Hydrogen embrittlement of a low carbon steel during slow strain testing in chloride solutions containing sulphate reducing bacteria

Abstract

The paper presents results of a laboratory investigation of the microbiological environment assisted stress corrosion cracking of carbon steel in chloride solutions. Carbon steel specimens were subjected to slow strain rate testing (SSRT) in an aqueous solution of 3·5% sodium chloride, with and without a microbiological culture. Specimens tested in the biotic (microbiological) conditions showed a considerable loss of ductility, as compared to those tested in abiotic conditions. Fractography of the specimens tested in abiotic solutions suggested features of only ductile failure (dimples), whereas those tested in biotic conditions also had features of brittle cracking. Results of SSRT tests of the specimens pre-subjected to the electrochemical conditions for hydrogen charging have indicated susceptibility of the steel to hydrogen assisted cracking, and therefore suggesting a role of microbial environment in promoting hydrogen assisted cracking.

Keywords

HYDROGEN EMBRITTLEMENT SULPHATE REDUCING BACTERIA MICROBIOLOGICALLY INDUCED CORROSION SLOW STRAIN RATE TESTING

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References

Videla

H. A.

: ‘Proc. Argentine—USA Workshop on Biodeterioration 7 (CONICET-NSF)’, (ed. Videla

H. A.

), 43; 1986, Sao Paulo, Brazil, Aquatec Quimica.

Borenstein

S. W.

, Mater. Perform., 1988, 27, 62.

Videla

H. A.

: ‘Manual of biocorrosion’, 8 and 5; 1996, Boca Raton, FL, CRC Press.

Heitz

: ‘A working party report on microbiological degradation of materials and methods of protection’, (ed. E. Heitz, A. D. Mercer, W. Sand and A. K. Tiller), 31; 1992, London, The Institute of Materials.

Fontana

M. G.

and Greene

N. D.

: ‘Corrosion engineering’; 1984, Maidenhead, UK, McGraw-Hill.

Singh Raman

R. K.

, Muddle

B. C.

and Cherry

B. W.

: in ‘Proc. 10th International Congress on Marine Corrosion and Biofouling’, Melbourne, February 1999, (ed. Lewis

), 229-236; 1999, DSTO, Aeronautical and Maritime Research Laboratory, DSTO-GD-0287.

Egan

and Clapp

: Proc. Corrosion and Prevention 1998, Hobart, Paper 38-066,1–6.

Linton

V. M.

, Laycock

N. J.

, Thomsen

S. J.

, Ling

S. Y.

and Sinathuraja

: Proc. Int. Conf. of ‘Failure analysis’, Melbourne, November 2002, Institute of Materials Engineering of Australia, CD-ROM.

Singh Raman

R. K.

and Muddle

B. C.

: Mater. Set Technot, 2003, 19, 642–645.

10.

Singh Raman

R. K.

and Muddle

B. C.

: Mater. Set Technot, 2003, 19, 1751–1754.

11.

Stoecker

J. G.

: Mater. Perform., 1995, 34, 49.

12.

Borenstein

S. W.

: Mater. Perform., 1991, 30, 52.

13.

Videla

H. A.

: Biofouling, 2000, 15, 37.

14.

Stott

J. F. D.

, Skerry

B. S.

and King

R. A.

: ‘Laboratory evaluation of materials for resistance to anaerobic corrosion caused by sulphate reducing bacteria: philosophy and practical design, the use of synthetic environments for corrosion testing’, ASTM STP 970, (ed. Francis

P. E.

and Lee

T. S.

), 98-111; 1988, Pittsburg, PA, ASTM.

15.

Javaherdashti

: Anti-Corros. Meth. Mater., 1999, 46 (3), 173–180.

16.

Videla

H. A.

: ‘Manual of biocorrosion’, 74–120; 1996, Boca Raton, CRC Press.

17.

Hamilton

W. A.

: Ann. Rev. Microbiot, 1985, 39, 195–217.

18.

Jeffrey

and Melchers

R. E.

: Corros. Mgmt, May 2002, 3–11.

19.

Spiedel

M. O.

and Fort

P. M.

, NACE-5, NACE Houston, 1977,57–60.

20.

Parkins

R. N.

, Slattery

P. W.

and Poulson

B. S.

: Corrosion — NACE, 1981, 37, 651.

21.

Singbeil

and Tromans

: J. Electrochem. Soc.: Electrochem. Set Technot, 1981, 128, 2065.

22.

H. H.

and Ghali

: J. Appt Electrochem., 1992, 22, 396.