On the effect of plastic pre-straining on the corrosion behaviour of a duplex stainless steel and how the emergence of slip steps affects the hydrogen evolution reaction kinetics

David, Charles J.; Ruel, Fiona; Boissy, Clément; Roche, Virginie; Véron, M.; Nogueira, R.P.

doi:10.1016/j.corsci.2020.109167

Cited by 11 publications

(1 citation statement)

References 45 publications

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“…However, at temperatures The responses of the coatings at high temperatures are evaluated by employing two tests; the first one, to determine the rate of corrosion and the corrosion kinetics, is the potentiodynamic polarization technique (Figures 3 and 4). The evaluation of the oxidation of the coatings in molten salts simulates severe conditions in atmospheres, with the presence of contaminants and materials used in pipes that must withstand high temperatures in combustion processes (580 • C) [21,22]. Hence, a coated film aims to protect the base material, which is the same steel previously used for this purpose.…”

Section: High-temperature Corrosionmentioning

confidence: 99%

High-Temperature Corrosion Behavior of Bi3.75La0.25Ti3O12 and Bi3La1Ti3O12 Coating Prepared by rf Magnetron Sputtering

Bautista-Ruiz

Sánchez-Molina

Aperador

2022

Metals

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Using the rf magnetron sputtering technique, Bi3.75La0.25Ti3O12 and Bi3La1Ti3O12 coatings were formed and obtained as a thin film on Hastelloy substrates. When subjected to high-temperature conditions, the effect of lanthanum on the anti-corrosive properties of the coatings was investigated. The anti-corrosive response was evaluated by electrochemical impedance spectroscopy and potentiodynamic curves, which are rarely reported. Hot corrosion occurs through the electrochemical mechanism, and more information can be obtained through electrochemical corrosion tests, which are very effective and fast. The electrochemical behavior at high temperatures was studied via molten salt corrosion tests, potentiodynamic polarization curves, and electrochemical impedance spectroscopy. Additionally, the coatings were evaluated via scanning electron microscopy and transmission microscopy to determine their morphology. With X-ray diffraction, the crystallinity of the films was determined. It was determined that the corrosion rate directly correlates with the temperature, attributed to the mechanisms induced by the Na2SO4 and V2O5 salts that generated condensation. As the temperature increases, the density of the corrosion current increases in the thin films of Bi3.75La0.25Ti3O12 and Bi3La1Ti3O12. When comparing the two compounds, it is determined that the increase in lanthanum alters the positive acid character, thus reducing the dissolution of the oxides and increasing protection.

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Section: High-temperature Corrosionmentioning

confidence: 99%