Comparison of the corrosion ratio of carbon steel pipes buried in sandy soil due to cathodic protection and sandy soils with added ratios of $\text{Na}_2\text{SO}_4$ Salt

Abstract

The purpose of this study was to compare the corrosion ratio of carbon steel pipes buried in sandy soil of cathodic protection and sandy soils with an added ratio of sodium sulphur $\text{Na}_2\text{SO}_4$ for two periods of half a year and one year from September 2016 to September 2017, as well as comparison soils, i.e., burying in untreated sandy soils. This aim was conducted to determine which of these methods are the most effective in inhibition the corrosion, The results Show that the: pipelines protected by cathodic protection during the half year and one year periods were 1.143% and 1.748%, respectively, compared with the control soil pipelines which recorded 13.441% and 26.069% for the half and one year periods. As for the pipelines buried in soils with certain added ratios 73% of sodium sulphate, the soils were less efficient in corrosion prevention and the results were 7.131% and 18.312% for the two periods of half-year and one-year. Thus, the treatment of sand soils with cathodic protection has proven corrosion of carbon steel pipes. In addition, the causes of corrosion in carbon steel pipes and soil germination tests were also studied to detect the types of corrosive bacteria. The following species of bacteria, such as Pseudomonas, Proteus and Enterobacter, were observed in different conditions of pH.