Electrochemical corrosion and metal ion release from Co-Cr-Mo prosthesis with titanium plasma spray coating

Reclaru, Lucien; Eschler, P.-Y.; Lerf, R.; Blatter, A.

doi:10.1016/j.biomaterials.2005.01.004

Cited by 70 publications

(42 citation statements)

References 25 publications

(21 reference statements)

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“…6. As is well known, the value of E OCP depends upon the experimental conditions, including the composition, temperature and oxygen content of electrolyte, and also on the surface state of the specimen [37]. As can be seen from Fig.…”

Section: Phase Analysis and Nanoindentation Testingmentioning

confidence: 79%

Corrosion behavior of a ZrCN coated Ti alloy with potential application as a bipolar plate for proton exchange membrane fuel cell

Huang

et al. 2016

Journal of Alloys and Compounds

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a b s t r a c tTo improve the corrosion resistance, surface electrical conductivity and wettability of Tie6Ale4V used in polymer electrolyte membrane fuel cell (PEMFC), a ZrCN nanocrystalline coating was deposited on Ti e6Ale4V substrate using double cathode glow discharge technique. The new coating exhibited a nanocomposite structure, consisting of amorphous C, CN x and nanocrystalline ZrCN. The effect of the HF concentrations on the corrosion behavior of the coating was investigated by potentiodynamic, potentiostatic polarizations and electrochemical impedance spectroscopy (EIS) in a simulated the operating conditions of a PEMFC. With increasing HF concentrations, the corrosion potential (E corr ) decreased and the corrosion current density (i corr ) of the ZrCN coating increased, indicating that corrosion resistance decreased with the increase of HF concentrations. However, at any given concentration of HF, the corrosion resistance of the ZrCN coating was significantly higher than that of uncoated Tie6Ale4V. The results of EIS measurements showed that with increasing the concentration of HF, the resistance of the passive film (R b ) formed on the ZrCN coating decreased slightly, being of the order of magnitude of 10 7 U cm 2 , which was an improvement by four orders of magnitude compared to uncoated Ti-6A1-4V. At a compaction force of 140 N cm À2 , no perceptible difference in the interfacial contact resistance (ICR)of ZrCN-coated Ti-6A1-4V was observed before and after potentiostatic polarization for 120 min, and its ICR values were reduced by one order of magnitude in comparison to that of uncoated Ti-6A1-4V. Moreover, ZrCN-coated Ti-6A1-4V exhibited a much low surface wettability than uncoated Tie6Ale4V alloy, which was beneficial for both water management and improving corrosion resistance.

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Section: Phase Analysis and Nanoindentation Testingmentioning

confidence: 79%

Corrosion behavior of a ZrCN coated Ti alloy with potential application as a bipolar plate for proton exchange membrane fuel cell

Huang

et al. 2016

Journal of Alloys and Compounds

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“…Hydroxyapatite coating was also reported to decrease the metal ion release (Browne, 2000). On the other hand significant improvement was also reported by Ti coating on Co base alloy using plasma spraying method (Reclarua, 2005). One point to be noted here is the morphology and surface roughness of the coating layer also determine the corrosion resistance and in turn the metal ion release behavior.…”

Section: Metal Ions Releasementioning

confidence: 79%

Metals for Biomedical Applications

Hermawan¹,

Ramdan²,

Djuansjah³

2011

Biomedical Engineering - From Theory to Applications

173

144

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Biomedical Engineering -From Theory to Applications 412 visible under X-ray imaging. Most of artificial implants are subjected to loads, either static or repetitive, and this condition requires an excellent combination of strength and ductility. This is the superior characteristic of metals over polymers and ceramics. Specific requirements of metals depend on the specific implant applications. Stents and stent grafts are implanted to open stenotic blood vessels; therefore, it requires plasticity for expansion and rigidity to maintain dilatation. For orthopaedic implants, metals are required to have excellent toughness, elasticity, rigidity, strength and resistance to fracture. For total joint replacement, metals are needed to be wear resistance; therefore debris formation from friction can be avoided. Dental restoration requires strong and rigid metals and even the shape memory effect for better results. In overall, the use of biomaterials in clinical practice should be approved by an authoritative body such as the FDA (United States Food and Drug Administration). The proposed biomaterial will be either granted Premarket Approval (PMA) if substantially equivalent to o n e u s e d b e f o r e F D A l e g i s l a t i o n o f 1 9 7 6 , o r h a s t o g o t h r o u g h a s e r i e s o f g u i d e d biocompatibility assessment. Common metals used for biomedical devicesUp to now, the three most used metals for implants are stainless steel, CoCr alloys and Ti alloys. The first stainless steel used for implants contains ~18wt% Cr and ~8wt% Ni makes it stronger than the steel and more resistant to corrosion. Further addition of molybdenum (Mo) has improved its corrosion resistance, known as type 316 stainless steel. Afterwards, the carbon (C) content has been reduced from 0.08 to 0.03 wt% which improved its corrosion resistance to chloride solution, and named as 316L. Titanium is featured by its light weight. Its density is only 4.5g/cm 3 compared to 7.9g/cm 3 for 316 stainless steel and 8.3g/cm 3 for cast CoCrMo alloys (Brandes and Brook, 1992). Ti and its alloys, i.e. Ti6Al4V are known for their excellent tensile strength and pitting corrosion resistance. Titanium alloyed with Ni, i.e. Nitinol, forms alloys having shape memory effect which makes them suitable in various applications such as dental restoration wiring. In dentistry, precious metals and alloys often used are Au, Ag, Pt and their alloys. They possess good castability, ductility and resistance to corrosion. Included into dental alloys are AuAgCu system, AuAgCu with the addition of Zn and Sn known as dental solder, and AuPtPd system used for porcelain-fused-to-metal for teeth repairs. CoCr alloys have been utilised for many decades in making artificial joints. They are generally known for their excellent wear resistance. Especially the wrought CoNiCrMo alloy has been used for making heavily loaded joints such as ankle implants (Figure 1). Other metals used for implants include tantalum (Ta), amorphous alloys and biodegradable metals. Tantalum which has excell...

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“…The microstructure of a thermally sprayed coating is generally inhomogeneous and is associated with inter-particle voids and gaps [26]. Porous coating obtained by another thermal spraying method, plasma spraying, may cause accelerated corrosion of the substrate due to acidification caused in a local environment [27]. The heterogeneous microstructure of the nanocarbide coatings with the presence of small amounts of porosity within the coatings may serve as the pathways for fluid ingress and the possibility for a localized electrochemical attack.…”

Section: Discussionmentioning

confidence: 99%

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

Swaminathan¹,

Zeng²,

Lawrynowicz³

et al. 2012

Electrochimica Acta

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Electrochemical corrosion and metal ion release from Co-Cr-Mo prosthesis with titanium plasma spray coating

Cited by 70 publications

References 25 publications

Corrosion behavior of a ZrCN coated Ti alloy with potential application as a bipolar plate for proton exchange membrane fuel cell

Corrosion behavior of a ZrCN coated Ti alloy with potential application as a bipolar plate for proton exchange membrane fuel cell

Metals for Biomedical Applications

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

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