The influence of Desulfovibrio vulgaris on the efficiency of imidazoline as a corrosion inhibitor on low-carbon steel in seawater

González-Rodríguez, Carlos Alberto; Rodríguez-Gómez, Francisco Javier; Genescá-Llongueras, J.

doi:10.1016/j.electacta.2008.02.119

Cited by 33 publications

(13 citation statements)

References 16 publications

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“…Este efecto hace que el tiempo de vida de las picaduras metaestables sea mayor, produciéndose, en algunos casos, un crecimiento estable de las mismas [1] . Los depósitos biológicos pueden activar la superficie metálica por la formación de H 2 S por parte de las bacterias sulfatoreductoras [34][35][36][37] o por la formación de H 2 O 2 por otras especies [1] .…”

Section: K Ke Ey Yw Wo or Rd Ds Sunclassified

Medida de ruido electroquímico para el estudio de procesos de corrosión de aleaciones metálicas

Sánchez-Amaya¹,

Bethencourt²,

González-Rovira³

et al. 2009

Rev. metal.

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El ruido electroquímico es la técnica que estudia las fluctuaciones de las señales de potencial (E) y de corriente (I) que se generan cuando un metal se corroe en un medio corrosivo. Desde un punto de vista experimental, existen tres configuraciones básicas mediante las cuales se pueden obtener señales de E y de I. Estas configuraciones se han esquematizado en la figura 1. En esta figura, WE, WE1 y WE2 son los electrodos de trabajo, preparados a partir de muestras de la aleación que se desea estudiar. Por su parte, RE es el electrodo de referencia y CE, el contraelectrodo, también llamado electrodo auxiliar [1] .La configuración descrita en la figura 1 (A) permite obtener el ruido de potencial en muestras polarizadas galvanostáticamente. Para ello, se impone una corriente constante y se registra la respuesta en potencial del sistema. En la segunda configuración ( Fig. 1 (B)) se registra solamente el ruido de corriente, cuando la El ruido electroquímico (electrochemical noise, EN) es una técnica que permite estimar la velocidad y los mecanismos de corrosión de aleaciones metálicas mediante la medida y análisis de las fluctuaciones de corriente y potencial. Su principal ventaja frente a otras técnicas electroquímicas es que el proceso de medida no perturba externamente el sistema corrosivo, por lo que el sistema se mantiene en el potencial natural de corrosión. Las dos etapas necesarias para utilizar esta técnica son la medida y el análisis de las señales de ruido electroquímico. En este artículo, se revisan exclusivamente los conceptos más importantes de la etapa de medida, describiéndose la metodología necesaria para generar y registrar señales de ruido electroquímico. Los parámetros de análisis de señales más empleados en la bibliografía se describirán en otro artículo de revisión. En el presente trabajo se describen, en primer lugar, los dispositivos experimentales utilizados habitualmente para medir señales de EN. Posteriormente, se estudian las propiedades más importantes de las señales de EN. Finalmente, se analizan las fuentes de ruido instrumental que pueden afectar a las señales de ruido electroquímico del sistema corrosivo estudiado. P Pa al la ab br ra as s c cl la av ve eRuido electroquímico; Corrosión; Aleaciones metálicas; Velocidad de corrosión; Mecanismos de corrosión.M Me ea as su ur re em me en nt t o of f e el le ec ct tr ro oc ch he em mi ic ca al l n no oi is se e f fo or r t th he e s st tu ud dy y o of f c co or rr ro os si io on n p pr ro oc ce es ss se es s o of f m me et ta al ll li ic c a al ll lo oy ys s A Ab bs st tr ra ac ct t Electrochemical noise (EN) is a technique that allows the estimation of both the rate and the corrosion mechanism of different metallic alloys by means of the measurement and the analysis of the fluctuations of current and voltage. Its main advantage against other electrochemical techniques is that during the measurement process, the corrosive systems under study are not instrumentally disturbed, and therefore, the systems are kept at their natural corrosion po...

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Section: K Ke Ey Yw Wo or Rd Ds Sunclassified

Medida de ruido electroquímico para el estudio de procesos de corrosión de aleaciones metálicas

Sánchez-Amaya¹,

Bethencourt²,

González-Rovira³

et al. 2009

Rev. metal.

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“…Edyvean and others (1992) 70 AISI 316 stainless steel (UNS S31600) as part of modified Robbins devices (MRD) MRD were sterilized by filling them with 2.5 vol% hypochlorous acid (commercial bleach) and allowed to stand for 2 hours; then, they were rinsed with sterile deionized water. González-Rodríguez and others (2008) 22 AISI 1018 (UNS G10180) mild steel coupons Cleaned coupons were sterilized with ethanol before exposure to the experimental media Gu and others (1998) 23 AISI 316 (UNS S31600) stainless steel coupon as a part of EIS cells…”

Section: Methodsmentioning

confidence: 99%

“…19 Water solutions have been found more efficient in denaturing proteins than 200-proof ethyl alcohol, although they may lack sporicidal action and cannot penetrate protein-rich materials. 19 Following methodologies described in the literature, e.g., 6,12,[21][22][23][24] and personal communications with other MIC investigators at the University of Akron, 25 three exposure times were selected. The first two consisted in immersing abraded, clean coupons in 75 vol% ethanol solution for 15 or 18 hours, trying to replicate what in the literature is referred to as "overnight" exposure.…”

Section: Methodsmentioning

confidence: 99%

Efficacy of Sterilization Methods and Their Influence on the Electrochemical Behavior of Plain Carbon Steel

Giai

Ortiz

Kappes

et al. 2016

J. Electrochem. Soc.

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Minimizing contamination of control treatments in microbiologically influenced corrosion (MIC) studies is of critical importance. Metal sterilization procedures should not alter the surface nor affect the inherent susceptibility of the metal to corrosion while adequately deactivating biological activity. However, there is no consensus in the literature regarding such procedures due to, in part, the lack of a universally accepted methodology. This investigation evaluates various sterilization methods for carbon steel concerning practicality, efficacy, and effects on the electrochemical response of the metal. Three sterilization procedures using i) dry heat, ii) ethanol, or iii) glutaraldehyde as sterilizing agents were evaluated. Even though all sterilization approaches were equally effective in eliminating microorganisms and spores from the metal surface, dry heating at 170 • C in an inert atmosphere was identified as the most convenient sterilization method regarding practicality and consistency in the electrochemical response of the metal. Sterilization of carbon steels in 75 vol% ethanol and glutaraldehyde, as well as alcohol followed by flaming, is discouraged given the large dispersion in corrosion response caused by the exposure to the sterilization media. Microbiologically influenced corrosion (MIC) studies deal with the role microorganisms have on electrochemical processes leading to corrosion.1-3 As bacteria and fungi interact with the metal surface and its environment, they are able "to initiate, facilitate or accelerate the corrosion reaction without changing its electrochemical nature."4 The ubiquitous nature of some microorganisms can present a challenge to MIC studies, where contamination with species of diverse metabolic capabilities can alter the result of the experiments. Therefore, minimizing contamination from foreign microorganisms to maintain a microbial community that properly reflects the desired microbial composition (i.e. these being an environmental sample or a specifically defined community) is of critical importance in MIC research.Most of the components used in an MIC study (i.e. glassware, reactors or electrochemical cells, and solutions) can be sterilized following standard sterilization procedures 5 used by microbiologists; however, there is no consensus regarding sterilization procedures for metal samples in the literature. In the ideal situation, the sterilization methodology should kill all microorganisms and spores on the metal, but it should not alter its surface nor affect the inherent susceptibility of the metal on corrosion.In a literature survey of over 200 papers dealing with MIC of carbon and low alloy steels, there were over 20 different procedures to sterilize metal samples, Table I. Some of the methods described in the literature range from autoclaving steel stubs inside of watertight containers, submerging the stubs in 70 vol% ethyl alcohol and flaming them before inoculation, 6 to immersion in a 2000 ppm chlorine solution (i.e. approximately 4000 times the residual...

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“…Biocorrosion is responsible for greater than 20% pipeline system failure and biocorrosion of metals and metal alloys drew considerable attention in recent years [1,2]. Sulfate-reducing bacteria (SRB) are the most important and largest microorganism group that cause dissimilative sulfate reduction and are the largest bacteria group associated with MIC [3][4][5].…”

Section: Introductionmentioning

confidence: 99%

“…The biocidal activity of glutaraldehyde and EDDS determined on SRB and reported that 30 mg L -1 glutaraldehyde and 2000 mg L -1 EDDS controlled the growth of SRB [10]. In literature different synthetic compounds were used for corrosion inhibition [5,11,[12][13][14][15]. The oxidiazole derivatives such as 2-MPOX, 3-MPOX, 4-MPOX, were used as biocides on brass and low carbon steel that slowed down cathodic and anodic process [16,17].…”

Section: Introductionmentioning

confidence: 99%

Biocorrosion inhibition effect of 2-aminopyrimidine derivatives on SRB

Onat¹,

Yiğit²,

Nazır³

et al. 2016

Int. J. Corros. Scale Inhib.

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In the study the biocidal activity and the corrosion inhibitor activity of 2-aminopyrimidines on growth of Desulfotomaculum sp. B2-1 and B2-2 strains and biocorrosion of X65 steel in 63a medium were determined. For this purpose 4 synthetic compounds (2-amino-4-chloro-6-methylpyrimidine (AMP1), 2-amino-4-chloro-6-morpholinepyrimidine (AMP3), 2amino-4-chloro-6-(4-methylpiperazine-1-yl) pyrimidine (AMP8), 2-amino-4-morpholine-6-methylpyrimidine (AMP11)) were tested for biocidal activity on Desulfotomaculum sp. Corrosion experiment system were prepared with standard corrosion cell were incubated at 30°C in incubator for bacterial growth. Electrochemical Impedance Spectroscopy (EIS) and potentiodynamic polarization methods were used to identify corrosion with CH Instruments 660B. The AMP1 and AMP3 compounds reduced the growth of Desulfotomaculum sp. at 25 mg L -1 concentration. Moreover, these synthetic compounds reduced the biocorrosion of X65 steel by B2-1 strain 95% and 91% for AMP1 and AMP3 sequentially.

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The influence of Desulfovibrio vulgaris on the efficiency of imidazoline as a corrosion inhibitor on low-carbon steel in seawater

Cited by 33 publications

References 16 publications

Medida de ruido electroquímico para el estudio de procesos de corrosión de aleaciones metálicas

Medida de ruido electroquímico para el estudio de procesos de corrosión de aleaciones metálicas

Efficacy of Sterilization Methods and Their Influence on the Electrochemical Behavior of Plain Carbon Steel

Biocorrosion inhibition effect of 2-aminopyrimidine derivatives on SRB

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