Induction of pitting corrosion on stainless steel (grades 304 and 316) used in dairy industry by biofilms of common sporeformers

Gupta, Somil; Anand, S. K.

doi:10.1111/1471-0307.12444

Cited by 26 publications

(10 citation statements)

References 48 publications

(103 reference statements)

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“…Thermophilic bacteria can attach to stainless steel coupons and support biofilms’ development ( Jindal et al 2016 ; Gupta and Anand, 2018 ). In this paper, six abiotic surfaces were compared in terms of viable cell counts within biofilms.…”

Section: Discussionmentioning

confidence: 99%

Biofilm-Forming Ability and Effect of Sanitation Agents on Biofilm-Control of Thermophile Geobacillus sp. D413 and Geobacillus toebii E134

Kiliç

2020

Polish Journal of Microbiology

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Geobacillus sp. D413 and Geobacillus toebii E134 are aerobic, non-pathogenic, endospore-forming, obligately thermophilic bacilli. Gram-positive thermophilic bacilli can produce heat-resistant spores. The bacteria are indicator organisms for assessing the manufacturing process’s hygiene and are capable of forming biofilms on surfaces used in industrial sectors. The present study aimed to determine the biofilm-forming properties of Geobacillus isolates and how to eliminate this formation with sanitation agents. According to the results, extracellular DNA (eDNA) was interestingly not affected by the DNase I, RNase A, and proteinase K. However, the genomic DNA (gDNA) was degraded by only DNase I. It seemed that the eDNA had resistance to DNase I when purified. It is considered that the enzymes could not reach the target eDNA. Moreover, the eDNA resistance may result from the conserved folded structure of eDNA after purification. Another assumption is that the eDNA might be protected by other extracellular polymeric substances (EPS) and/or extracellular membrane vesicles (EVs) structures. On the contrary, DNase I reduced unpurified eDNA (mature biofilms). Biofilm formation on surfaces used in industrial areas was investigated in this work: the D413 and E134 isolates adhered to all surfaces. Various sanitation agents could control biofilms of Geobacillus isolates. The best results were provided by nisin for D413 (80%) and α-amylase for E134 (98%). This paper suggests that sanitation agents could be a solution to control biofilm structures of thermophilic bacilli.

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Section: Discussionmentioning

confidence: 99%

Biofilm-Forming Ability and Effect of Sanitation Agents on Biofilm-Control of Thermophile Geobacillus sp. D413 and Geobacillus toebii E134

Kiliç

2020

Polish Journal of Microbiology

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“…As a result of the minimisation or complete removal of stains and small scratches, electropolishing makes it possible to highlight the surface gloss. Stainless steel corrosion can also occur much faster than expected in certain types of environment in pharmaceutical manufacturing 15 and in other industries 16 , 17 . Insidious corrosion, or corrosion that occurs in localized environments rather than generalized corrosion, can be extremely destructive because it is difficult to detect.…”

Section: Introductionmentioning

confidence: 97%

A multi-factorial mathematical model for the selection of electropolishing parameters with a view to reducing the environmental impact

Lochyński

Charazińska

Karczewski

et al. 2021

Sci Rep

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Electrochemical metal processing is a process that generates harmful pollution. An important goal often disregarded by researchers is not only the achievement of the best possible quality of electropolished surface, but also minimising the load of metal ions in the wastewater generated in the process. The conducted experiments on the electropolishing of stainless steel in laboratory conditions, varied time, temperature and current density conditions, as well as process bath contamination (ranging from 0 to 6% Fe mass) allowed us to develop a multi-factorial mathematical model. This model offers the possibility of being able to select the process parameters recommended for achieving the desired effects. It takes into account such surface quality parameters as roughness and gloss, process duration and current density that determine power consumption, as well as the weight loss of the electropolished element that influence the rate of contamination in processing baths and wastewater. The study presents the composition of a passive film of stainless steel after the electropolishing process at the initial and final stages of the process bath’s exploitation. The results obtained from XPS tests were then correlated with the results of corrosion tests and resistance to pitting corrosion in the environment of 0.1 M NaCl.

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“…The propensity of stainless steels to pitting corrosion in chloride‐containing environments is still a concern in several industrial applications 1–3 . Passivation is a widespread method for improving the corrosion resistance of these materials, by removing anodic surface contaminants or thickening the passive film 4,5 .…”

Section: Introductionmentioning

confidence: 99%

“…The propensity of stainless steels to pitting corrosion in chloridecontaining environments is still a concern in several industrial applications. [1][2][3] Passivation is a widespread method for improving the corrosion resistance of these materials, by removing anodic surface contaminants or thickening the passive film. 4,5 Nitric acid passivation is the traditional route toward this goal, being set out as part of postmanufacturing needs for stainless steel devices in the aircraft, aerospace, and biomedical industries.…”

Section: Introductionmentioning

confidence: 99%

Interplay between the composition of the passive film and the corrosion resistance of citric acid‐passivated AISI 316L stainless steel

Costa

Oliveira

Antunes

2020

Surface & Interface Analysis

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Citric acid passivation is an attractive alternative to increase the corrosion resistance of stainless steels. In this work, the correlation of passive film composition and the corrosion properties of citric acid-passivated AISI 316L stainless steel samples was assessed. The concentration of citric acid in the passivating solution was varied from 10 to 30 wt.%. Passive film composition was examined by X-ray photoelectron spectroscopy. The corrosion behavior was investigated by potentiodynamic polarization curves. The citric acid passivation treatment led to Cr 2 O 3 enrichment of the passive film, especially for the 20-wt.% concentration. By increasing the citric acid concentration to 30 wt.%, the corrosion resistance decreased. In addition to chromium compounds, the passivation treatment also affected the relative concentrations of Fe, Mo, and Ni compounds in the passive films. The formation of Mo oxides was triggered at citric acid concentrations of 10 and 20 wt.%, contributing to slower anodic dissolution rate. The corrosion resistance of the passivated samples was favored as the relative concentration of Fe oxides (FeO and Fe 2 O 3) increased with respect to FeOOH.

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Induction of pitting corrosion on stainless steel (grades 304 and 316) used in dairy industry by biofilms of common sporeformers

Cited by 26 publications

References 48 publications

Biofilm-Forming Ability and Effect of Sanitation Agents on Biofilm-Control of Thermophile Geobacillus sp. D413 and Geobacillus toebii E134

Biofilm-Forming Ability and Effect of Sanitation Agents on Biofilm-Control of Thermophile Geobacillus sp. D413 and Geobacillus toebii E134

A multi-factorial mathematical model for the selection of electropolishing parameters with a view to reducing the environmental impact

Interplay between the composition of the passive film and the corrosion resistance of citric acid‐passivated AISI 316L stainless steel

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