Development of an effective bactericide and CO2-corrosion inhibitor

Issue 24(2) 2019
Pages 52-58

N.Sh. Rzaeva1, V.M. Abbasov1, L.I. Aliyeva1, L.I. Nasibova2

1Institute of Petrochemical Processes named after acad. Yu.G. Memedaliyev of the National Academy of Sciences of Azerbaijan, Azerbaijan, AZ 1025, Baku

2Azerbaijan Technical University, Azerbaijan, AZ 1073 Baku

Keywords: CO2-corrosion, corrosion inhibitors, CO2-corrosion kinetics, nitrogen containing complexes of natural organic acids, 2-aminopyridine

Based on the acids of soybean oil and 2-aminoperidine, amide was synthesized on the basis of which and soybean oil acids the complex was obtained. 20% solution of this complex in 95% ethyl alcohol was prepared. The long-term effect of the inhibitor on the kinetics of CO2-corrosion during 304 hours was studied. At a concentration of 50, 100 and 200 mg/l, the degree of protection is 86.7; 99.6 and 99.7%, respectively. After 304 hours of testing, the electrodes were tested for 40 hours in an inhibitor free medium. It was established that the protective layer of the inhibitor formed during 304 hours of testing protects the metal without the inhibitory medium for another 40 hours. We also studied the effect of our reagent on the vital activity of sulfate-reducing bacteria. In the control medium, the H2S content was 272 mg/l concentration. The inhibitor was introduced into the medium in 5.50, 75, 100 and 150 mg/l concentrations, bactericidal effect was 78.1; 98.4; 100.0; 100.0%, respectively. The inhibitor proposed by us has also been established to have a high bactericidal effect. Thus, it was established that the new reagent is a highly effective inhibitor of corrosion (Z ≥ 99.6%) and bactericides (Z = 100.00%), at a concentration of ≥ 75 mg/l.