A reinterpretation of the Romanoff NBS data for corrosion of steels in soils

Melchers, Robert E.; Petersen, Robert B.

doi:10.1080/1478422x.2017.1417072

Cited by 39 publications

(54 citation statements)

References 38 publications

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“…88,89 Fine soils such as sands cause little corrosion, whereas stiff lumpy clays, when used as back-fill, leave large voids and cause severe localised corrosion, including after many years exposure. 90 These findings are entirely consistent with industry field observations.…”

Section: Effect Of the Environmentsupporting

confidence: 84%

Predicting long-term corrosion of metal alloys in physical infrastructure

Melchers

2019

npj Mater Degrad

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The conditions for initiation and the subsequent development of the severity of corrosion of metal alloys in the short term continue to be of research interest. However, for most physical infrastructure the critical issue often is the development and progression of corrosion under some level of oxygenated conditions, over several decades. In many cases this has significant implications for safety and for economic loss. Increasingly, asset management decision-making requires robust tools or models to predict the effect of corrosion, including loss, pit depth and crevice severity. The present capability in this area is reviewed and available models generally compared, including their degree of empiricism and their relationship to corrosion science fundamentals. It is argued that in addition to the role of material imperfections and corrosion products, the immediate physical environment adjacent to the metal alloy also can play a major role. These aspects are explored and some speculation made about required future research directions.

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Section: Effect Of the Environmentsupporting

confidence: 84%

Predicting long-term corrosion of metal alloys in physical infrastructure

Melchers

2019

npj Mater Degrad

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“…However, this is not the case, and too little efforts have been directed at characterizing the reactivity of Fe 0 materials [22,23]. This is very unfortunate in a context where it is welldocumented that the Fe 0 corrosion rate can vary over several orders of magnitude [24]. Equations 1 and 4 demonstrate that twice more Fe 0 is consumed for the reduction of RCl than it would have been in a electrochemical reaction (Eq.…”

Section: The Future Of Fe-based Filtration Systemsmentioning

confidence: 99%

Realizing the potential of metallic iron for environmental remediation: Flee or adapt?

Hu¹,

Yang²,

Cao³

et al. 2021

Preprint

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The evidence that metallic iron (Fe0) is not an environmental reducing agent has been declared to be a claim. Researchers presenting their findings in a scientific journal have to accept the burden of proving that their argumentation has any validity. This 30-year-lasting discussion within the Fe0 remediation community is alien to graduate chemists, as it is a century old electrochemistry knowledge. Nevertheless, the peer review literature on "remediation using Fe0" seems to be aggressively controlled by self-appointed experts (e.g., journal editors) who are not tolerating any alternative thinking. This communication demonstrates the fallacy of the view that Fe0 donates any electron to a dissolved species. The sole goal is to reconcile a proven efficient technology with his scientific roots, and enable the design of better Fe0 remediation systems.

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“…Under environmental conditions, Fe 0 is spontaneously oxidized to Fe II and Fe III oxides/hydroxides (iron corrosion products-FeCPs) which remove contaminants from an aqueous solution by adsorption and co-precipitation [4][5][6][7]. An inherent problem of Fe 0 is that its corrosion rate decreases with increasing service life [8]. This property has been termed as reactivity loss in the Fe 0 literature.…”

Section: Introductionmentioning

confidence: 99%

The Suitability of Methylene Blue Discoloration (MB Method) to Investigate the Fe0/MnO2 System

Cao¹,

Alyoussef²,

Gatcha-Bandjun

et al. 2021

Processes

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The typical time-dependent decrease of the iron corrosion rate is often difficult to consider while designing Fe0-based remediation systems. One of the most promising approaches is the amendment with manganese dioxide (Fe0/MnO2 system). The resulting system is a very complex one where characterization is challenging. The present communication uses methylene blue discoloration (MB method) to characterize the Fe0/MnO2 system. Shaken batch experiments (75 rpm) for 7 days were used. The initial MB concentration was 10 mg L−1 with the following mass loading: [MnO2] = 2.3 g L−1, [sand] = 45 g L−1, and 0 < [Fe0] (g L−1) ≤ 45. The following systems where investigated: Fe0, MnO2, sand, Fe0/MnO2, Fe0/sand, and Fe0/MnO2/sand. Results demonstrated that MB discoloration is influenced by the diffusive transport of MB from the solution to the aggregates at the bottom of the test-tubes. Results confirm the complexity of the Fe0/MnO2/sand system, while establishing that both MnO2 and sand improve the efficiency of Fe0/H2O systems in the long-term. The mechanisms of water decontamination by amending Fe0-based systems with MnO2 is demonstrated by the MB method.

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A reinterpretation of the Romanoff NBS data for corrosion of steels in soils

Cited by 39 publications

References 38 publications

Predicting long-term corrosion of metal alloys in physical infrastructure

Predicting long-term corrosion of metal alloys in physical infrastructure

Realizing the potential of metallic iron for environmental remediation: Flee or adapt?

The Suitability of Methylene Blue Discoloration (MB Method) to Investigate the Fe0/MnO2 System

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