The effects of SO2 and NH3 on the atmospheric corrosion of galvanized iron sheet

Dehri, İlyas; Yazıcı, Birgül; Erbil, M.; Galip, H.

doi:10.1016/0010-938x(94)90016-7

Cited by 17 publications

(19 citation statements)

References 20 publications

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“…In this study, soluble Zn levels were much higher on galvanized steel materials in comparison with wood (Table 2). Assuming that the Zn levels presented in Table 2 are dissolved in a thin moisture film, it can be expected that the levels of Zn will be toxic to most bacteria, particularly if the pH is low (ca 5-50 mM M Zn; Dehri et al 1994). The metabolic activity of E. coli O157 is greater at temperatures of 20°C compared with 5°C and our results show that pathogen die-off on galvanized steel was much more pronounced at 20°C compared with 5°C.…”

Section: Discussionmentioning

confidence: 59%

Section: Discussionmentioning

confidence: 99%

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Persistence of Escherichia coli O157 on farm surfaces under different environmental conditions

et al. 2005

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Aims:To compare the persistence of Escherichia coli O157 on a variety of common faecally contaminated farmyard material surfaces (wood and steel) under different moisture and temperature regimes. Methods and Results: Samples of field-conditioned farmyard materials (galvanized steel and wood) were cut into pieces and contaminated with fresh cattle faeces inoculated with nontoxigenic E. coli O157 (strain 3704). Thereafter, they were stored at four different environmental conditions; with temperature (5 and 20°C) and moisture (moist or dry) as variables. Transfer of the pathogen to hands from the surfaces was also evaluated. Escherichia coli O157 numbers declined over time on all surfaces albeit at different rates according to the sample material and environmental conditions. Persistence was greatest on moist wood samples under cooler temperatures with large population numbers remaining after 28 days. Desiccation of surfaces resulted in a more rapid decline in E. coli O157 populations under both temperature regimes. Substantial numbers of colonies may also potentially be transferred to human hands from the surfaces during brief contact. Conclusions: When environmental conditions are favourable, E. coli O157 may persist for considerable times on a range of surfaces. However, when exposed to higher temperatures and dehydration, survival is notably decreased. Overall, bacterial persistence was significantly greater on wood samples relative to steel. Significance and Impact of the Study: Escherichia coli O157 is a prevalent pathogen, common in ruminant faeces. Contact with contaminated faeces may lead to human infection, resulting in possible severe illness. Although our study used only one strain of bacteria, our findings indicates that E. coli O157 has the potential to persist for long periods of time on gates, stiles and other farmyard surfaces under a range of environmental conditions. These farmyard surfaces therefore pose a potential infection pathway particularly where there is a high risk of direct human contact (e.g. child petting zoos, open farms).

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Section: Discussionmentioning

confidence: 59%

Section: Discussionmentioning

confidence: 99%

Persistence of Escherichia coli O157 on farm surfaces under different environmental conditions

et al. 2005

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“…The accelerated corrosion rate could be explained by the change of water chemistry resulting from the addition of ammonia. In a NH 3 containing solution, some of the NH 3 dissolves in the water as shown in the following equation until the equilibrium NH 3 /NH 4 + /OH is established [13,14].…”

Section: Discussionmentioning

confidence: 99%

Influence of ammonia on the corrosion behavior of Ti−Al−Zr alloy in 360°C water

et al. 2007

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The influence of ammonia on the corrosion behavior of Ti-Al-Zr alloy was evaluated in pressurized water at 360°C for 600 days. The results of the corrosion test indicated that the addition of ammonia accelerated the corrosion and hydrogen pickup rates. The oxide scales were composed of a double layer structure, and an inner layer was covered by an outer layer of oxide grains. The XRD studies on the oxide scales showed that the anatase-TiO 2 was continuously transformed into rutile-TiO 2 as the corrosion proceeded. When the same weight gain was considered, the oxide layer grown in water appeared to have a much higher rutile weight fraction than that grown in the ammonia aqueous solution. The deterioration of the corrosion behavior by the ammonia could be mainly attributed to the retardation in the transformation of the oxide structure from a metastable anatase phase to a stable rutile one.

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“…The interaction of SO 2 with metals such as Ni, Fe, Al and their alloys can cause the corrosion, which is studied by many researchers [1][2][3][4][5][6][7][8]. Metals exposed in the air are usually covered with a layer of oxide film related to the corrosion resistance of the metals [9].…”

Section: Introductionmentioning

confidence: 99%

Density functional theory study of SO 2 -adsorbed Ni(1 1 1) and hydroxylated NiO(1 1 1) surface

Wei

Dong

Chen

et al. 2015

Applied Surface Science

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The effects of SO2 and NH3 on the atmospheric corrosion of galvanized iron sheet

Cited by 17 publications

References 20 publications

Persistence of Escherichia coli O157 on farm surfaces under different environmental conditions

Persistence of Escherichia coli O157 on farm surfaces under different environmental conditions

Influence of ammonia on the corrosion behavior of Ti−Al−Zr alloy in 360°C water

Density functional theory study of SO 2 -adsorbed Ni(1 1 1) and hydroxylated NiO(1 1 1) surface

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