Plasma Nitriding and DLC Coatings for Corrosion Protection of Precipitation Hardening Stainless Steel

Dalibón, Eugenia L.; Guitar, María Agustina; Trava-Airoldi, V.J.; Mücklich, Frank; Brühl, Sonia Patricia

doi:10.1002/adem.201500411

Cited by 12 publications

(3 citation statements)

References 31 publications

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“…Figure 13 shows a schematic illustration for the corrosion behavior of multilayered film in NaCl solution. In general, DLC film may always have some defects such as pinholes or microcracks that allow the corrosive medium such as Cl − to diffuse in the film, where a localized galvanic corrosion can preferably occur and then expand and delaminate the film [42,43]. In case of multilayered DLC films, the improvement of corrosion resistance is attributed to the local coverage of defects like pinholes by an increasing number of Si-DLC layers and make the electrolyte encounter a more tortuous path in traversing the films.…”

Section: Discussion Of High Corrosion Resistancementioning

confidence: 99%

Corrosion and wear behaviors of Si-DLC films coated on inner surface of SS304 pipes by hollow cathode PECVD

Zhang

et al. 2018

Surf. Topogr.: Metrol. Prop.

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An integrated technology of hollow cathode plasma enhanced chemical vapor deposition (PECVD) with plasma immersion ion deposition (PIID), promoting the deposition rate ranging from10 to 14 µm h −1 , was developed to deposit thick Si-doped diamond-like carbon (Si-DLC) films on the internal surface of 304 stainless steel (SS304) pipes with various inner diameters for corrosion and abrasion protection. After the deposition, the films inside 30 mm and 90 mm diameter pipe have been comprehensively investigated by FESEM, optical 3D profiler, Raman, XPS, nanoindentation, EIS and polarization measurements, salt spray test and friction test. It was found that Si-DLC films were compact and smooth, thick (~11 µm) and hard (~13 GPa). The current density ( 2.38 × 10 −9 A cm −2 ) of Si-DLC films was 1000 times lower than the uncoated steel pipe through the electrochemical polarization test. The EIS data were analyzed by an equivalent circuit model, which presented a highest charge transfer impedance of ~4.5E7 Ω cm 2 . Si-DLC films survived 720 h salt spray test without the presence of corrosion pits and exfoliation. The test results confirmed that Si-DLC films possessed superior performances in corrosion resistance, which was not only attributed to the chemical inertness of DLC and Si incorporation, but also to the multilayered film with few defects. Besides, the friction coefficient of Si-DLC films in air, water and oil environments was low at 0.05-0.06, 0.08-0.12 and 0.08-0.09, respectively, in comparison with 0.55, 0.30 and 0.11 for bare steel. The corresponding wear rates of Si-DLC films were much lower than uncoated steel pipe in the three environments as well.

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Section: Discussion Of High Corrosion Resistancementioning

confidence: 99%

Corrosion and wear behaviors of Si-DLC films coated on inner surface of SS304 pipes by hollow cathode PECVD

Zhang

et al. 2018

Surf. Topogr.: Metrol. Prop.

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“…Corrosion behaviours of DLC coatings on nitrided steel substrates have been investigated in few studies [11, 18, 19]. Jellesen et al [18] have shown that corrosion resistance of low‐temperature plasma nitrided SS could be improved after applying a DLC thin film.…”

Section: Introductionmentioning

confidence: 99%

“…Azzi et al [11] investigated the improvement of the corrosion resistance of DLC thin films on plasma nitrided 316L SS with increasing breakdown potential ( E bd ) and decreasing corrosion current. In the most recent study, Dalibón et al [19] have reported that the corrosion resistance of plasma nitrided Corrax SS could be improved by DLC thin films with increasing E bd , but there was no significant effect on the reduction of corrosion current density.…”

Section: Introductionmentioning

confidence: 99%

Improved electrochemical performance of nitrocarburised stainless steel by hydrogenated amorphous carbon thin films for bone tissue engineering

Derakhshandeh¹,

Hadavi²,

Eshraghi³

et al. 2017

IET nanobiotechnol.

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In this study, hydrogenated amorphous carbon thin films, structurally similar to diamond-like carbon (DLC), were deposited on the surface of untreated and plasma nitrocarburised (Nitrocarburizing-treated) stainless steel medical implants using a plasma-enhanced chemical vapour deposition method. The deposited DLC thin films on the nitrocarburising-treated implants (CN+DLC) exhibited an appropriate adhesion to the substrates. The results clearly indicated that the applied DLC thin films showed excellent pitting and corrosion resistance with no considerable damage on the surface in comparison with the other samples. The CN+DLC thin films could be considered as an efficient approach for improving the biocompatibility and chemical inertness of metallic implants.

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Effect of martensite transformation on chemical composition, semiconductor property and corrosion resistance of passive film on SAE 304 stainless steel

Liu

Jiang

2018

Materialwissenschaft Werkst

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The chemical composition, semiconductor property and corrosion resistance of passive films on cold-worked 304 stainless steel containing varying amounts of martensite (0 %, 0.6 %, 6 %, 12 % and 20 %) are investigated using X-ray photoelectron spectroscopy, Mott-Schottky analyses and electrochemical impedance spectroscopy. The results indicate that after cold rolling, the microstructure in the sample transforms from single austenite into compound of martensite and original austenite. For the martensite content of 6 %, the passive film formed on the sample contains the least amount of oxide and shows the highest acceptor and donor densities; according to the inverse relationship between corrosion resistance and both acceptor and donor density, these results indicate that the passive film shows the poorest corrosion resistance among all the samples measured. When the content of martensite decrease below 6 %, the acceptor and donor densities for the passive film increase with increasing martensite content; however, for samples with the martensite content higher than 6 %, the acceptor and donor densities decrease with increasing martensite content. The oxide content and corrosion resistance show the opposite behavior with increasing martensite content: the monotonic decrease for martensite content lower than 6 % and gradual increase when the martensite content exceeds 6 %.

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Plasma Nitriding and DLC Coatings for Corrosion Protection of Precipitation Hardening Stainless Steel

Cited by 12 publications

References 31 publications

Corrosion and wear behaviors of Si-DLC films coated on inner surface of SS304 pipes by hollow cathode PECVD

Corrosion and wear behaviors of Si-DLC films coated on inner surface of SS304 pipes by hollow cathode PECVD

Improved electrochemical performance of nitrocarburised stainless steel by hydrogenated amorphous carbon thin films for bone tissue engineering

Effect of martensite transformation on chemical composition, semiconductor property and corrosion resistance of passive film on SAE 304 stainless steel

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