Electrochemical investigation of chromium nanocarbide coated Ti–6Al–4V and Co–Cr–Mo alloy substrates

Swaminathan, Viswanathan; Zeng, Haitong; Lawrynowicz, D.E.; Zhang, Zhongtao; Gilbert, Jeremy L.

doi:10.1016/j.electacta.2011.10.085

Cited by 10 publications

(8 citation statements)

References 31 publications

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“…The corrosion current density is representative for the degradation degree of the alloy. The corrosion current (i corr ) for uncoated Ti6Al4V alloy was significantly lower than that of uncoated CoCrMo alloy as shown in work of V. Swaminathan et al [20].…”

Section: Electrochemical Test By Tafel Analysismentioning

confidence: 98%

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Sputtered nanocrystalline ceramic TiC/amorphous C thin films as potential materials for medical applications

Oláh

Fogarassy

Furkó

et al. 2015

Ceramics International

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The relationship between structural behaviour of sputtered TiC / amorphous C (TiC /a:C) thin films and corrosion properties was measured in three various pH solutions (0.5 M NaCl (pH=6); 0.1 M HCl (pH=1); 0.1 M NaOH (pH=13). The ~ 400 nm thick nanocomposites were deposited by DC magnetron sputtering on different substrates (Ti6Al4V alloy and CoCrMo alloy) in argon at 25 C° and 0.25 Pa with 150 W input power of carbon target and 50 W input power of titanium target. The structure and composition of nanocomposites were investigated by Transmission and Scanning Electron Microscopy. In both samples the structural investigations confirmed columnar structure of TiC /a:C films with 25-50 nm sized cubic TiC. These columns were separated by 2 -3 nm thin amorphous carbon layers. TiC /a:C /Ti6Al4V alloy implant material showed better corrosion resistance than the TiC /a:C /CoCrMo alloy in 0.5 M NaCl solution based on results of the Electrochemical Impedance Spectroscopy. For both samples, the 0.1 M NaOH solution was the most corrosive media.

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Section: Electrochemical Test By Tafel Analysismentioning

confidence: 98%

“…The corrosion behaviour can be studied by potentiodynamic measurements and by Electrochemical Impedance Spectroscopy (EIS). EIS is a non-destructive and also one of the most appropriate techniques to characterize the corrosion behaviour of our materials [20].…”

mentioning

confidence: 99%

Sputtered nanocrystalline ceramic TiC/amorphous C thin films as potential materials for medical applications

Oláh

Fogarassy

Furkó

et al. 2015

Ceramics International

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“…All corrosion and tribocorrosion tests here were conducted at 378C in physiological saline (0.89% NaCl) solution, which is often chosen as baseline medium for testing coated metal implant alloys, to represent the salinity level found in the human body. [28][29][30] It is recognised that saline-bovine serum solutions can also be used since these are widely used in human joint simulator tests 14 due to their ability to reproduce the lower friction levels found in human joints. However, for the purposes of achieving a first-level ranking of coated biomedical metals, physiological saline is a pragmatic choice.…”

Section: Methodsmentioning

confidence: 99%

Response of duplex Cr(N)/S and Cr(C)/S coatings on 316L stainless steel to tribocorrosion in 0.89% NaCl solution under plastic contact conditions

2016

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Two duplex coatings, Cr(N)/S and Cr(C)/S, were deposited on 316L stainless steel by magnetron sputtering. The effectiveness of these duplex coatings in improving the tribocorrosion behaviour of medical alloys under elastic contact conditions has been demonstrated in a recent publication. The present work focused on the response of these duplex coatings to tribocorrosion under plastic contact conditions. Tribocorrosion tests were conducted in 0.89 % NaCl solution at 37 o C at an initial contact pressure of 740 MPa and under unidirectional sliding conditions for sliding duration up to 24 h. The results showed that during sliding in the corrosive solution, the duplex coatings were plastically deformed into the substrate to a depth about 1 m. The Cr(C)/S duplex coating had sufficient ductility to accommodate the deformation without cracking, such that it was worn through gradually, leading to the gradual increase in open circuit potential (OCP) and coefficient of friction (COF). On the other hand, the Cr(N)/S duplex coating suffered from cracking at all tested potentials, leading to coating blistering after prolonged sliding at OCP and stable pit formation in the substrate beneath the coating at applied anodic potentials.

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“…The corrosion potential exhibited negative shift relative to the open-circuit potential because of the change in distribution of the surface oxides, which was due to cathodic polarization of alloys which changed the status of compounds. 22 …”

Section: Galvanic Currentmentioning

confidence: 97%

Galvanic corrosion behavior between Ti6Al4V and CoCrMo alloys in saline solution

Geng¹,

Zhang²,

Chen³

et al. 2014

Mat Express

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The galvanic corrosion behaviours of two commonly used metallic materials used in artificial joints in saline solution are investigated. Electrochemical testing techniques such as open-circuit potential (OCP), galvanic current (I g ), dynamic polarisation curves and electrochemical impendence spectroscopy are used to evaluate the corrosion properties of the alloys under various immersion times. The following results are obtained: the galvanic current increases with increased immersion time; compared with static corrosion, the corrosion potential (E corr ) and corrosion current density (I corr ) of coupled Ti6Al4V alloys display inconspicuous changes, whereas the corrosion potential of CoCrMo alloys significantly decreases; corrosion current density and corrosion rate (CR) increase by at least two orders of magnitude; corrosion current density increases from 5.8397 × 10 −9 Amp/cm 2 to 5.1889 × 10 −7 Amp/cm 2 ; the corrosion rate increases from 6.8687 × 10 −5 mm/a to 6.1033 × 10 −3 mm/a; the electrochemical impendence of coupled CoCrMo alloy shows significant change because of anodic dissolution where the passive film does not easily form and stabilize. Although the galvanic current of the coupled alloys is found at a lower order of magnitude (3.8 × 10 −8 A to 7 × 10 −8 A) during the test period, the galvanic corrosion between Ti6Al4V and CoCrMo alloys significantly affects the electrochemical impendence of CoCrMo alloys.

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Electrochemical investigation of chromium nanocarbide coated Ti–6Al–4V and Co–Cr–Mo alloy substrates

Cited by 10 publications

References 31 publications

Sputtered nanocrystalline ceramic TiC/amorphous C thin films as potential materials for medical applications

Sputtered nanocrystalline ceramic TiC/amorphous C thin films as potential materials for medical applications

Response of duplex Cr(N)/S and Cr(C)/S coatings on 316L stainless steel to tribocorrosion in 0.89% NaCl solution under plastic contact conditions

Galvanic corrosion behavior between Ti6Al4V and CoCrMo alloys in saline solution

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