Influence of dissolved oxygen content on the bacteria‐induced ennoblement of stainless steels in seawater and its consequence on the localized corrosion risk

Trigodet, Florian; Larché, Nicolas; Morrison, Hilary G.; Maignien, Loïs; Thierry, Dominique

doi:10.1002/maco.201911225

Cited by 7 publications

(2 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Another study that was conducted by Dexter 25 regarded the exposure time and seawater treatment (filtered or nonfiltered) as important factors that can profoundly affect the corrosion potential, and they registered potentials between +0.2 and −0.4 V vs the saturated calomel electrode (SCE). Thus, establishing a potential range can be more suitable when presenting the evolution of the corrosion potential due to the diverse factors that may produce changes in exposed materials, such as the exposure time, 43 the temperature, 44 the chloride concentration 45 and the presence of microorganisms. 22,44,46,47 In this study, the electrochemical reduction process onset around at −0.2 V (vs Ag/AgCl), and a passivation process, that a large amount of biomass might explain, was observed on the coupons.…”

Section: Discussionmentioning

confidence: 99%

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

et al. 2021

View full text Add to dashboard Cite

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.

show abstract

Section: Discussionmentioning

confidence: 99%

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

et al. 2021

View full text Add to dashboard Cite

show abstract

“…Более того, композиционные Cr-Ti-покрытия показывают более высокую коррозионную стойкость по сравнению с чистыми хромовым или титановым покрытиями [11]. Однако известно, что даже коррозионно-устойчивые хромовые сплавы могут подвергаться локальной коррозии, вызванной микробным облагораживанием [12]. С другой стороны, установлено, что добавление в сплав более 5 мас.…”

Section: введение введениеunclassified

Electrospark deposition of Fe–Cr–Cu coatings on St3 steel

Burkov,

Kulik

2023

Izv. VUZ. Poroshk. Met.

View full text Add to dashboard Cite

It is well-known that chromium in metallic compositions forms dense passivating films that slow down corrosion. The new Fe–Cr–Cu coating was applied on St3 steel through electrospark deposition in an anode mixture consisting of copper and titanium granules, with the addition of chromium powder ranging from 4.85 to 13.26 wt. %. The weight gain of the cathode increased nearly twofold with the addition of chromium powder to the anode mixture. The structure of the coatings was analyzed through X-ray phase analysis, scanning electron microscopy, and energy dispersive spectrometry. The phase composition of the coatings consists of ferrochrome and copper. It is demonstrated that the proposed method of electrospark processing allows for the creation of Fe–Cr–Cu coatings with an average chromium concentration ranging from 55 to 83 at. %. The average copper content in the prepared coatings varied from 5 to 16 at. %. The highest concentration of chromium was observed in the coating prepared with the addition of 13.26 wt. % Cr to the anodic mixture. The corrosion behavior of the coatings was investigated using potentiodynamic polarization and impedance spectroscopy in a 3.5 % NaCl solution. Polarization tests have shown that applying Fe–Cr–Cu coatings to St3 steel can increase its corrosion potential by 12 to 19 % and reduce the corrosion current by 1.5 to 3.4 times. The microhardness of the coating surface ranged from 3.08 to 4.37 GPa, and the coefficient of friction ranged from 0.75 to 0.91. The maximum hardness and the lowest coefficient of friction were observed in the coating with the highest chromium content. It has been demonstrated that Fe–Cr–Cu coatings can enhance the wear resistance of the surface of St3 steel by 1.5 to 3.8 times.

show abstract

Shifts in bacterial communities and antibiotic resistance genes in surface water and gut microbiota of guppies (Poecilia reticulata) in the upper Rio Uberabinha, Brazil

Jia

Silva

Plath

et al. 2021

Ecotoxicology and Environmental Safety

View full text Add to dashboard Cite

Influence of dissolved oxygen content on the bacteria‐induced ennoblement of stainless steels in seawater and its consequence on the localized corrosion risk

Cited by 7 publications

References 17 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

Electrospark deposition of Fe–Cr–Cu coatings on St3 steel

Shifts in bacterial communities and antibiotic resistance genes in surface water and gut microbiota of guppies (Poecilia reticulata) in the upper Rio Uberabinha, Brazil

Contact Info

Product

Resources

About