Impact of biofilm in the maturation process on the corrosion behavior of galvanized steel: long-term evaluation by EIS

Unsal, Tuba; Cansever, Nurhan; Ilhan-Sungur, Esra

doi:10.1007/s11274-019-2592-2

Cited by 9 publications

(3 citation statements)

References 32 publications

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“…The pore resistance ( R pore ), along with the capacitance ( C pore ), was of the same order of magnitude in all conditions. The similarity in the values was related to the seawater that the biofilm contained within its pores, hence, it was represented as a porous diffuse layer . However, the biofilm resistance ( R bf ), along with the associated capacitance ( C bf ), varied when the substrates were immersed at a depth of 15 m. In this case, both parameter values at 15 m depth tend to be less than those for the substrates that were immersed at 5 m and under laboratory conditions.…”

Section: Resultsmentioning

confidence: 97%

Testing the Test: A Comparative Study of Marine Microbial Corrosion under Laboratory and Field Conditions

et al. 2021

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Microbially influenced corrosion (MIC) is an aggressive type of corrosion that occurs in aquatic environments and is sparked by the development of a complex biological matrix over a metal surface. In marine environments, MIC is exacerbated by the frequent variability in environmental conditions and the typically high diversity of microbial communities; hence, local and in situ studies are crucial to improve our understanding of biofilm composition, biological interactions among its members, MIC characteristics, and corrosivity. Typically, material performance and anticorrosion strategies are evaluated under controlled laboratory conditions, where natural fluctuations and gradients (e.g., light, temperature, and microbial composition) are not effectively replicated. To determine whether MIC development and material deterioration observed in the laboratory are comparable to those that occur under service conditions (i.e., field conditions), we used two testing setups, in the lab and in the field. Stainless steel (SS) AISI 316L coupons were exposed to southeastern Pacific seawater for 70 days using (i) acrylic tanks in a running seawater laboratory and (ii) an offshore mooring system with experimental frames immersed at two depths (5 and 15 m). Results of electrochemical evaluation, together with those of microbial community analyses and micrographs of formed biofilms, demonstrated that the laboratory setup provides critical information on the early biofilm development process (days), but the information gathered does not predict deterioration or biofouling of SS surfaces exposed to natural conditions in the field. Our results highlight the need to conduct further research efforts to understand how laboratory experiments may better reproduce field conditions where applications are to be deployed, as well as to improve our understanding of the role of eukaryotes and the flux of nutrients and oxygen in marine MIC events.

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Section: Resultsmentioning

confidence: 97%

Testing the Test: A Comparative Study of Marine Microbial Corrosion under Laboratory and Field Conditions

et al. 2021

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“…Carson et al (2013) reported also similar results. It shows that the formation and development processes of biofilm have a dynamic structure (Unsal et al 2019). The maximum level of AHB was detected on PE after 48 h. Also, statistical analysis showed that there is no relationship between AHB levels and plastic types (p>0.05).…”

Section: Discussionmentioning

confidence: 99%

“…Hydroids, fungi and pathogenic bacteria can also adhere to the microplastics surface and live for a long time and be easily transported in the marine environment (Carpenter and Smith, 1972;Rummel et al 2017). Biofilm formation is a complex and dynamic process (Unsal et al 2019). In the first step of bacterial attachment, organic and inorganic molecules in the bulk are carried toward the surface.…”

Section: Introductionmentioning

confidence: 99%

Enumeration of Aerobic Heterotrophic Bacteria in Early-Stage of Biofilm Formed on Different Plastic Types

Unsal¹,

Caglar²

2023

International Journal of Environment and Geoinformatics

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In this study, the total number of aerobic hetetotrophic bacteria (AHB) in early-stage of biofilm formed on different plastic types commonly used in daily life, namely polyethylene (PE), polypropylene (PP), polystyrene (PS) was investigated in a water recirculating test system. The Golden Horn Estuary’s water was used as a system water. The test system was operated continuously for 504 h and natural biofilm formation was ensured. The physicochemical properties of system water were measured each sampling time. Bacterial attachment was observed on all plastic surfaces even within the first hours. Also, macroscopic images proved that the biofilm layer formed and flourished on all plastic surfaces over time. After 504 h, the levels of AHB on the plastic coupons were detected as 1.4×105, 1.2×105 and 1.8×105 cells cm−2 for PE, PP and PS, respectively. To investigate the number of bacterial cells in early-stage of biofilm formation on plastic surfaces will create an important basis for future research in terms of evaluating the effects of microplastics on the environment and human health.

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The influence of Ag-Cu ions on natural biofilms of variable ages: Evaluation of MIC

Unsal

Cansever

Ilhan-Sungur

2022

Bioelectrochemistry

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Impact of biofilm in the maturation process on the corrosion behavior of galvanized steel: long-term evaluation by EIS

Cited by 9 publications

References 32 publications

Testing the Test: A Comparative Study of Marine Microbial Corrosion under Laboratory and Field Conditions

Testing the Test: A Comparative Study of Marine Microbial Corrosion under Laboratory and Field Conditions

Enumeration of Aerobic Heterotrophic Bacteria in Early-Stage of Biofilm Formed on Different Plastic Types

The influence of Ag-Cu ions on natural biofilms of variable ages: Evaluation of MIC

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