High corrosion resistance of austenitic stainless steel alloyed with nitrogen in an acid solution

Metikoš‐Huković, Mirjana; Babić, Ranko; Grubač, Zoran; Petrović, Željka; Lajci, Nushe

doi:10.1016/j.corsci.2011.02.039

Cited by 92 publications

(60 citation statements)

References 48 publications

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“…The circulation of cathodic current induces a pH shift towards alkaline values which promotes the growth of calcareous deposits [5,15,22] and enhances the repair of the reduced oxide film on the surface [41][42][43].…”

Section: Discussionmentioning

confidence: 99%

“…The fast decrease of Rct at the first stage may be related to the degradation of the oxide film on the surface of 304 SS with cathodic polarization at −0.80 V [41]. The following increase of Rct gradually may be attributed to the repair of the passive film because of the alkaline environment formed due to cathodic polarization [42,43]. At the first stage before the 10-h polarization, Figure 4a is considered to be suitable for representing the electrode processes, which are dominated by the corrosion reaction of metal and the effect of passive film [30,39,40].…”

Section: Eis Evolution Of 304 Ss Withmentioning

confidence: 99%

Section: Eis Evolution Of 304 Ss Withmentioning

confidence: 99%

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Evolution of Calcareous Deposits and Passive Film on 304 Stainless Steel with Cathodic Polarization in Sea Water

Sun

Huang

et al. 2018

Coatings

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Abstract:The change of protective current density, the formation and growth of calcareous deposits, and the evolution of passive film on 304 stainless steel (SS) were investigated at different potentials of cathodic polarization in sea water. Potentiostatic polarization, electrochemical impedance spectroscopy (EIS), and surface analysis techniques of scanning electron microscopy (SEM), energy dispersive X-ray (EDX) microanalysis and X-ray diffraction (XRD) were used to characterize the surface conditions. It was found that the protective current density was smaller for keeping polarization at −0.80 V (vs. saturated calomel electrode (SCE), same as below) than that at −0.65 V. The calcareous deposits could not be formed on 304 SS with polarization at −0.50 V while it was well protected. The formation rate, the morphology, and the constituent of the calcareous deposits depended on the applied potential. The resistance of passive film on 304 SS decreased at the first stage and then increased when polarized at −0.80 V and −0.65 V, which was related to the reduction and the repair of passive film. For the stainless steel polarized at −0.50 V, the film resistance increased with polarization time, indicating that the growth of oxide film was promoted.

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Section: Discussionmentioning

confidence: 99%

Section: Eis Evolution Of 304 Ss Withmentioning

confidence: 99%

Section: Eis Evolution Of 304 Ss Withmentioning

confidence: 99%

See 1 more Smart Citation

Evolution of Calcareous Deposits and Passive Film on 304 Stainless Steel with Cathodic Polarization in Sea Water

Sun

Huang

et al. 2018

Coatings

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“…For stainless steels, possible donors in the oxide structure are mainly cation interstitials, such as Fe 2+ metal ions, and oxygen vacancies [46,56,57]. values when the temperature of film formation increased [60].…”

Section: Capacitance Measurementsmentioning

confidence: 99%

“…Additionally, the CPE of each subcircuit has been converted into a pure capacitance (C) using equations 2 [38,39] and 3 [40,41].…”

Section: Eis Measurementsmentioning

confidence: 99%

Characterization of thermal oxide films formed on a duplex stainless steel by means of confocal-Raman microscopy and electrochemical techniques

2015

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ElsevierSánchez Tovar, R.; Leiva García, R.; García Antón, J. (2015). Characterization of thermal oxide films formed on a duplex stainless steel by means of confocal-Raman microscopy and electrochemical techniques. Thin Solid Films. 576:1-10. doi:10.1016/j.tsf.2014.12.024. Regarding the electrochemical properties of these films, the corrosion resistance of the film tends to be lower with the heat treatment temperature, probably due to a more porous and heterogeneous scale. Mott Schottky plots show the n-type semiconductive behaviour of the films with donor densities that decrease with the enhancement of the temperature.

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Titanium Nitride Polyaniline Bilayer Coating for Metallic Bipolar Plates used in Polymer Electrolyte Fuel Cells

Cooper

2020

Fuel Cells

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Two materials, polyaniline (PANI) and titanium nitride (TiN), used for bipolar plate (BPP) coatings have each shown promise in improving the corrosion resistance and contact resistance, respectively, of metallic bipolar plates. Polyaniline was shown to provide a barrier for the bipolar plate and to effectively lower the corrosion currents observed in ex situ corrosion tests. However, the interfacial contact resistance (ICR) between polyaniline coatings and gas diffusion layer (GDL) is high and results in high electrical losses. On the other hand, TiN is reported to achieve good conductivity and in some cases improved corrosion resistance. The two materials have also been investigated together in a composite coating and showed promising results, but the contact resistance of the coating was still too high for use in a commercial fuel cell. In this study, the application of an additional layer of TiN over the TiN‐polyaniline composite coating (a bilayer coating) is investigated. Composite bilayered PANI TiN coatings were deposited upon SS316L substrates. The optimized coating achieved U.S. Department of Energy (DoE) targets with potentiostatic corrosion currents of ∼0.024 μA cm−2 and ICR values of 11.2 mΩ cm2. PANI polymerization was confirmed, using Fourier‐transform infrared (FTIR) spectroscopy and TiN loadings were investigated with energy dispersive X‐ray (EDX) spectroscopy .

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High corrosion resistance of austenitic stainless steel alloyed with nitrogen in an acid solution

Cited by 92 publications

References 48 publications

Evolution of Calcareous Deposits and Passive Film on 304 Stainless Steel with Cathodic Polarization in Sea Water

Evolution of Calcareous Deposits and Passive Film on 304 Stainless Steel with Cathodic Polarization in Sea Water

Characterization of thermal oxide films formed on a duplex stainless steel by means of confocal-Raman microscopy and electrochemical techniques

Titanium Nitride Polyaniline Bilayer Coating for Metallic Bipolar Plates used in Polymer Electrolyte Fuel Cells

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