TY - JOUR
T1 - Electrochemical kinetics of sulfate reducing bacteria isolated from a gas pipeline
AU - Mora-Mendoza, J. L.
AU - Padilla-Viveros, A. A.
AU - Zavala-Olivares, G.
AU - Gonzalez-Núñez, M. A.
AU - Moreno-Serrano, J. L.
AU - Hernández-Gayosso, M. J.
AU - García-Esquivel, R.
AU - Galíndez, J.
N1 - Publisher Copyright:
© 2003 by NACE International.
PY - 2003
Y1 - 2003
N2 - A strain of sulfate reducing bacteria (SRB) was isolated from the inner deposits of a pipeline that transports sour gas in the Marine Region of Mexico. The sample was collected from the 36" Atasta NohochA pipeline. The strain was identified by 16S rRNA sequential analysis as Desulfovibrio sp. The physiological kinetics in Posgate C media showed sulfate consumption and 30 mM sulfide production up to 250 h. The corrosion rate was evaluated with API XL 52 probes by weight loss and three electrochemical techniques: Rp, EIS and electrochemical noise. When Desulfovibrio sp. was inoculated in the Posgate C media, a reduction in the corrosion rate vs. time was measured by Rp and EIS. This behavior was attributed to the formation of a FeS film and biofilm, which form an effective diffusion barrier. On the other hand, the electrochemical noise measurements indicated that a localized corrosion process took place on the surface sample, which was confirmed by SEM analysis.
AB - A strain of sulfate reducing bacteria (SRB) was isolated from the inner deposits of a pipeline that transports sour gas in the Marine Region of Mexico. The sample was collected from the 36" Atasta NohochA pipeline. The strain was identified by 16S rRNA sequential analysis as Desulfovibrio sp. The physiological kinetics in Posgate C media showed sulfate consumption and 30 mM sulfide production up to 250 h. The corrosion rate was evaluated with API XL 52 probes by weight loss and three electrochemical techniques: Rp, EIS and electrochemical noise. When Desulfovibrio sp. was inoculated in the Posgate C media, a reduction in the corrosion rate vs. time was measured by Rp and EIS. This behavior was attributed to the formation of a FeS film and biofilm, which form an effective diffusion barrier. On the other hand, the electrochemical noise measurements indicated that a localized corrosion process took place on the surface sample, which was confirmed by SEM analysis.
KW - Electrochemical techniques
KW - MIC
KW - SEM
KW - SRB
UR - http://www.scopus.com/inward/record.url?scp=33646224572&partnerID=8YFLogxK
M3 - Artículo de la conferencia
AN - SCOPUS:33646224572
SN - 0361-4409
VL - 2003-April
JO - NACE - International Corrosion Conference Series
JF - NACE - International Corrosion Conference Series
T2 - Corrosion 2003
Y2 - 16 April 2003 through 20 April 2003
ER -
