Abstract: The effects of sulfate reducing bacterial (SRB) on corrosion of zinc in different humidity soils were studied by using bacterial analyses, electrochemical impedance spectroscopy(EIS). The results show that the growth and metabolism of SRB increase with the increasing of humidity of soil. The corrosion rate and corrosion pitting depth of zinc in different humidity soils with SRB are larger than those in soils without SRB. The corrosion rate of zinc increases with the increasing of soil humidity and reaches the peak in 10%~15% water content soils, then decreases with the increasing of soil humidity. The EIS spectra exhibits single-layer model in soils with SRB and without SRB. The impedance of zinc in soils with SRB is smaller than those in soils without SRB. The results indicates that the corrosion rate of zinc increases in soils with SRB.
Effects of SRB on corrosion of zinc in different humidity soils
Abstract:
The effects of sulfate reducing bacterial (SRB) on corrosion of zinc in different humidity soils were studied by using bacterial analyses, electrochemical impedance spectroscopy (EIS) . The results show that the growth and metabolism of SRB increase with the increasing of humidity of soil. The corrosion rate and corrosion pitting depth of zinc in different humidity soils with SRB are larger than those in soils without SRB. The corrosion rate of zinc increases with the increasing of soil humidity and reaches the peak in 10%~15% water content soils, then decreases with the increasing of soil humidity. The EIS spectra exhibits single-layer model in soils with SRB and without SRB. The impedance of zinc in soils with SRB is smaller than those in soils without SRB. The results indicates that the corrosion rate of zinc increases in soils with SRB.