Electrochemical Behavior of CoCrMo Alloy in the Active State in Acidic and Alkaline Buffered Solutions

Contu, F.; Elsener, Bernhard; Böhni, H.

doi:10.1149/1.1595660

Cited by 40 publications

(28 citation statements)

References 22 publications

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“…There are many unknown parameters in the Eq. [13], so we have to make reasonable assumptions to reduce the fitting model. Firstly, we can assume θ 0 = 0 since the electrode is under aggressive polishing with the presence of abrasives; secondly, we can locate t 0 within the accuracy of 1 second; thirdly, we have the knowledge of OCP at t = t 0 .…”

Section: Resultsmentioning

confidence: 99%

The Open-Circuit Potential of a Polarizable and Reactive Electrode

Chen

2008

ECS Trans.

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The open-circuit potential (OCP) of a polarizable and reactive electrode is modeled by the combination of the mixed potential theory and the Frumkin effect. The product of surface oxidation reaction alters the electrolyte double layer structures at the interface, which conversely affects the surface reaction rate. Triboelectrochemical experiments were carried out with a tungsten rotating disc electrode in a series of diluted KIO 3 solutions at pH 2.00. The OCP change with time during the passivation of the electrode surface is fitted based on the model. All the fitting results can provide coherent and reasonable physical meanings, and the apparent surface reaction rate of 1.1 × 10 4 (mol/L) -1 sec -1 of the tungsten electrode surface by KIO 3 is thus obtained.

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Section: Resultsmentioning

confidence: 99%

The Open-Circuit Potential of a Polarizable and Reactive Electrode

Chen

2008

ECS Trans.

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“…However, overall results are not conclusive and the exact effect of proteins on corrosion is still the topic of much debate 55. Some authors demonstrate that proteins can enhance the propagation of charges between implant and surrounding fluids while others suggest a reduced charge transfer by proteins 56–59…”

Section: Biocorrosionmentioning

confidence: 99%

Metal is not inert: Role of metal ions released by biocorrosion in aseptic loosening—Current concepts

Cadosch

Chan

Gautschi

et al. 2009

J Biomedical Materials Res

164

118

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Metal implants are essential therapeutic tools for the treatment of bone fractures and joint replacements. The metals and metal alloys used in contemporary orthopedic and trauma surgery are well tolerated by the majority of patients. However, complications resulting from inflammatory and immune reactions to metal implants have been well documented. This review briefly discusses the different mechanisms of metal implant corrosion in the human body, which lead to the release of significant levels of metal ions into the peri-implant tissues and the systemic blood circulation. Additionally, this article reviews the effects of the released ions on bone metabolism and the immune system and discusses their involvement in the pathophysiological mechanisms of aseptic loosening and metal hypersensitivity in patients with metal implants.

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“…CoCr-based alloys have been utilized in dental prosthesis, since they offer good resistance to corrosion (8,9). Recently, alloys with high content of tungsten instead molybdenum have been developed aiming a better ceramicmetal adhesion (10).…”

Section: Introductionmentioning

confidence: 99%

In Vitro Cytotoxicity Test and Surface Characterization of CoCrW Alloy in Artificial Saliva Solution for Dental Applications

et al. 2016

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In order to evaluate its application as a dental prosthesis material, a CoCrW alloy was subjected to in vitro cytotoxicity test, surface characterization and electrochemical studies performed in artificial saliva and 0.15 mol.L -1 NaCl medium. The used techniques were: anodic polarization curves, chronoamperometric measurements, electrochemical impedance spectroscopy (EIS), scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS) analysis and X-ray photoelectron spectroscopy (XPS). Cytotoxicity test was also performed. The electrochemical behavior of CoCrW alloy was compared in both studied media, from corrosion potential (E corr ) to a 600 mV anodic overvoltage. From the electrochemical measurements it was observed that the CoCrW alloy in both media presents only generalized corrosion. SEM and EDS analysis showed that the alloy presents carbide niobium and silicon and manganese oxides as nonmetallic inclusions. XPS results indicated that cobalt does not significantly contribute to the passivating film formation. Cytotoxicity test showed no cytotoxic character of CoCrW alloy. These results suggest that the CoCrW alloy can be used as biomaterial to be applied as prosthesis in dental implants. In Vitro Cytotoxicity Test and S u r f a c e C h a r a c t e r i z a t i o n o f

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Electrochemical Behavior of CoCrMo Alloy in the Active State in Acidic and Alkaline Buffered Solutions

Cited by 40 publications

References 22 publications

The Open-Circuit Potential of a Polarizable and Reactive Electrode

The Open-Circuit Potential of a Polarizable and Reactive Electrode

Metal is not inert: Role of metal ions released by biocorrosion in aseptic loosening—Current concepts

In Vitro Cytotoxicity Test and Surface Characterization of CoCrW Alloy in Artificial Saliva Solution for Dental Applications

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