Effect of Sulfate Reduced Bacterium on Corrosion Behavior of 10CrMoAl Steel
WANG Hua1,LIANG Cheng��hao1,2
1. School of Chemical Engineering, Dalian University of Technology, Dalian 116012, Liaoning, China;2. Electromechanics and Materials Engineering College, Dalian Maritime University, Dalian 116026, Liaoning, China
Effect of Sulfate Reduced Bacterium on Corrosion Behavior of 10CrMoAl Steel
WANG Hua1,LIANG Cheng��hao1,2
1. School of Chemical Engineering, Dalian University of Technology, Dalian 116012, Liaoning, China;2. Electromechanics and Materials Engineering College, Dalian Maritime University, Dalian 116026, Liaoning, China
ժҪ The effects of sulfate reduced bacterium (SRB) on the corrosion behavior of 10CrMoAl steel in seawater were studied by chemical immersion, potentiodynamic polarization, electrochemical impedance spectroscopy measurement, and scanning electron microscope techniques. The results show that the content of element sulfur in the corrosion product of 10CrMoAl steel in seawater with SRB is up to 9��23%, which is higher than that of the same in sterile seawater. X��ray diffraction demonstrates that the main corrosion product is FeS. SRB increases the corrosion rate by anodic depolarization of the metabolized sulfide product. SEM observation indicates that the corrosion product is not distributed continuously; in addition, bacilliform sulfate��reduced bacterium accumulates on the local surface of 10CrMoAl steel. Hence, SRB enhances sensitivity to the localized corrosion of 10CrMoAl steel in seawater.
Abstract��The effects of sulfate reduced bacterium (SRB) on the corrosion behavior of 10CrMoAl steel in seawater were studied by chemical immersion, potentiodynamic polarization, electrochemical impedance spectroscopy measurement, and scanning electron microscope techniques. The results show that the content of element sulfur in the corrosion product of 10CrMoAl steel in seawater with SRB is up to 9��23%, which is higher than that of the same in sterile seawater. X��ray diffraction demonstrates that the main corrosion product is FeS. SRB increases the corrosion rate by anodic depolarization of the metabolized sulfide product. SEM observation indicates that the corrosion product is not distributed continuously; in addition, bacilliform sulfate��reduced bacterium accumulates on the local surface of 10CrMoAl steel. Hence, SRB enhances sensitivity to the localized corrosion of 10CrMoAl steel in seawater.
WANG Hua;LIANG Cheng��hao;. Effect of Sulfate Reduced Bacterium on Corrosion Behavior of 10CrMoAl Steel[J]. �й������ڿ���, 2007, 14(1): 74-0.
WANG Hua;LIANG Cheng��hao;. Effect of Sulfate Reduced Bacterium on Corrosion Behavior of 10CrMoAl Steel. Chinese Journal of Iron and Steel, 2007, 14(1): 74-0.
2007, Vol. 14 
