Open AccessThe influence of carbon steel chemical composition on the biochemical activity of sessile sulfate-reducing bacteria
Author(s) -
Ekaterina Vyacheslavovesterova,
Aleksandr Grigorievich Verevkin,
Nataliya Vladimirovna Prokhorova
Publication year - 2021
Publication title -
samarskij naučnyj vestnik
Language(s) - English
Resource type - Journals
eISSN - 2782-3016
pISSN - 2309-4370
DOI - 10.17816/snv2021104113
Subject(s) - sulfate reducing bacteria , sulfate , corrosion , bacteria , metallurgy , chromium , chemical composition , iron bacteria , chemistry , sulfide , hydrogen sulfide , materials science , environmental chemistry , sulfur , biology , organic chemistry , genetics
The technogenic failure caused by biological corrosion of pipelines and other oilfield equipment is an urgent problem for all oil-producing countries of the world. It has been established that many types of corrosion are initiated by the development of sulfate-reducing bacteria on the inner pipe surfaces. This paper presents the results of model laboratory experiments aimed at assessing the effect of the chemical composition of pipeline steel on the number and biochemical activity of sulfate-reducing bacteria development on its surface. Three chromium-containing corrosion-resistant steels were selected for the experiment, steel samples alloyed with 1% manganese were used as control samples. The bacteria for model experiments, mostly belonging to the genus Desulfovibrio, were taken from the inner surface of the damaged pipe after exploitation at an oil field in the Samara Region. In model experiments a reliable influence of the chemical composition of pipe steel on the quantitative characteristics and biochemical activity of bacteria developing on its surface was established. The biochemical activity of sulfate-reducing bacteria, determined by the stimulation of hydrogen sulfide formation and a change in dehydrogenase activity, significantly depended on the chromium content. An increase in the chromium concentration in the tested steel samples by up to 5% reduced the number of sulfate-reducing bacteria and their biochemical activity. The experiments allow us only to make a conclusion about the influence of the chemical composition of pipe steels on the number and biochemical activity of sulfate-reducing bacteria, but do not reveal its resistance to bacterial corrosion.