Analysis of Microbial Communities as Indicators of Microbially Induced Corrosion Potential in Stainless Steel Piping

Exposure of a 304 stainless steel sample to an inductively coupled low pressure radio frequency (RF) nitrogen plasma leads to the formation of a nitriding layer. The protective properties of this layer are investigated by electrochemical methods. The corrosion potential of the steel in an aqueous solution depends on the working parameters of the plasma such as the time exposure and the distance between the steel sample and the high voltage (HV) coil of the treatment reactor.

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Defect characterization in pipe-to-pipe welds in large-diameter stainless-steel piping

Materials Characterization ◽

10.1016/1044-5803(94)90078-7 ◽

1994 ◽

Vol 33 (2) ◽

pp. 155-162 ◽

Cited By ~ 1

Author(s):

D.E. Rawl ◽

S.L. West ◽

D.A. Wheeler ◽

M.R. Louthan

Keyword(s):

Stainless Steel ◽

Large Diameter ◽

Defect Characterization ◽

Steel Piping

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Effect of Seawater Biofilms on Corrosion Potential and Oxygen Reduction of Stainless Steel

CORROSION ◽

10.5006/1.3584936 ◽

1988 ◽

Vol 44 (10) ◽

pp. 717-723 ◽

Cited By ~ 107

Author(s):

S. C. Dexter ◽

G. Y. Gao

Keyword(s):

Stainless Steel ◽

Oxygen Reduction ◽

Corrosion Potential

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Inspection and mitigation for pitting corrosion on stainless steel process piping to prevent process safety event and loss production opportunity in Medco E&P

10.29118/ipa21-o-43 ◽

2021 ◽

Author(s):

I. Rosyadi

Keyword(s):

Stainless Steel ◽

Pitting Corrosion ◽

Sun Exposure ◽

Passive Layer ◽

Process Safety ◽

Pipe Surface ◽

Corrosion Propagation ◽

Process Piping ◽

Safety Event ◽

Steel Piping

Stainless steel piping has excellent corrosion resistant properties, both internal or external piping surface. In humid circumstances, sea vapor containing chlorine will be trapped on the pipe surface, especially pipes below deck with minimum sun exposure (more humid). Chlorine on the external pipe surface will damage the passive layer of stainless steel pipe. Damage speed is faster than recovery of passive layer stainless steel. This condition lead to a lot of localized pitting corrosion spread. The corrosion was detected visually and carried out with dye penetrant inspection to assure pitting condition. Actual dimension of pitting (depth, diameter) cannot be measured due to limitation of the NDE technique. This pitting corrosion can result hydrocarbon leakage as a process safety event that contributes loss of production opportunity. Without modification circumstances, this condition can be stopped immediately by application of a viscos elastic coating to prevent pitting corrosion propagation. Application of viscos elastic coating is simpler and faster when compared to conventional coating. Viscos elastic coating will protect stainless steel piping surface against oxygen and chloride in humid circumstances so that stainless steel can recover passive layer and stop pitting corrosion.

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Corrosion Behaviors of 0Cr18Ni9 Stainless Steel under the Combination Action of Sulfate-Reducing Bacteria and V.natriegens

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.356-360.161 ◽

2011 ◽

Vol 356-360 ◽

pp. 161-164

Author(s):

Cai Xiang Gu ◽

Xiao Ming Zhao ◽

Yan Sheng Yin ◽

Gui Jun Ji

Keyword(s):

Stainless Steel ◽

Corrosion Potential ◽

Sea Water ◽

Microbial Corrosion ◽

Sulfate Reducing ◽

Facultative Anaerobic ◽

Corrosion Behaviors ◽

Microbial Film ◽

Combined Action ◽

Reducing Bacteria

Advantage strains SRB and V.natriegens were obtained from the China East Sea for this study. Polarization curves, corrosion potential, scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS) analyses were adopted in order to investigate the corrosion behaviors of 0Cr18Ni9 stainless steel under the combination action of anaerobic SRB and facultative anaerobic V.natriegens, The characteristics and mechanisms of microbial corrosion action in sea water were analyzed in this paper. The results show that SRB and V.natriegens promote each other’s growth when cultivated in the mixed microbe medium, in which the rate of corrosion is higher than that in the single microbe; Under the combined action of the mixed microbe, the microbial film gets wider and thicker, and corrosion products and metabolite are produced, which furthermore accelerates the passivation and pit corrosion to the 0Cr18Ni9 stainless steel.

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