Localized corrosion of aluminum alloy 6061 in the presence of Aspergillus niger

Jirón-Lazos, Uriel; Corvo, Francisco; Rosa, Samuel Chacón de la; Garcı́a-Ochoa, E.; Bastidas, David M.; Bastidas, J. M.

doi:10.1016/j.ibiod.2018.05.007

Cited by 44 publications

(12 citation statements)

References 47 publications

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“…This process was simulated with CPE 2 and R 2 parameters having negative values. Negative capacitance (Y 2 ) and resistance (R 2 ) arise from surface coverage and adsorptiondesorption processes, respectively (Bastidas et al, 2001;Jinlong et al, 2016;Jirón-Lazos et al, 2018). The highest R 1 value was obtained for the specimen M3 (32285.5 Ω cm 2 ) (see Table 2), showing allows the precipitation mechanism of dichromate acting as a corrosion inhibitor on the porous Al 2 O 3 layer.…”

Section: Eis Datamentioning

confidence: 99%

Efecto del tratamiento de sellado en el comportamiento frente a corrosión de la aleación anodizada de aluminio-litio AA2099

et al. 2020

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El comportamiento frente a corrosión de la aleación de aluminio AA2099 anodizado en solución de H2SO4, aplicando dos densidades de corriente diferentes, 0,19 o 1,0 A·cm−2, con dos tratamientos de sellado diferentes en H2O y en Na2Cr2O7 (6% peso) a 95 °C, se ha estudiado en disoluciones de NaCl (3,5% peso) y de H2SO4 (10% vol). La aleación AA2099 se usa ampliamente en aplicaciones aeronáuticas, por tanto, se requiere que presente un buen comportamiento frente a la corrosión en ambientes de cloruro y lluvia ácida. La morfología de la superficie de la película anodizada se caracterizó por microscopía electrónica de barrido (MEB), se estudió el comportamiento frente a corrosión electroquímica empleando la impedancia electroquímica (EIS), y finalmente la caracterización de la composición química de la superficie se reveló por espectroscopía de fotoelectrones de rayos X (XPS). Se encontró que el tratamiento de sellado con Na2Cr2O7 (6% peso), genera una capa pasiva más homogénea y compacta, y tiende a aumentar la resistencia a la transferencia de carga, mejorando así el comportamiento frente a corrosión del AA2099 anodizado.

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Section: Eis Datamentioning

confidence: 99%

Efecto del tratamiento de sellado en el comportamiento frente a corrosión de la aleación anodizada de aluminio-litio AA2099

et al. 2020

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“…Chemolithotrophic organisms obtain energy from the oxidation and/or reduction of inorganic compounds [101,102], namely iron, sulphur and manganese [103,104]. Nevertheless, microorganisms can interact with other elements such as chromium, molybdenum, vanadium, technetium, polonium, uranium, neptunium, plutonium and other rare earth elements [103,[105][106][107]. The role of microorganisms on corrosion is modulated by multiple factors and their effects cannot be attributed to a specific organism or chemical reaction: some microorganisms and biofilms have been proved to have inhibitive effects on corrosion [108].…”

Section: Emerging Trends Of Electrospun Coatings: the Case Of Biocorrmentioning

confidence: 99%

Electrospinning: A Powerful Tool to Improve the Corrosion Resistance of Metallic Surfaces Using Nanofibrous Coatings

Rivero

Redin

Rodríguez

2020

Metals

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The use of surface engineering techniques to tune-up the composition of nanostructured thin-films for developing functional coatings with advanced properties is a hot topic within the scientific community. The control of the coating structure at the nanoscale level allows improving the intrinsic properties of the surface compared to bulk materials. A nanodeposition technique with increasing popularity in the field of nanotechnology is electrospinning. This technique permits the fabrication of long and continuous fibres on the micro-nano scale. The good control over fibre morphology combined with its simplicity, cost-effectiveness, easy exploitability and scalability make electrospinning a very interesting tool for technological applications. This review is focused on the use of the electrospinning technique to protect metallic surfaces against corrosion. Polymeric precursors, from natural or biodegradable to synthetic polymers and copolymers can be electrospun with an adequate control of the operational deposition parameters (applied voltage, flow rate, distance tip to collector) and the intrinsic properties of the polymeric precursor (concentration, viscosity, solvent). The electrospun fibres can be used as an efficient alternative to encapsulate corrosion inhibitors of different nature (inorganic or organic) as well as self-healing agents which can be released to reduce the corrosion rate in the metallic surfaces.

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“…The identified fungal genera in the current study coincide with the ones isolated from space stations, such as Penicillium , Aspergillus (Knox et al ., 2016; Checinska Sielaff et al ., 2019), Cladosporium (Novikova, 2004; Novikova et al ., 2006), Rhodotorula (Reidt et al ., 2017; Checinska Sielaff et al ., 2019). Furthermore, the studies have revealed their metal deterioration capacity, e.g., Penicillium (Yang et al ., 1996, 1998; Smirnov et al ., 2008), Aspergillus (Dai et al ., 2017; Jirón-Lazos et al ., 2018), Cladosporium (Yang et al ., 1998), Fusarium (Yang et al ., 1998; Smirnov et al ., 2008). Penicillium and Aspergillus are also studied to be acid-tolerant genera (Kawai et al ., 2000; Glukhova et al ., 2018).…”

Section: Discussionmentioning

confidence: 99%

Acid and aluminium-tolerant microbes isolated from China space station assembly cleanroom surfaces and identified by 16S rRNA/ITS sequencing and MALDI-TOF MS

Rcheulishvili

Papukashvili

Shakir

et al. 2021

International Journal of Astrobiology

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Corrosion of aluminium (Al) is a potential problem for spacecraft as this metal is used for various mechanical parts due to its strength, durability, etc. However, it can be corroded by certain factors including microbes. Studying microbes which can be implicated in microbiologically influenced corrosion (MIC) due to their extremophilic nature is of vital importance. In this current study, Al and acid-tolerant microbes were isolated from the samples of China space station assembly cleanroom surfaces; acidic environments can accelerate the corrosion process on metal surfaces. Nine bacterial and 10 fungal strains were identified with 16S ribosomal RNA gene/internal transcribed spacer region sequencing and matrix-assisted laser desorption/ionization time-of-flight mass spectrometry. The dominant bacteria were of Bacillus, fungi of Penicillium and Aspergillus genera. Knowing the microbes which may be conveyed from the cleanrooms to the space stations with a potential capacity of Al degradation is important for long-term maintenance of station components. This study might aid in designing further researches of the aforementioned microorganisms and, therefore, contribute to the prevention of MIC.

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Localized corrosion of aluminum alloy 6061 in the presence of Aspergillus niger

Cited by 44 publications

References 47 publications

Efecto del tratamiento de sellado en el comportamiento frente a corrosión de la aleación anodizada de aluminio-litio AA2099

Efecto del tratamiento de sellado en el comportamiento frente a corrosión de la aleación anodizada de aluminio-litio AA2099

Electrospinning: A Powerful Tool to Improve the Corrosion Resistance of Metallic Surfaces Using Nanofibrous Coatings

Acid and aluminium-tolerant microbes isolated from China space station assembly cleanroom surfaces and identified by 16S rRNA/ITS sequencing and MALDI-TOF MS

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