Coatings for tribocorrosion protection

Wood, R.J.K.; Wharton, J.A.

doi:10.1533/9780857093738.2.296

Cited by 23 publications

(12 citation statements)

References 79 publications

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“…Efforts have also been made in recent years to improve the tribological, corrosion, and tribocorrosion properties of biomedical alloys by surface engineering, mainly by applying an innovative surface coating [14][15][16] and by surface alloying [17][18][19]. In particular, the potential of S-phase coating and CrN coating to improve tribocorrosion behavior of biomedical alloys has been studied in details [20,21].…”

Section: Introductionmentioning

confidence: 99%

Tribocorrosion Behavior of Duplex S/Cr(N) and S/Cr(C) Coatings on CoCrMo Alloy in 0.89 % NaCl Solution

Sun

Dearnley

2014

J Bio Tribo Corros

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In the present study, magnetron sputtering was used to deposit two types of duplex coatings, S/Cr(N) and S/Cr(C), onto ASTM F75 CoCrMo cast alloy, aiming at improving the tribocorrosion behavior of the medical alloy. The duplex coatings were fabricated and structured such that the inner layer comprised carbon S phase with a CoCrMo matrix by sputtering a CoCrMo alloy target in the presence of carbon containing atmosphere. The duplex coatings were found to be elastically compatible with the CoCrMo alloy, and possess higher hardness and a larger hardness-to-modulus ratio than the uncoated alloy. Tribocorrosion tests were conducted in 0.89 % NaCl solution at 37°C under elastic contact and unidirectional sliding conditions. The results showed that the duplex S/Cr(N) coating was very effective in improving the tribocorrosion behavior of the alloy at all applied potentials, in terms of reduced friction and much improved resistance to total material loss (TML) by up to more than one order of magnitude. On the other hand, the duplex S/Cr(C) coating was effective only at open circuit and anodic potentials (APs), but not at cathodic potentials. The uncoated alloy exhibited low friction and low TML at a large cathodic potential and experienced peculiar frictional behavior at the tested AP. The results are discussed in terms of material transfer, hydrogen charging, third body effects, and synergism between wear and corrosion.

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Section: Introductionmentioning

confidence: 99%

Tribocorrosion Behavior of Duplex S/Cr(N) and S/Cr(C) Coatings on CoCrMo Alloy in 0.89 % NaCl Solution

Sun

Dearnley

2014

J Bio Tribo Corros

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“…Tribocorrosion is the process that leads to the degradation of a metallic and/or non-metallic material for the combined effect of the mechanical contact (sliding, friction, impact) with the corrosive action of the surrounding environment [4]. In order to increase tribocorrosion properties of metals a wide range of coatings have been developed, including those based on ceramics, polymers, and composites, as well as diamond-like carbon (DLC) thin films [5]. Among these, plasma electrolytic oxidation (PEO) seems one of the most promising in order to protect light alloys.…”

Section: Introductionmentioning

confidence: 99%

Tribocorrosion Properties of PEO Coatings Produced on AZ91 Magnesium Alloy with Silicate- or Phosphate-Based Electrolytes

Pezzato

Vranescu

Marco³

et al. 2018

Coatings

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In this work, the tribocorrosion behavior of plasma electrolytic oxidation (PEO)-coated AZ91 samples was studied. In particular, two different coatings were produced and compared. One was obtained with an alkaline electrolyte containing sodium phosphate, whereas the other one was produced with an alkaline electrolyte containing sodium silicate. The coatings were characterized with SEM-EDS and XRD techniques, and after the tribocorrosion tests, the wear scars were analyzed with SEM-EDS. The tribocorrosion behavior was evaluated measuring the OCP during a pin on disk test performed in an aggressive environment. Moreover, potentiodynamic polarization and electrochemical impedance spectroscopy tests were performed, to evaluate the corrosion resistance of the different samples in the absence of wear phenomena. The behavior of all the PEO-treated specimens was compared with the one of the untreated sample. A remarkable increase in the tribocorrosion performances after the PEO treatments was observed. Moreover, the samples obtained with the electrolyte containing silicates showed higher tribocorrosion performances.

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“…Thus, many efforts have been made in the past decade to investigate the tribocorrosion behavior of biomedical alloys in laboratory and simulator tests . One of the ways to improve the tribocorrosion properties of metallic alloys is by forming a barrier layer at the surface through surface engineering, in particular by applying hard and corrosion resistant coatings …”

Section: Introductionmentioning

confidence: 99%

“…[9][10][11][12] One of the ways to improve the tribocorrosion properties of metallic alloys is by forming a barrier layer at the surface through surface engineering, in particular by applying hard and corrosion resistant coatings. 13,14 Indeed, many efforts have been made to improve the tribocorrosion performance of biodemical alloys by surface coatings, including diamond-like carbon coatings, 15 ion implantation, 16 TiN and TiC based coatings, 17 CrN based coatings 18 and surface alloying. 19,20 In particular, detailed studies have been performed on the potential of S-phase coating and CrN coating to improve the tribocorrosion behavior of biomedical alloys.…”

Section: Introductionmentioning

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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Coatings for tribocorrosion protection

Cited by 23 publications

References 79 publications

Tribocorrosion Behavior of Duplex S/Cr(N) and S/Cr(C) Coatings on CoCrMo Alloy in 0.89 % NaCl Solution

Tribocorrosion Behavior of Duplex S/Cr(N) and S/Cr(C) Coatings on CoCrMo Alloy in 0.89 % NaCl Solution

Tribocorrosion Properties of PEO Coatings Produced on AZ91 Magnesium Alloy with Silicate- or Phosphate-Based Electrolytes

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

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