Variations of Microenvironments with and without SRB for Steel Q 235 under a Simulated Disbonded Coating

Xu, Jin; Sun, Cheng; Mao, Yan; Wang, Fuhui

doi:10.1021/ie303335n

Cited by 17 publications

(5 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The corrosion test was carried out for a total of 14d. Aqueous solutions were taken for 0d, 2d, 5d, 10d, and 14d respectively to measure sulfate content by the UV spectrophotometric method (Xu et al, 2013).…”

Section: Sulfate Ion Concentration Changesmentioning

confidence: 99%

See 1 more Smart Citation

Corrosion of Q235 carbon steel induced by sulfate-reducing bacteria in groundwater: corrosion behavior, corrosion product and microbial community structure

Hua,

Sun,

Wang

et al. 2023

Preprint

View full text Add to dashboard Cite

Microbiologically influenced corrosion (MIC) is one of the reasons leading to the service failure of pipelines buried in the soil. To investigate the effect of sulfate-reducing bacteria (SRB) on the corrosion behavior of Q235 carbon steel in groundwater, a hanging plate test was carried out and the SRB was characterized by electrochemical methods, surface analysis, and biological analysis. In addition, a group of blank experiments was used as a control. The results showed that SRB continued to grow and reproduce in groundwater without lacking a carbon source for 14d to maintain life activities. The community structure has changed after corrosion, and the dominant species of SRB has changed from Desulfovibrio to Desulfosporosinus. During the whole growth cycle, the electrochemical results demonstrated that the impedance of the carbon steel surface forming a biofilm was 1 order of magnitude higher than that of other periods, and the formed ferrous sulfide layer also hindered the occurrence of corrosion. In comparison to the condition without SRB, the inclusion of SRB results in reduced weight loss. The average weight loss with SRB is 0.01389 g, whereas the average weight loss without SRB is 0.03956 g. However, the 3D topography indicated that the surface of carbon steel was more uneven and pits were increased with SRB. Altogether these results implied that the growth of SRB makes the corrosion process of Q235 carbon steel more complicated.

show abstract

Section: Sulfate Ion Concentration Changesmentioning

confidence: 99%

“…SRB can reduce sulfate to sul de during the growth process, and the change in sulfate content can be calculated to re ect the change in sulfur content in groundwater during the corrosion process (Xu et al, 2013). It was observed that the content of sulfate decreased by about 200 mg/L within 14d in Fig.…”

Section: Sulfate Content Measurementmentioning

confidence: 99%

Corrosion of Q235 carbon steel induced by sulfate-reducing bacteria in groundwater: corrosion behavior, corrosion product and microbial community structure

Hua,

Sun,

Wang

et al. 2023

Preprint

View full text Add to dashboard Cite

show abstract

“…A lot of research was performed to study the corrosion process under disbonded coating (Ma et al , 2020; Xu et al , 2011; Xu et al , 2013). Mathematical models were proposed by Wang et al (2014, 2016) to predict the evolution of chemical properties of corrosive media in a crevice.…”

Section: Introductionmentioning

confidence: 99%

Microenvironment evolution and SCC behavior of subsea pipeline within disbonded coating crevice in a seawater environment under cathodic protection

Zhang

Liu

et al. 2021

ACMM

View full text Add to dashboard Cite

Purpose This paper aims to make clear the sensitive zone of subsea pipeline to stress corrosion cracking (SCC) under a disbonded coating. Design/methodology/approach The change of microenvironment under a disbonded coating in artificial seawater was analyzed by using a rectangular crevice cell. The SCC behavior of subsea pipeline was studied by slow strain rate tensile tests. Findings The microenvironment at the crevice bottom exhibits obvious acidification, Cl- aggregation and cathodic protection potential (CP) rise. Accordingly, the susceptibility of X70 steels to SCC is high due to the intensive anodic dissolution effect. At the opening, hydrogen atom can access into the steel and induce hydrogen embrittlement effect on account of the applied over-protected CP potential, resulting in a relatively high susceptibility to SCC. The corrosiveness of the microenvironment at crevice middle, however, is mild with proper CP potential; thus, the susceptibility of X70 steel to SCC here is lower than that obtained at the opening and the crevice bottom. Originality/value A rectangular crevice cell is built to survey the microenvironment evolution under a disbonded coating in situ. The sensitive zone of subsea pipeline to SCC under a disbonded coating is clarified.

show abstract

“…Microbiologically influenced corrosion of metals is widely found in different environments [16,17,18,19,20], however, the effects of AC current on microbiologically influenced corrosion are seldom studied. Sulfate-reducing bacteria (SRB) are the most important microbes for the corrosion of buried pipelines, and SRB influenced corrosion has been widely found in soils, mines, seaports, lakes, power plants, sewage treatment facilities, offshore structures, and so on [21,22].…”

Section: Introductionmentioning

confidence: 99%

Effect of Alternating Current and Sulfate-Reducing Bacteria on Corrosion of X80 Pipeline Steel in Soil-Extract Solution

Qing

Bai

et al. 2019

Materials

Self Cite

View full text Add to dashboard Cite

AC corrosion has been considere d as a threat to the corrosion of buried pipelines. Effects of sulfate-reducing bacteria (SRB) and alternating current (AC) on corrosion of X80 pipeline steel in soil-extract solution were investigated by electrochemical and surface analysis techniques. AC current can inhibit the growth of planktonic and sessile SRB. The corrosion current density of steel with 10 mA/cm2 AC current is about nine times bigger than that without AC current. Corrosion morphology changes from small pitting to large pitting holes with increasing AC current density. Corrosion of steel with SRB and AC current is controlled by both active dissolution of iron and film degradation.

show abstract

Variations of Microenvironments with and without SRB for Steel Q 235 under a Simulated Disbonded Coating

Cited by 17 publications

References 24 publications

Corrosion of Q235 carbon steel induced by sulfate-reducing bacteria in groundwater: corrosion behavior, corrosion product and microbial community structure

Corrosion of Q235 carbon steel induced by sulfate-reducing bacteria in groundwater: corrosion behavior, corrosion product and microbial community structure

Microenvironment evolution and SCC behavior of subsea pipeline within disbonded coating crevice in a seawater environment under cathodic protection

Effect of Alternating Current and Sulfate-Reducing Bacteria on Corrosion of X80 Pipeline Steel in Soil-Extract Solution

Contact Info

Product

Resources

About