Corrosion behavior of magnetron sputtered NbN and Nb1-xAlxN coatings on AISI 316L stainless steel

Fonseca, Rafaela Marinho; Soares, Renata Braga; Carvalho, Renata Gomes; Tentardini, E.K.; Lins, Vanessa de Freitas Cunha; Castro, M.M.R.

doi:10.1016/j.surfcoat.2019.124987

Cited by 26 publications

(17 citation statements)

References 49 publications

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“…The amorphous alloy is known to be a corrosion inhibitor, and often shows higher corrosion resistance than crystalline alloys at the same composition [ 28 , 29 , 30 , 31 ]. Furthermore, Nb nitride possesses good corrosion resistance even under aggressive environmental conditions, which have been widely studied for preventing metal corrosion [ 32 , 33 , 34 , 35 ]. Therefore, partial phase changes in the Nb layer might positively affect the corrosion behavior.…”

Section: Resultsmentioning

confidence: 99%

N+-Implantation on Nb Coating as Protective Layer for Metal Bipolar Plate in PEMFCs and Their Electrochemical Characteristics

et al. 2022

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Nitrogen ions were implanted into the coated Nb layer by plasma immersion ion implantation to improve resistance to corrosion of a metal bipolar plate. Due to nitrogen implantation, the corrosion behavior of the Nb layer was enhanced. The electron microscope observation reveals that the microstructure of the Nb layer became denser and had fewer defects with increasing implantation energy. As a result, the densified structure effectively prevented direct contact with the corrosive electrolyte. In addition, at a higher implantation rate (6.40 × 1017 N2/cm2), a thin amorphous layer was formed on the surface, and the implanted nitrogen ions reacted at neighboring Nb sites, resulting in the localized formation of nitrides. Such phase and structural changes contributed to further improve corrosion resistance. In particular, the implanted Nb layer at bias voltage of 10 kV exhibited a current density more than one order of magnitude smaller with a two times faster stabilization than the as-deposited Nb layer under the PEMFC operating conditions.

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Section: Resultsmentioning

confidence: 99%

N+-Implantation on Nb Coating as Protective Layer for Metal Bipolar Plate in PEMFCs and Their Electrochemical Characteristics

et al. 2022

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“…Coating compositions as a function of the power density applied at Al target given by EDX. previous works from the literature that equally describe columnar microstructures for NbN and AlN [2,9,12]. Film thickness, obtained through the verification of the cross-section by SEM, were 166 ± 1 nm for NbN, 170 ± 3 nm for Nb 0.90 Al 0.10 N, 181 ± 1 nm for Nb 0.80-Al 0.20 N and 199 ± 12 nm for Nb 0.60 Al 0.40 N. The higher the Al content, the greater the coatings' thickness, provided that the deposition parameters are maintained for all samples.…”

Section: Resultsmentioning

confidence: 99%

“…The addition of aluminium in MeN has been increasingly explored in the literature. Coatings composed of MeAlN have shown significant improvements in mechanical properties, oxidation, wear and corrosion resistance [5,[9][10][11][12][13][14][15]. This was attributed to an increase in film density and the formation of a passive layer composed of Al 2 O 3 , preventing electrolyte penetration [12].…”

Section: Introductionmentioning

confidence: 99%

“…Nonetheless, it suffers from low oxidation resistance [1,4,5]. The introduction of another element to the NbN structure, such as aluminium, could be an alternative to improve oxidation resistance, enabling usage in harsh environments such as those encountered during the operation of proton membrane fuel cells, marine turbines and in processes in the oil and gas industries [12].…”

Section: Introductionmentioning

confidence: 99%

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Corrosion resistance of NbN and Nb_xAl_yN coatings on stainless steel

Carvalho

Fonseca

Lins

et al. 2021

Surface Engineering

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Herein, the corrosion behaviour of coated 304 stainless steel in 3.5 wt-% NaCl solution was investigated. Thin films, composed of NbN and Nb x Al y N with different Al contents, were synthesized by magnetron sputtering. The microstructural investigation involved testing in energy-dispersive X-ray spectroscopy, scanning electron microscopy and grazing incidence X-ray diffraction, revealing films with a thickness of 165-200 nm composed of an NbN-δ cubic phase. Corrosion resistance was assessed by potentiodynamic polarization and electrochemical impedance spectroscopy tests. According to the present results, in the proposed the experimental conditions, the addition of Al to NbN coatings is detrimental to the corrosion resistance of coated 304 stainless steel. The Nb 0.90 Al 0.10 N sample shows the lowest corrosion protection and the highest porosity among the studied samples.

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“…In addition, there was an increase in pitting corrosion resistance being attributed to the presence of titanium. Fonseca et al [ 67 ] deposited NbN and Nb 1− x Al x N films on AISI 316L to evaluate the corrosion behavior and found improved corrosion resistance compared with the substrate without treatment. The study still pointed out that the Nb 2 O 5 and Al(OH) 3 compounds are the main responsible ones for superior corrosion properties.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Corrosion Resistance of Thin Films Formed on AISI 316L Steel by Plasma Using Hastelloy as Cathodic Cage

Monção

Júnior

Bandeira

et al. 2021

Physica Status Solidi (a)

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Herein, the use of Hastelloy C-276 as a cathodic cage for the deposition of thin films on the AISI 316L steel substrate by plasma is investigated. The films are processed through floating potential at 350, 375, 400, and 425 C for 4 h, using a hydrogen-nitrogen mixture in the proportion of 40% and 60%, respectively. The thin films are investigated by X-ray diffraction, scanning electron microscopy, Raman spectroscopy, and potentiodynamic polarization. The spectroscopy results point out the formation of different phases such as FeNi 3 , CrNi, and MoN 1/2 . Films acquired at 375 ºC present superior corrosion resistance with less negative corrosion potential (À0.020 V). The increase and decrease in FeNi 3 and CrNi contents follow the improvement of the applied temperature, which is unbeneficial to the corrosion resistance of the films.

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Corrosion behavior of magnetron sputtered NbN and Nb1-xAlxN coatings on AISI 316L stainless steel

Cited by 26 publications

References 49 publications

N+-Implantation on Nb Coating as Protective Layer for Metal Bipolar Plate in PEMFCs and Their Electrochemical Characteristics

N+-Implantation on Nb Coating as Protective Layer for Metal Bipolar Plate in PEMFCs and Their Electrochemical Characteristics

Corrosion resistance of NbN and Nb_xAl_yN coatings on stainless steel

Evaluation of Corrosion Resistance of Thin Films Formed on AISI 316L Steel by Plasma Using Hastelloy as Cathodic Cage

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Corrosion behavior of magnetron sputtered NbN and Nb1-xAlxN coatings on AISI 316L stainless steel

Cited by 26 publications

References 49 publications

N+-Implantation on Nb Coating as Protective Layer for Metal Bipolar Plate in PEMFCs and Their Electrochemical Characteristics

N+-Implantation on Nb Coating as Protective Layer for Metal Bipolar Plate in PEMFCs and Their Electrochemical Characteristics

Corrosion resistance of NbN and NbxAlyN coatings on stainless steel

Evaluation of Corrosion Resistance of Thin Films Formed on AISI 316L Steel by Plasma Using Hastelloy as Cathodic Cage

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Corrosion resistance of NbN and Nb_xAl_yN coatings on stainless steel