An impedance study on admiralty brass dezincification originated by microbiologically influenced corrosion

Ibars, J. R.; Polo, J. L.; Moreno, Diego A.; Ranninger, C.; Bastidas, J. M.

doi:10.1002/bit.20197

Cited by 15 publications

(9 citation statements)

References 9 publications

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“…A change in color was observed in the aerobic glass reactor on the 144 h of experimentation, when it became black. This was due to the formation of a large amount of iron sulfide that may be attributed to the effect of SRB's high metabolic activity . As in the sterile medium, parameters τ 1 , R 1 , Y 1 , and α 1 in the high frequency domain may be related to the formation of a dielectric film, and τ 2 , R 2 , Y 2 , and α 2 in the low frequency domain with the interaction between AISI SAE 1020 CS and the medium.…”

Section: Resultsmentioning

confidence: 98%

Monitoring steel microbiologically induced corrosion using a new electrochemical cell

Miranda

Fajardo²,

Jaimes

et al. 2014

Materials & Corrosion

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A new test electrochemical cell is described for monitoring the steel microbiologically induced corrosion and numerical simulations were performed using finite element method to demonstrate the suitability of the device. Carbon steel concentric ring‐monitoring electrochemical cells were exposed to sterile and inoculated media for acid‐producing bacteria and sulfate‐reducing bacteria consortia. A relationship between impedance data and microbial growth was proposed by statistical analysis based on the receiver operating characteristic curve analysis.

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Section: Resultsmentioning

confidence: 98%

Monitoring steel microbiologically induced corrosion using a new electrochemical cell

Miranda

Fajardo²,

Jaimes

et al. 2014

Materials & Corrosion

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“…These metals are often used in cooling systems, in heat exchangers (chemical and nuclear power industry). The copper ions can control the microbial growth but corrosion relevant microorganisms can attack the metal and biofilm can grow on its surface [63].…”

Section: Copper and Copper Alloysmentioning

confidence: 99%

Review on the microbiologically influenced corrosion and the function of biofilms

Telegdi¹,

Shaban²,

Trif³

2020

Int. J. Corros. Scale Inhib.

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The microbiologically/microbially influenced corrosion (MIC) is a special type of corrosion; in this case the microorganisms by their presence and aggressive metabolites alter the processes on solid surfaces via electrochemical and chemical reactions. When microorganisms are present in most cases the degradation of metals or alloys happens by microbes embedded in biofilms and by their excreted metabolites (e.g. acids), macromolecules (with complexing ability) and by other molecules that can form insoluble precipitates; all these reactions increase the deterioration. The paper summarizes the most important characteristics of the MIC, mainly the so-called biocorrosion of metals and alloys. Not only the chemical and electrochemical processes, but the roles of the corrosion relevant microorganisms in the deteriorating processes, as well as the information about the mechanisms of the MIC worked out in the past and in the very last period are discussed. The most important (aerobic, anaerobic, slime former, acid producer etc.) microorganisms, their nutrient requirements and the formation and role of biofilms are presented, characterized and discussed, as well as the influence of biofilms on the MIC is also demonstrated. The impact of metals on the MIC is also discussed. The history of the research on MIC from its discovery till the 21 th century will demonstrate the enormous work that allowed the understanding of this special type of corrosion as well as its mechanism and the role of the biofilm in MIC. The paper will expose the reactions that go on between the slimy layer (that surrounds the microorganisms even in planktonic form) and the metal surface. The mostly used techniques to visualize what on the surface happens and to measure the change in the current density/corrosion potential and in the corrosion rate due to microbial action are also summarized and in all cases the advantages and disadvantages of all methods are discussed.

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“…104 Figure 7 shows the corrosion rate for Admiralty brass as a function of immersion time in fresh water. 105 The corrosion rate is y0?002 mm per year up to 122 days of immersion. It is probable that the calcite (CaCO 3 ) and/ or quart (SiO 2 ) compounds which are formed influence the gravimetric results.…”

Section: Biofouling and Dezincificationmentioning

confidence: 99%

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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An impedance study on admiralty brass dezincification originated by microbiologically influenced corrosion

Cited by 15 publications

References 9 publications

Monitoring steel microbiologically induced corrosion using a new electrochemical cell

Monitoring steel microbiologically induced corrosion using a new electrochemical cell

Review on the microbiologically influenced corrosion and the function of biofilms

Copper deterioration: causes, diagnosis and risk minimisation

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