Assessment of Soil Biocorrosion Severeness on the Pipeline Locations

In assessing the soil corrosion activity on the pipeline locations caused by a combination of factors, the severity of microbiological indicators (number of sulfur cycle bacteria) was determined. Soils microbiological testing revealed the absence of sulfate-reducing bacteria and detected thiobacteria in different concentrations. Severity assessment of the soils biocorrosion activity allowed to identify a sufficiently high level of soil samples having a moderately corrosive activity. Correlation between soils biocorrosion activity criterion index and quantitative content thiobacteria of the soil was identified. The results suggest that thiobacteria play an important role in the corrosion development in underground metal pipelines and use the findings in validation preventive trends.