Corrosion behavior of niobium coated 304 stainless steel in acid solution

Pan, T.J.; Chen, Y.; Zhang, B.; Hu, Jing; Li, C.

doi:10.1016/j.apsusc.2016.02.088

Cited by 35 publications

(12 citation statements)

References 20 publications

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“…According to the Pourbaix diagrams for the Ta-H 2 O and Nb-H 2 O [ 29 , 30 ], in aqueous sulphuric acid solution at 25 °C at pH value > 0.5, Ta and Nb are oxidized to Ta 2 O 5 and Nb 2 O 5 ; therefore, the formation of passive oxide layers prevents further oxidation of metals when they are under positive potential [ 31 , 32 ].…”

Section: Resultsmentioning

confidence: 99%

Experimental and Theoretical Studies on Corrosion Inhibition of Niobium and Tantalum Surfaces by Carboxylated Graphene Oxide

Mehmeti

Podvorica

2018

Materials

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The corrosion of two different metals, niobium and tantalum, in aqueous sulfuric acid solution has been studied in the presence and absence of carboxylated graphene oxide. Potentiodynamic measurements indicate that this nanomaterial inhibits corrosion due to its adsorption on the metal surfaces. The adsorbed layer of carboxylated graphene hinders two electrochemical reactions: the oxidation of the metal and the transport of metal ions from the metal to the solution but also hydrogen evolution reaction by acting as a protective barrier. The adsorption behavior at the molecular level of the carboxylated graphene oxide with respect to Nb, NbO, Ta, and TaO (111) surfaces is also investigated using Molecular Dynamic and Monte Carlo calculations.

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Section: Resultsmentioning

confidence: 99%

Experimental and Theoretical Studies on Corrosion Inhibition of Niobium and Tantalum Surfaces by Carboxylated Graphene Oxide

Mehmeti

Podvorica

2018

Materials

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“…Observed by the Nyquist and Bode plots presented in Figure 6, all the impedance data fit well with the applied electric equivalent circuit presented in Figure 7. Furthermore, this equivalent circuit model had been employed in previous research to fit the impedance spectra of the Nb coating in an acidic environment [13]. The passive film developed on the specimens is considered as defective layer, including a porous outer layer and a dense barrier layer.…”

Section: Electrochemical Impedance Spectroscopymentioning

confidence: 99%

“…Regarding the fabrication of Nb coatings, many deposition methods have been proposed, including electrodeposition [9], physical vapor deposition (PVD) [10,11], ion-beam assisted deposition (IBAD) [12], and high energy micro arc alloying technique (HEMAA) [13]. Unfortunately, Nb coatings deposited by electrodeposition, PVD and IBAD are only a few microns thick, which is too thin to provide effective surface protection during the long-term service of implants.…”

Section: Introductionmentioning

confidence: 99%

“…Though HEMAA was applied to make dense and thicker Nb coatings of approximately 20 µm, the adhesive strength between the coatings and substrate was poor. This impairs the durability of Nb as a protective coating when exposed in the acid solution for a long time [13]. As a result, only a few studies have thus far been conducted on the application of niobium coatings despite their outstanding performance.…”

Section: Introductionmentioning

confidence: 99%

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Electrochemical Properties of Niobium Coating for Biomedical Application

Shi

Zhang

et al. 2019

Coatings

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The preparation of the Nb coating was performed on the bare Ti–6Al–4V alloy using the double glow discharge plasma technique. It was characterized that the Nb coating exhibited a face centered cubic (fcc) crystal structure and a pronounced (200) preferred orientation. The SEM micrograph of the cross section for the coating displayed dense microstructure with a thickness of approximately 18 µm. The critical load (Lc) of the coating was determined to be about 83.5 N by the scratch tests. The electrochemical corrosion resistance of the coating was examined in Ringer’s solution at 37 °C by a series of electrochemical techniques, including open-circuit potential (OCP), potentiodynamic polarization, electrochemical impedance spectroscopy (EIS), and a Mott–Schottky analysis. As the result of the potentiodynamic polarization, the Nb coating possessed a more positive corrosion potential and lower corrosion current density than the Ti–6Al–4V substrate. EIS fitting date showed that the Nb coating always possessed a higher value of impedance and lower effective capacitance than those of the substrate during the five days of immersion testing. The main component of the passive film developed on the Nb coating was Nb2O5, confirmed by an X-ray photoelectron spectroscopy (XPS) analysis. A Mott–Schottky analysis demonstrated typical n-type semiconductor characteristics of the Nb coating, and both the donor density and flat band potential of the coating were lower than those of the substrate at all the given formation potential. These investigations demonstrate that the Nb coating can significantly improve the corrosion protection of uncoated Ti–6Al–4V and is thus a promising coating for the surface protection of bioimplants.

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“…The authors of [5][6][7][8] performed a qualitative analysis of the efficiency of coating deposition across different methods. The respective criteria were divided into three groups: possibilities of obtaining and controlling the process parameters, providing quality parameters, and technological and cost indices.…”

Section: Introductionmentioning

confidence: 99%

Superconducting Niobium Coatings Deposited on Spherical Substrates in Molten Salts

Dubrovskiy¹,

Okunev²,

Макарова³

et al. 2018

Coatings

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Abstract:The interaction of substrates from ceramics, beryllium, and carbopyroceram with the electrolyte for the electrodeposition of niobium coatings was investigated. The corrosion resistance of spherical ceramic and beryllium samples with the protective molybdenum films obtained by magnetron sputtering was studied. The exfoliation of molybdenum film from ceramics and beryllium samples was observed after the experiments due to the interaction of substrates with the melt. It was found that the carbopyroceram did not corrode in the niobium containing melt and this material was chosen as the substrate for the electrodeposition of superconducting niobium coatings. The influence of the oxide ions on the electrochemical behavior of niobium complexes in the NaCl-KCl-NaF-K 2 NbF 7 melt was studied. A special form of the cathode was constructed for the electrodeposition of niobium coatings on spherically shaped substrates. Electrodeposition of the niobium coatings on spheres 10 mm in diameter manufactured from carbopyroceram was carried out at 750 • C with the cathodic current density of 5 × 10 −3 -2 × 10 −2 A·cm −2 and the electrolysis time of 8-12 h. Influence of the cathodic current density on the microstructure of niobium coatings was studied. The roughness, nonsphericity, and superconductive properties of niobium coatings were determined.

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Corrosion behavior of niobium coated 304 stainless steel in acid solution

Cited by 35 publications

References 20 publications

Experimental and Theoretical Studies on Corrosion Inhibition of Niobium and Tantalum Surfaces by Carboxylated Graphene Oxide

Experimental and Theoretical Studies on Corrosion Inhibition of Niobium and Tantalum Surfaces by Carboxylated Graphene Oxide

Electrochemical Properties of Niobium Coating for Biomedical Application

Superconducting Niobium Coatings Deposited on Spherical Substrates in Molten Salts

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