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1 2007

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Effect of steel microstructure on bacteria-assisted hydrogen effects at cathodic polarization in sea water

Łunarska E., Domżalicki P., Birn J.

Advances in Materials Science

2007

Vol. 7, nr 1(11)

160-165

The effect of the SRB action on mechanical properties and hydrogen uptake by the steels of quite similar chemical composition but different microstructure bas been studied at cathodic polarization in synthetic sea water. Susceptibility of sorbite steel to the SRB action, as seen from the plasticity los s and hydrogen uptake was higher than that of ferrite-pearlite steels. The sorbite steel revealed also the highest polarization current, highest amount of S.2 in solution and the highest amount of S on the surface of metal tested in the presence of SRB. The made pronounced detrimental effect of SRB produced on sorbite steel was mostly accounted for the presence of Mn, Fe sulfides in the steel microstructure.