Possibility of micromycetes detected in dust to grow on metals (Al, Fe, Cu, Zn) and on polyaniline-modified Ni

Lugauskas, Albinas; Leinartas, Konstantinas; Grigucevičienė, Asta; Selskienė, Aušra; Binkauskienė, Elena

doi:10.2478/v10055-008-0023-z

Cited by 7 publications

(4 citation statements)

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“…To further support this results, Stokes and Lindsay (1979) stated that the electrical characteristics of steel and aluminium can be worsened by growth and attachment of some species of fungi belonging to the genera Aspergillius and Penicillium. Lugauskas et al (2008) reported the contamination of aluminium metals by Acremonium spp. According to them, this fungus produces fusidic acid and its sodium salt fusidin which affected the metal surfaces.…”

Section: Discussionmentioning

confidence: 99%

“…Differential aeration caused by the adherence of fungal mats can cause crevice corrosion. The reaction of aluminum and its alloys used in aircraft building to the influence of fungi and their metabolites has been studied (Lugauskas et al, 2008). Changes in the composition of surface layer of metal or metal alloy are one of the evidences confirming that fungi have penetrated the metal surface and use it to satisfy their nutritional needs.…”

Section: Introductionmentioning

confidence: 99%

“…Changes in the composition of surface layer of metal or metal alloy are one of the evidences confirming that fungi have penetrated the metal surface and use it to satisfy their nutritional needs. For example, Lugauskas et al (2008) noted that the formation of Aspergillus niger colonies and their colour are determined by oxygen concentration in metal oxide layer. They further observed that the pH of the surface of copper alloys decreases with an increase in oxygen quantity which is mostly pronounced in the zone where fungi is growing.…”

Section: Introductionmentioning

confidence: 99%

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2019

Int. J. Appl. Microbiol. Biotechnol. Res.

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Studies on fungal influenced corrosion (FIC) of aluminium (Al) in the presence of Acremonium kiliense were carried out using gravimetric and potentiodynamic polarization (PDP) techniques. The influence depends on the capacity of fungi to grow on the metal surface and produce metabolites that stimulate changes in polarization resistance and destruct the metal surface. The results obtained after 60 days exposure show that the growth and attachment of the fungi on aluminum influenced their corrosion rate (CR) over the period as evident from the increase in CRs and weight loss. For example, the cumulative corrosion rate ∑CR of aluminium when exposed to A. kiliense was higher (5.58±0.55 mpy) than that observed when it was not exposed to fungi (2.71±0.01 mpy). The gravimetric analyses of CR and weight loss also show that they were proportional to the time of exposure. The results obtained further reveal that corrosion current density (I corr ) of the aluminium increased in the presence of the fungi (183.7 μA/cm 2 ) when compared with the value obtained in the absence of the fungi (153.5 μA/cm 2 ) which indicates an evidence of corrosion activities.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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2019

Int. J. Appl. Microbiol. Biotechnol. Res.

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“…Microbially influenced corrosion (MIC) refers to the influence of microorganisms on the kinetics of corrosion processes of metals caused by microorganisms adhering to the interfaces usually called "biofilms" [17][18][19][20][21]. The kinetics of corrosion are determined by the physico-chemical environment at the interface, e.g.…”

Section: Introductionmentioning

confidence: 99%

The Influence of Microscopic Fungi on Chromated Galvanized Zinc Coatings

Lugauskas¹,

Prosyčevas²,

Selskienė³

et al. 2010

ENG

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A solution containing Cr(VI), Cr(NO3)3 and its complex with an organic acid as well as several commercial solutions containing Cr(III) complexes with an organic acid and additionally CO2+, F-, SO42- ions were used for the studies. Results of the studies obtained in the following commercial solutions: Likonda 2AT, Cr(NO3)3 + malonic acid; Likonda 3Cr5 and Likonda 3CrMC are discussed. Steel coated with chromated Zn coatings was contaminated by some microscopic fungi. The variety of fungi on chromated plates diminished, however the propagules of fungi did not disappear completely. The Likonda 3Cr5 solution diminishes fungi contamination on chromated steel most effectively. In water used to rinse the surface of chromated plates the number of fungi propagules was detected to be higher as compared to that on the plate surface. The least quantity of fungi propagules was detected in water used to rinse plates coated in the Likonda 3Cr5 solution. The main part of fungi detected on chromated plates treated in the Likonda 3Cr5 solution were the fungi of Cladosporium species (C.herbarum, C.cladosporioides). The latter species also dominated on chromated plates coated with zinc and treated with the other solution. It should be mentioned, that on these plates chromated in this solution, Actinomycetes of the Streptomyces group were abundant. After comparison of surfaces of the plates treated in four solutions it has been determined that the surface of the plates treated in the Likonda 3Cr5 passivation solution and exposed to modelling conditions changed least of all. It has been noticed that on the subject studied white porous rust accumulates, the intensity of this process on the surface studied determines both the probability of corrosion and the resistance of the used safety means to the external factors

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