Improvement in corrosion resistance of CrN coated stainless steel by conformal TiO2 deposition

Shan, Chongxin; Hou, Xianghui; Choy, Kwang‐Leong; Choquet, Patrick

doi:10.1016/j.surfcoat.2007.08.078

Cited by 61 publications

(53 citation statements)

References 27 publications

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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.…”

mentioning

confidence: 92%

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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mentioning

confidence: 92%

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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“…[14][15][16][17] In this study, a coating was formed by a first Al 2 O 3 layer, and a secondary TiO 2 coating was applied with the aim of using the Al 2 O 3 as an adhesion promoter and a highly resistive layer 18 and protecting its chemical integrity using the high stability and low wettability 19 of the amorphous TiO 2 second layer. The coating was deposited on two differently pre-treated AISI 316 stainless steel substrates to evaluate the effect of the industrial surface finishing on the coating adhesion and protection.…”

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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“…The polarization curves of potential versus current density of the CrN coated stainless steel before and after TiO 2 coatings and measured using a Solartron SI1287 Electrochemical Interface system in 3.0 wt.% NaCl solution are shown in Fig.2. The results indicated that the equilibrium corrosion potential of CrN coated stainless steel has been reduced from -0.74V to about -0.49V, and the corrosion current density has also been decreased from 1.9 x 10 -6 mA/cm 2 to 3.1 x 10 -7 mA/cm 2 after the deposition of TiO 2 films (6). These indicate that the presence of nano-thin TiO 2 film can help to ECS Transactions, 25 (4) 59-65 (2009) decrease the rate of corrosion of stainless steel (s.s) as well as CrN coated s.s..…”

Section: Multifunctional Protective Oxide Thin Filmsmentioning

confidence: 96%

“…AFM images of (a) as-received CrN coated stainless steel substrate (surface roughness, RMS 9.3), and (b) TiO 2 deposited onto CrN coated stainless steel, with a surface roughness, RMS 3.5(6).…”

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confidence: 99%

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Structures, Properties and Applications of Functional Thin Films by ALD

Choy

2009

ECS Trans.

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This paper gives a brief overview of the use of Atomic Layer Deposition (ALD) technique for the emerging and non mainstream semiconductor applications. These include a special focus on ALD fabrication of multifunctional protective oxide thin films, and textured thin films for electrical, optoelectronic devices, as well textured templates for the cost-effective growth of highly oriented nanowires for potential applications in light emitting diodes, field-effect transistor and catalysts with high activity and selectivity.

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Improvement in corrosion resistance of CrN coated stainless steel by conformal TiO2 deposition

Cited by 61 publications

References 27 publications

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

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

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

Structures, Properties and Applications of Functional Thin Films by ALD

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