scholarly journals Corrosion Behavior of the Ti–6Al–4V Alloy in Sulfate-Reducing Bacteria Solution

Coatings ◽  
2019 ◽  
Vol 10 (1) ◽  
pp. 24
Author(s):  
Xingwei Zheng ◽  
Xin Zhuang ◽  
Yanhua Lei ◽  
Zhenhua Chu ◽  
Jingxiang Xu ◽  
...  
Keyword(s):  
Corrosion Behavior ◽  
Pitting Corrosion ◽  
Photoelectron Spectroscopy ◽  
Sulfate Reducing Bacteria ◽  
Underlying Mechanism ◽  
Corrosion Mechanism ◽  
X Ray ◽  
Sulfate Reducing ◽  
Subsequent Period ◽  
Reducing Bacteria

The corrosion behavior of the Ti–6Al–4V alloy was investigated in a sulfate-reducing bacteria (SRB) solution. The results showed that sulfate-reducing bacteria has good affinity with the surface of the Ti–6Al–4V alloy after 5 days. A potentiodynamic polarization test demonstrated that the corrosion resistance of the Ti–6Al–4V alloy was initially improved but deteriorated quickly in the subsequent period. The corrosion mechanism of the Ti–6Al–4V alloy was revealed by analyzing its microstructure with the aid of scanning electron microscopy, X-ray photoelectron spectroscopy and X-ray fluorescence. The pitting corrosion was deemed to be a typical cause of the corrosion behavior of the alloy in the SRB solution. The underlying mechanism of the pitting corrosion was proposed for the alloy.

scholarly journals Study on corrosion behavior of X80 steel under stripping coating by sulfate reducing bacteria

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Yan-Yu Cui ◽  
Yong-Xiang Qin ◽  
Qing-Miao Ding ◽  
Yu-Ning Gao
Keyword(s):  
Corrosion Behavior ◽  
Electrochemical Impedance ◽  
Sulfate Reducing Bacteria ◽  
Fluorescent Labeling ◽  
Corrosion Products ◽  
Economic Losses ◽  
Corrosion Mechanism ◽  
Sulfate Reducing ◽  
X80 Steel ◽  
Reducing Bacteria

Abstract Background At present, microorganism has been considered as important factors that threaten to buried pipelines with disbonded coatings. Aiming at the problem of unknown corrosion mechanism of sulfate-reducing bacteria (SRB), a series of studies have been carried out in this paper. Spectrophotometer and fluorescent labeling technology are used to study the growth and attachment of SRB in the simulated soil solution. The corrosion behavior of X80 pipeline steel with or without SRB was researched by electrochemical methods such as open circuit potential, dynamic potential polarization curve, and electrochemical impedance spectroscopy. The microscopic morphology of the corrosion products on the surface was observed with a scanning electron microscope (SEM), and the element content of the corrosion products on the surface of the sample after corrosion was observed using X-ray energy spectrum (EDS) analysis. Results The results showed that the growth and reproduction of SRB caused the pH of the soil simulated solution to increase, which may promote the corrosion of X80 steel. In addition, the cathode reaction of X80 steel in a sterile environment is the reduction of H+, and the main corrosion product is iron oxide. When the soil simulation solution contains SRB, the cathodic reaction is controlled by both H+ reduction and sulfide depolarization reactions, and FeS appears in the corrosion products. Conclusion Although the life cycle of SRB is only about 14 days, the corrosion of X80 steel is greatly promoted by SRB, and even causes corrosion perforation, which will bring huge economic losses and serious safety hazards.

Studies on Corrosion Behavior of Q235 Steel by Iron Bacteria, Sulfate-Reducing Bacteria and Total General Bacteria in Sedimentary Water of Storage Tank

2011 ◽  
Vol 337 ◽  
pp. 281-284
Author(s):  
Dong Sheng Chen ◽  
Yong Zhang Zhou ◽  
Min Liu ◽  
Kai Wei Guo ◽  
Wu Ji Wei
Keyword(s):  
Corrosion Behavior ◽  
Storage Tank ◽  
Corrosion Current ◽  
Sulfate Reducing Bacteria ◽  
Steel Electrode ◽  
Q235 Steel ◽  
Iron Bacteria ◽  
Sulfate Reducing ◽  
Microbial System ◽  
Reducing Bacteria

The corrosion behavior of Q235 steel by Iron Bacteria (IB), Sulfate-reducing Bacteria (SRB) and Total General Bacteria (TGB) in sedimentary water of storage tank from an aromatics plant was investigated mainly by static hanging piece method, potentiodynamic polarization curve and hysteresis loop method. The results showed that the interaction of IB, SRB and TGB accelerated the corrosion rate of Q235 steel. The corrosion current density of Q235 steel electrode in IB, SRB and TGB solution was higher than that in the sterile solution, and the corrosion potential shifted in negative direction. IB, SRB and TGB reduced the corrosion resistance of Q235 steel. The corrosion of Q235 steel in the mixture of IB, SRB and TGB was more serious than in a single microbial system. The presence of IB, SRB and TGB made the pitting occur easily.

scholarly journals Effect of Sn Addition on Microstructure and Corrosion Behavior of As-Extruded Mg–5Zn–4Al Alloy

Materials ◽  
2019 ◽  
Vol 12 (13) ◽  
pp. 2069 ◽  
Author(s):  
Jian Ding ◽  
Xin Liu ◽  
Yujiang Wang ◽  
Wei Huang ◽  
Bo Wang ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Corrosion Behavior ◽  
Photoelectron Spectroscopy ◽  
Corrosion Current ◽  
Electrochemical Measurements ◽  
Corrosion Mechanism ◽  
X Ray Diffraction ◽  
X Ray ◽  
Transmission Electron ◽  
Average Grain Size

The effect of Sn addition on the microstructure and corrosion behavior of extruded Mg–5Zn–4Al–xSn (0, 0.5, 1, 2, and 3 wt %) alloys was investigated by optical microscopy (OM), field emission scanning electron microscopy (FE-SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), electrochemical measurements, and immersion tests. Microstructural results showed that the average grain size decreased to some degree and the amount of precipitates increased with the increasing amount of Sn. The extruded Mg–5Zn–4Al–xSn alloy mainly consisted of α-Mg, Mg32(Al,Zn)49, and Mg2Sn phases as the content of Sn was above 1 wt %. Electrochemical measurements indicated that the extruded Mg–5Zn–4Al–1Sn (ZAT541) alloy presented the best corrosion performances, with corrosion potential (Ecorr) and corrosion current density (Icorr) values of −1.3309 V and 6.707 × 10−6 A·cm−2, respectively. Furthermore, the corrosion mechanism of Sn is discussed in detail.

scholarly journals Trace Metal Imaging of Sulfate-Reducing Bacteria and Methanogenic Archaea at Single-Cell Resolution by Synchrotron X-Ray Fluorescence Imaging

2017 ◽  
Vol 35 (1) ◽  
pp. 81-89 ◽  
Author(s):  
Jennifer B. Glass ◽  
Si Chen ◽  
Katherine S. Dawson ◽  
Damian R. Horton ◽  
Stefan Vogt ◽  
...  
Keyword(s):  
Trace Metal ◽  
Single Cell ◽  
Fluorescence Imaging ◽  
Methanogenic Archaea ◽  
Sulfate Reducing Bacteria ◽  
X Ray ◽  
Sulfate Reducing ◽  
Reducing Bacteria

Influence of Sulfate Reducing Bacteria on Corrosion of Steel Q235 during Natural Evaporation in Soils

2012 ◽  
Vol 610-613 ◽  
pp. 243-248
Author(s):  
Xin Wang ◽  
Jin Xu ◽  
Cheng Sun
Keyword(s):  
Electrochemical Impedance Spectroscopy ◽  
Electron Probe ◽  
Electrochemical Impedance ◽  
Sulfate Reducing Bacteria ◽  
Microbiological Analysis ◽  
X Ray ◽  
Sulfate Reducing ◽  
Corrosion Rates ◽  
Corrosion Of Steel ◽  
Reducing Bacteria

Corrosion behavior of steel Q235 was investigated during natural evaporation in soils with and without sulfate reducing bacteria (SRB) by microbiological analysis, electrochemical impedance spectroscopy (EIS), energy dispersive X-ray analysis (EDXA) and electron-probe X-ray microanalysis (EPMA). The results show that during natural evaporation, oxygen content increases, amounts of SRB decrease, and the corrosion rates of steel Q235 increase with decreasing humidity of soils with and without SRB. Increments of the corrosion rates are much bigger in soils with SRB than those without SRB.

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