Hydrogen permeation of X80 steel with superficial stress in the presence of sulfate-reducing bacteria

2015 ◽  
Vol 91 ◽  
pp. 86-94 ◽  
Author(s):  
Tangqing Wu ◽  
Maocheng Yan ◽  
Dechun Zeng ◽  
Jin Xu ◽  
Cheng Sun ◽  
...  
Keyword(s):  
Hydrogen Permeation ◽  
Sulfate Reducing Bacteria ◽  
Sulfate Reducing ◽  
X80 Steel ◽  
Reducing Bacteria

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.

A Study of Microbiologically Induced Corrosion by Sulfate-Reducing Bacteria on Carbon Steel Using Hydrogen Permeation

CORROSION ◽  
2005 ◽  
Vol 61 (1) ◽  
pp. 68-75 ◽  
Author(s):  
M. de Romero ◽  
Z. Duque ◽  
L. Rodríguez ◽  
O. de Rincón ◽  
O. Pérez ◽  
...  
Keyword(s):  
Carbon Steel ◽  
Hydrogen Permeation ◽  
Sulfate Reducing Bacteria ◽  
Sulfate Reducing ◽  
Reducing Bacteria ◽  
Microbiologically Induced Corrosion

scholarly journals Study on Corrosion Behavior of X80 Steel under Stripping Coating by Sulfate Reducing Bacteria

2020 ◽  
Author(s):  
Yanyu Cui ◽  
Yongxiang Qin ◽  
Qingmiao Ding ◽  
Yuning Gao
Keyword(s):  
Electrochemical Impedance ◽  
Pipeline Steel ◽  
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 electrochemical 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 of the sample 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 promoted 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 Fe oxides. 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.

Corrosion by Sulfate Reducing Bacteria in Welded Joints of Stell API 5L X80

2016 ◽  
Vol 869 ◽  
pp. 699-704
Author(s):  
E.S.L. Vasconcelos ◽  
Edkarlla Sousa Dantas de Oliveira ◽  
M.A.G.A. Lima ◽  
M. Montoya ◽  
Cezar Henrique Gonzalez ◽  
...  
Keyword(s):  
Weight Loss ◽  
Hydrogen Sulfide ◽  
Corrosion Test ◽  
Welded Joint ◽  
Sulfate Reducing Bacteria ◽  
Sulfate Ion ◽  
Sulfate Reducing ◽  
X80 Steel ◽  
Micro Organisms ◽  
Reducing Bacteria

Articles report that the sulphate reducing bacteria (SRB) are the main micro-organisms related to cases of corrosion. They reduce the sulfate ion resulting in the production of sulfide, disulfide and hydrogen sulfide, potential agents of corrosion of ferrous materials. This study investigated the action of sulfate-reducing bacteria on corrosion test specimens with welded joint of API 5L X80 steel in the presence of seawater. The samples were exposed to sea and sterilized water was then added to BRS. Microorganisms were quantified periodically calculated the corrosion rate and weight loss, and the surfaces of the samples analyzed by light microscopy.

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