Corrosion and structural deterioration due to microbiologically influenced sulfate reduction and hydrogen sulfide gas oxidation to sulfuric acid are responsible for much of the expense related to santiatry sewage collection systems. This paper explains the mechanism of this biologically induced corrosion, its consequence, and methods to mediate it.
Electrochemical behavior of API X-80 steel materials in 3.5% wt. of NaCl solution containing different concentrations of H2S at different temperatures was studied. Potendiodynamic polarization, electrochemical impedance spectroscopy (EIS) and scanning electron microscopy (SEM) were used to characterize the corroded API X-80 steel surface.
We have identified a class of inhibitory molecules that abrogate sulfidogenesis in oilfield produced fluids. Bottle tests and laboratory-scale bioreactors to mimic field conditions, found that very low doses of two versions of this class of compounds were found to effectively prevent H2S generation.
An investigation into the effect of ppm concentrations of acetic acid on the electrochemical corrosion behavior of API 5L X65 carbon steel in a sour environment. Electrochemical techniques, Linear Polarization Resistance (LPR), Potentiodynamic Polarization and Electrochemical Impedance Spectroscopy (EIS), were used.