Environmentally assisted cracking and hydrogen diffusion in traditional and high-strength pipeline steels

Author:

Cabrini Marina1,Lorenzi Sergio1,Pellegrini Simone1,Pastore Tommaso1

Affiliation:

1. 1Department of Engineering and Applied Sciences, University of Bergamo, Italy

Abstract

AbstractThis article deals with the risk of environmentally assisted cracking of steel structures that are kept under cathodic protection (CP). The experimental results collected on both hydrogen diffusion and hydrogen embrittlement (HE) of high-strength low-alloy (HSLA) steels under CP are discussed. Hydrogen diffusion was evaluated by permeation experiments and a scanning photoelectrochemical current technique, as a function of microstructure orientation, on both loaded and unloaded specimens. HE tests were carried out under constant load, slow strain rate (SSR tests), and slow bending conditions. Tests were also carried out on several grades of HSLA steel having different microstructures. The results confirm that HE in artificial seawater under CP can occur in steel with tensile yield strength in the range of 400–660 MPa only in the presence of high cathodic polarization and continuous plastically straining conditions. HE susceptibility increased with increasing applied cathodic polarization and with decreasing strain rate. HE susceptibility of the rolled steels at relatively high strain rate (10-4 to 10-5 s-1) increased with the hydrogen diffusion coefficient. Similar results were observed in terms of the HE contribution to corrosion fatigue crack growth rate. High-temperature-tempered martensitic steels showed a lower HE susceptibility.

Publisher

Walter de Gruyter GmbH

Subject

General Materials Science,General Chemical Engineering,General Chemistry

Reference246 articles.

1. Hydrogen embrittlement of steel with an alternate ferrite pearlite banded structure;Lee;Mater Sci Eng,1991

2. Tau Effects of ferrite / pearlite alignment on the hydrogen permeation in a steel;Chan;Mater Lett,1996

3. Influenza degli ioni solfuro sulla permeazione di idrogeno in acciai ad alta resistenza In convegno nazionale AIM AIM CD;Zucchi,2004

4. Effect of cathodic potential and strain rate on hydrogen embrittlement of HSLA steels In editors Hydrogen effects on materials behavior and corrosion deformation interactions Warrendale PA;Cabrini,2003

5. Sulfide stress corrosion of some medium and low alloy steels;Snape;Corrosion,1967

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