Chemical and electrochemical characterization of hybrid PVD+ALD hard coatings on tool steel

Marin, Elia; Guzmàn, L.; Lanzutti, A.; Fedrizzi, L.; Saikkonen, M.

doi:10.1016/j.elecom.2009.08.052

Cited by 62 publications

(57 citation statements)

References 4 publications

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“…The sharp increase of current density near +1200 mV SCE is probably due to the oxygen evolution reaction. While some authors [5,43] reported that TiCN films are effective to enhance the corrosion properties of metallic substrates, Marin et al [44] have also found that PVD TiCN films did not improve the corrosion resistance of a high speed steel. The coating morphology is the key factor that leads to a desirable corrosion resistance improvement or a deleterious poorly protective situation.…”

Section: Tablementioning

confidence: 97%

Study of the corrosion resistance and in vitro biocompatibility of PVD TiCN-coated AISI 316 L austenitic stainless steel for orthopedic applications

Antunes

Rodas

Lima

et al. 2010

Surface and Coatings Technology

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The aim of the present work was to study the corrosion resistance in Hanks' solution and the in vitro biocompatibility of a TiCN-coated AISI 316 L stainless steel. The electrochemical behavior was assessed using potentiodynamic polarization and electrochemical impedance spectroscopy. Cytotoxicity and genotoxicity tests were performed to evaluate the potential biocompatibility of the specimens. TiCN morphology was investigated using scanning electron microscopy (SEM). Bare 316 L specimens were also evaluated for comparison. The results showed that the film morphology strongly influences the electrochemical behavior of the coated underlying metal. TiCN-coated specimens presented neither cytotoxicity nor genotoxicity.

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Section: Tablementioning

confidence: 97%

Study of the corrosion resistance and in vitro biocompatibility of PVD TiCN-coated AISI 316 L austenitic stainless steel for orthopedic applications

Antunes

Rodas

Lima

et al. 2010

Surface and Coatings Technology

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“…ALD is a very innovative technology which provides the ability to obtain very thin, almost defect-free nanometric coatings on the surface of different materials, from polymers to ceramics or metals. 12,13 In ALD, each deposition cycle is clearly divided into four steps: first, a precursor is injected in the deposition chamber. The precursor is chosen so that it cannot react with itself, and so a single monolayer is formed as a result of its reaction with the substrate.…”

Section: Introductionmentioning

confidence: 99%

Corrosion protection of AISI 316 stainless steel by ALD alumina/titania nanometric coatings

et al. 2011

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Stainless steels are used today in a wide range of applications as a result of their combination of high corrosion resistance and good mechanical properties. In some applications, for example, temporary contact biomedical devices or solar water heaters, corrosion resistance may need further improvement, and surface coatings may be applied for enhanced protection. In this study, AISI 316 stainless steel samples with two different standard industrial finishes were coated using atomic layer deposition (ALD) of Al 2 O 3 /TiO 2 layers. The morphology, composition and corrosion protection was then investigated using different techniques. Atomic force microscopy (AFM) and scanning electron microscopy (SEM) were used to obtain a morphological characterization of coatings and substrates. Glow discharge optical emission spectrometry (GDOES) was used to obtain an in-depth profile of composition. Polarization curves in a 0.2 M NaCl solution were used to evaluate the corrosion protection given by the coatings. The deposited ALD layers were found to be almost flawless. The measured RMS roughness values were compared before and after the ALD, and were around 50 and 370 nm for the two samples. GDOES profiles were strongly influenced by the roughness of the substrate. The corrosion protection obtained on AISI 316 stainless steel by the application of nanometric coatings proved to be very effective in reducing the passive region current density from 10 À7 to less than 10 À9 A/cm 2 and increasing the passive region potential interval from 0.8 to 1.3 V before breakdown.

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“…ALD TiO 2 and Al 2 O 3 films have also been applied on PVD coatings to block pinholes and other defects left in the structure. 20,21 Polarization experiments in both papers showed an increase of corrosion potential and one order of magnitude decrease of corrosion current density implying reduction of both corrosion probability and corrosion rate. Similar corrosion potential increase and current density decrease as on PVD coatings were also obtained with bare ALD 50 nm TiO 2 coatings on stainless steel.…”

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confidence: 96%

Corrosion Protection of Steel with Oxide Nanolaminates Grown by Atomic Layer Deposition

Härkönen

Díaz

Światowska

et al. 2011

J. Electrochem. Soc.

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Atomic layer deposited (ALD) aluminum and tantalum oxide (Al 2 O 3 and Ta 2 O 5 ) and their nanolaminates were applied as corrosion protection coatings on AISI 52100 steel. The aim was to combine the good sealing properties of Al 2 O 3 with the chemical stability of Ta 2 O 5 and to optimize the coating architecture in order to obtain the best possible long-term durability. Coating composition and morphology were studied with time-of-flight elastic recoil detection analysis (ToF-ERDA), time-of-flight secondary ion mass spectrometry (ToF-SIMS) and field emission scanning electron microscopy (FESEM) and energy dispersive x-ray spectrometry (EDS). Electrochemical properties were studied with voltammetry and electrochemical impedance spectroscopy (EIS), and corrosion durability with neutral salt spray (NSS) testing. The coatings were observed to be conformal and uniform over rough surfaces, and contained some carbon and hydrogen as impurities. The electrochemical results showed that the Al 2 O 3 coating had superior sealing properties compared to the Ta 2 O 5 coating, and nanolaminates had properties in between those of Al 2 O 3 and Ta 2 O 5 . However, in the NSS test the laminate-coated samples survived the best demonstrating long-term durability. Analysis of the laminate structure showed that for 40 and 80 nm laminates the best protection was achieved with 10 and 20 nm layers, respectively.

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Chemical and electrochemical characterization of hybrid PVD+ALD hard coatings on tool steel

Cited by 62 publications

References 4 publications

Study of the corrosion resistance and in vitro biocompatibility of PVD TiCN-coated AISI 316 L austenitic stainless steel for orthopedic applications

Study of the corrosion resistance and in vitro biocompatibility of PVD TiCN-coated AISI 316 L austenitic stainless steel for orthopedic applications

Corrosion protection of AISI 316 stainless steel by ALD alumina/titania nanometric coatings

Corrosion Protection of Steel with Oxide Nanolaminates Grown by Atomic Layer Deposition

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