Abstract
Chemical and microbiological analyses of samples of drainage waters (Tatarstan oil-exploration sites) has revealed several parameters influencing the development of chemical and microbial-induced types of corrosion. Availability of all conditions for developing microorganisms present in oil-processing waters was established. A method allowing for rapid identifying sulfate-reducing bacteria and determining their concentrations in field conditions was developed.
Antimicrobial properties of biocides and corrosion inhibitors were characterized by direct conventional methods using pure test cultures and associations of corrosive microorganisms. It was shown that some corrosion inhibitors have antimicrobial properties. It has been found that antimicrobial properties of some reagents can markedly change under influence of chemical compounds that are present in oil-processing waters. Three synergistic combinations allowing reduction of biocidal concentrations of individual reagents by several times were established.
The procedure of cultivation of biofilms on the metallic surfaces including compositions of nutrient media, aeration regimen and incubation time was developed. Effects of biocides and corrosion inhibitors on some parameters of biofilms and relevant processes of steel corrosion were investigated.
A set of bioassays allowing assessment of the impact that biocides and inhibitors could produce on the environment was designed.
