Neutron Reflectometry for Studying Corrosion and Corrosion Inhibition

Wood, Mary H.; Clarke, Stuart M.

doi:10.3390/met7080304

Cited by 17 publications

(21 citation statements)

References 120 publications

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“…Whilst both XRR and NR are extremely powerful in characterising the structural features of corrosive systems at the angstrom-scale, they remain relatively untapped techniques in this area 40…”

Section: Introductionmentioning

confidence: 99%

An X-ray and Neutron Reflectometry Study of Iron Corrosion in Seawater

Wood

Welbourn

et al. 2018

Langmuir

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The corrosive breakdown of thin iron films supported on silicon substrates under a number of conditions is presented-in particular to understand better how iron, and hence ferritic steel, behaves in a salty water environment. A combination of X-ray and neutron reflectometry was used to monitor the structures of both metal and oxide surface layers and also organic corrosion inhibitors adsorbed at the iron/aqueous interface. A range of behavior in seawater was observed, including complete dissolution and void formation under the metal surface. Importantly, two simple treatments-UV/ozone or soaking in ultrapure water-were found to significantly protect the iron surface for considerable lengths of time, although evidence of pitting corrosion began after around 10 days. The underlying causes of the efficacies of these treatments were further investigated using X-ray photoelectron spectroscopy. In addition, three potential corrosion inhibitors were investigated: (i) dodecyltrimethylammonium bromide (DTAB) demonstrated no ability to protect the surface; (ii) sodium dodecyl sulfate (SDS) appeared to accelerate corrosion; and (iii) bis(2-ethylhexyl)phosphate showed an impressive level of protection (the neutron reflectometry results indicated a thick diffuse layer of surfactant of 23% surface coverage). These findings have been interpreted in terms of preferential inhibitor adsorption at cathodic and anodic surface sites (depending on the nature of the inhibitor).

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Section: Introductionmentioning

confidence: 99%

An X-ray and Neutron Reflectometry Study of Iron Corrosion in Seawater

Wood

Welbourn

et al. 2018

Langmuir

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“…Corrosion is a very expensive industrial problem and there has been a growing number of articles using NR to investigate this, with recent review articles discussing developments in the field e.g. [61,62]. NR has been applied to an increasing range of metal surfaces including Fe, [14,15] Ni, [27,28] Cu, [19] Ti, [18] and steel.…”

Section: Corrosion and Metalsmentioning

confidence: 99%

New insights into the solid–liquid interface exploiting neutron reflectivity

Welbourn¹,

Clarke

2019

Current Opinion in Colloid & Interface Science

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We outline recent progress exploiting neutron reflectivity for structural and compositional investigations of the solid-liquid interface. There has been extensive activity in this area, with key areas of development: (i) an increased range of accessible substrates (e.g. metals and minerals), (ii) novel liquid phases, and (iii) strong themes in electrochemistry (e.g. batteries), corrosion, polymers and increasing application of extreme conditions.

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“…The economic cost of corrosion is estimated to be 3 to 4% of the gross domestic product of industrialized nations [Wood and Clarke, 2017;Wood et al, 2018]. On metal surfaces, the corrosion process is complex and involves oxides, hydroxides, and other thin films [Wood and Clarke, 2017]. In addition to time, environmental conditions such as stress, temperature, or radiation can alter the rates of corrosion processes.…”

Section: Understanding Fundamental Corrosion Mechanismsmentioning

confidence: 99%