In-Situ Polarized Neutron Reflectometry Study of the Passive Film Growth on Fe-20Cr Alloy

Ha, Hung M.; Fritzsche, H.

doi:10.1149/2.0081911jes

Cited by 1 publication

(3 citation statements)

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“…NR has been applied to study oxidation, corrosion and adsorption of corrosion inhibitors on a range of metal surfaces, including Fe, − FeCr alloys and stainless steel, , Ni and Ni alloys, − Co, Cu, − Ti, ,− Zr, − and Al. − For a more comprehensive coverage of the literature, see reviews in refs and .…”

Section: Case Studiesmentioning

confidence: 99%

“…Several NR corrosion studies deal with aqueous systems, investigating passive films on metals. ,− ,,,,− , Much of this work focuses on changes in the morphology and composition of the surface layers induced in situ by electrochemical polarization and solution pH. The experiments generally involve thin metallic films deposited on highly flat, neutron-transparent substrates, typically single crystal silicon.…”

Section: Case Studiesmentioning

confidence: 99%

“…NR was used to help elucidate the morphological and chemical changes induced by such treatments. Ha et al , used PNR to investigate the effect of applied potential on passive film growth in alkaline solution on a Fe(80%)-Cr(20%) alloy and on nickel, respectively. Both metals were deposited on Si substrates.…”

Section: Case Studiesmentioning

confidence: 99%

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Neutron Reflectivity in Corrosion Research on Metals

Karlsson,

Johansson,

Mazzei

et al. 2024

ACS Mater. Au

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Neutron reflectivity (NR) is potentially a powerful tool for characterizing chemical and morphological changes in thin films and at buried interfaces in corrosion science. While the scope of NR is limited by its inherent demands for low surface roughness and high sample planarity, these drawbacks are compensated for by the unique ability to detect light elements and distinguish between isotopes. Furthermore, the generally weak absorption of neutrons by matter allows the use of bulky sample environments and in situ experiments. In particular, the layer thickness range of 3–100 nm accessible by NR is appropriate for studying air-formed films and passive films, which are crucial for the ability of metallic materials to resist corrosion, as well as for investigating the interaction of metal surfaces with hydrogen and its compounds, e.g., water. Also, NR is suitable for studying early stages of oxide growth on metals at high temperature, including the transition from Cabrera–Mott-type films to Wagner-type growth. Here, we outline key characteristics of NR as applied to the study of corrosion of metals, exemplified by earlier work, and discuss perspectives for future work in the field. The aim of our work is to stimulate the application of the unique capabilities of NR to corrosion science.

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