Influence of<i>Actinomyces israelii</i>biofilm on the corrosion behaviour of copper IUD

Valdez, S.; Carrillo, B.M.; Zlatev, Roumen; Stoytcheva, Margarita; Schorr, M.; Cobo, R; Perez, Lilyanna; Bastidas, J. M.

doi:10.1108/00035590810859412

Cited by 7 publications

(1 citation statement)

References 11 publications

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“…The biofilm formation requires that the microorganism grows in an homogeneous population and the need of the biochemical processes to accumulate exopolysaccharide has been established (Ferná ndez- Delgadillo et al, 2003). Biofilms modify the interaction between the metal surface and the environment, in particular protecting the surface from biocorrosion as is shown by Pseudomonas fragi, Escherichia coli and Bacillus brevis (Jayaraman et al, 1998(Jayaraman et al, , 1999 or by Actinomyces (Valdez et al, 2008). Changes at the interface due to the colonization of the microorganisms produce oxygen concentrations cells, and in consequence the surface under the colonies is anodic, whereas the non-affected areas are cathodic (Fernández-Delgadillo et al, 2003).…”

Section: Introductionmentioning

confidence: 99%

Corrosion inhibition in copper by isolated bacteria

García

Rivera

Campos-Guillén

et al. 2012

Anti-Corrosion Methods and Materials

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Purpose -The purpose of this paper is to report a study of microbiological influenced corrosion (MIC) of copper due to bacteria strains isolated from potable water pipes and oxidation lagoons using electrochemical noise (EN) analysis and scanning electron microscopy (SEM). Design/methodology/approach -Bacteria strains isolated from copper surfaces of potable water pipes and from oxidation lagoons were identified, based on the 16S rDNA gene sequence analysis. Corrosion studies were undertaken over a period of six weeks, placing copper electrodes inside an LB culture media with and without bacteria. The corrosion resistance was obtained using EN analysis. In all the cases, the corrosion type was identified. SEM images of the copper electrodes were taken to evaluate the surface condition. Findings -The bacteria strains identified were: Pantoea agglomerans, Alcaligenes faecalis, Bacillus cereus, Brucellaceae bacterium, Enterobacter cloacae, Delftia tsuruhatensis, and Pseudochrobactrum asaccharolyticum. EN analysis gave noise resistance values in the range 1,036-5,040 Vcm 2 for the control samples and in the range of 2,336-22,573 Vcm 2 for samples that had been inoculated with bacteria. It was found that a decrease in the rate of corrosion took place due to the development of a biofilm by the microorganisms on the copper surface. SEM images corroborated the presence of the biofilm on the copper electrodes. Practical implications -The isolated bacteria strain reduced the rate of corrosion on the copper electrodes, as shown by the SEM images and EN analysis results, due to the formation of a biofilm that can act as an anticorrosive coating. Originality/value -Even though MIC is a known phenomenon, it has not been reported that isolated bacteria strains can reduce corrosion on the surface of copper potable water pipes and in oxidation lagoons.

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Section: Introductionmentioning

confidence: 99%

Corrosion inhibition in copper by isolated bacteria

García

Rivera

Campos-Guillén

et al. 2012

Anti-Corrosion Methods and Materials

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Corrosion measurements in industrial environments

Lahrache¹,

Bouiti²,

Labjar³

et al. 2023

Electrochemical and Analytical Techniques for Sustainable Corrosion Monitoring

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Copper deterioration: causes, diagnosis and risk minimisation

Bastidas¹,

Criado²,

Fajardo³

et al. 2010

International Materials Reviews

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Copper is widely used in many applications such as heat exchangers, condensers, heating and air conditioning systems, electricity, electronic circuitry and ornamental parts. This paper reviews the issue of copper corrosion in different environments and applications. Special attention is paid to the influence of relative humidity and low molecular weight carboxylic acids. These acids are present in rain, snow, clouds and particulate matter and contribute about 15-35% of rain acidity. Attention is also paid to copper corrosion originated by formic, acetic, propionic and butyric acid vapours. Corrosion product layers (patina) are analysed, showing the relationship between potential and current density cathodic peaks, and models are proposed that show a proportionality factor of the dimensions of a resistor. These results are of practical importance in copper roofing applications. Before 1985, copper was almost universally considered to be a corrosion resistant conduit of potable water, and few instances of copper tube failure were reported. Where unacceptable performance was identified, the problem was usually attributed to reticulation and plumbing systems. In air conditioning applications, premature failure of copper tubing frequently occurs due to pitting corrosion after a short time in service or even during postinstallation leakage tests. This type of corrosion is described in the literature as formicary corrosion, and its morphology is characterised by microscopic caverns connected by tunnels. Specimens are analysed to assess the reasons for such premature corrosion failure. Finally, procedures to mitigate copper corrosion are addressed. Pickling in dilute mineral acids (H 2 SO 4 and HCl) is discussed as the most common method for removing oxides formed on the surface of copper based materials during mill processing and manufacturing operations. The use of corrosion inhibitors, such as immersion corrosion inhibitors and volatile corrosion inhibitors (VCI), is a widespread practice to reduce copper corrosion, achieving significant delays in the corrosion process. Reference is made to the search for new environmentally friendly inhibitors for copper and bronze using organic compounds in acid, neutral and alkaline media, and a number of ecological alternatives are reviewed.

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Influence ofActinomyces israeliibiofilm on the corrosion behaviour of copper IUD

Cited by 7 publications

References 11 publications

Corrosion inhibition in copper by isolated bacteria

Corrosion inhibition in copper by isolated bacteria

Corrosion measurements in industrial environments

Copper deterioration: causes, diagnosis and risk minimisation

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