5-9

Print publication date: 27/08/2011

ISSN (print): 0010-938X

ISSN (electronic): 1879-0496

Publisher: Pergamon

URL: http://dx.doi.org/10.1016/j.corsci.2011.08.030

DOI: 10.1016/j.corsci.2011.08.030

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