The Experts below are selected from a list of 36255 Experts worldwide ranked by ideXlab platform
Anne Neville - One of the best experts on this subject based on the ideXlab platform.
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characterisation of the surface topography tomography and chemistry of fretting Corrosion Product found on retrieved polished femoral stems
Journal of The Mechanical Behavior of Biomedical Materials, 2014Co-Authors: Michael Bryant, R. Farrar, J Nolan, Ken Brummitt, R Freeman, Michael B Ward, Anne NevilleAbstract:This study presents the characterisation of the surface topography, tomography and chemistry of fretting Corrosion Product found on retrieved polished femoral stems. Scanning Electron Microscopy (SEM), X-ray Photoelectron Spectroscopy (XPS), Transmission Electron Microscopy (TEM) and Fourier Transform Infrared Spectroscopy (FI-IR) were utilised in order to assess the surface morphology of retrieved Metal-on-Metal Total Hip Replacements and surface chemistry of the films found on the surface. Gross slip, plastic deformation and directionality of the surface were extensively seen on the proximal surfaces of the retrievals. A more corrosive phenomenon was observed in the distal regions of the stem, demonstrating a seemingly intergranular attack. Tribochemical reactions were seen to occur within the stem-cement interfaces with tribofilms being observed on the femoral stem and counterpart PMMA bone cement. XPS, TEM-EDX and FT-IR analyses demonstrated that the films present in the stem surfaces were a complex mixture of chromium oxide and amorphous organic material. A comparison between current experimental and clinical literature has been conducted and findings from this study demonstrate that the formation and chemistry of films are drastically influenced by the type of wear or degradation mechanism. Films formed in the stem-cement interface are thought to further influence the biological environment outside the stem-cement interface due to the formation of Cr and O rich films within the interface whilst Co is free to migrate away.
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Characterisation of the surface topography, tomography and chemistry of fretting Corrosion Product found on retrieved polished femoral stems
Journal of the Mechanical Behavior of Biomedical Materials, 2014Co-Authors: Michael Bryant, R. Farrar, J Nolan, M. Ward, Ken Brummitt, R Freeman, Anne NevilleAbstract:This study presents the characterisation of the surface topography, tomography and chemistry of fretting Corrosion Product found on retrieved polished femoral stems. Scanning Electron Microscopy (SEM), X-ray Photoelectron Spectroscopy (XPS), Transmission Electron Microscopy (TEM) and Fourier Transform Infrared Spectroscopy (FI-IR) were utilised in order to assess the surface morphology of retrieved Metal-on-Metal Total Hip Replacements and surface chemistry of the films found on the surface. Gross slip, plastic deformation and directionality of the surface were extensively seen on the proximal surfaces of the retrievals. A more corrosive phenomenon was observed in the distal regions of the stem, demonstrating a seemingly intergranular attack. Tribochemical reactions were seen to occur within the stem-cement interfaces with tribofilms being observed on the femoral stem and counterpart PMMA bone cement. XPS, TEM-EDX and FT-IR analyses demonstrated that the films present in the stem surfaces were a complex mixture of chromium oxide and amorphous organic material. A comparison between current experimental and clinical literature has been conducted and findings from this study demonstrate that the formation and chemistry of films are drastically influenced by the type of wear or degradation mechanism. Films formed in the stem-cement interface are thought to further influence the biological environment outside the stem-cement interface due to the formation of Cr and O rich films within the interface whilst Co is free to migrate away. © 2013 Elsevier Ltd.
Michael Bryant - One of the best experts on this subject based on the ideXlab platform.
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characterisation of the surface topography tomography and chemistry of fretting Corrosion Product found on retrieved polished femoral stems
Journal of The Mechanical Behavior of Biomedical Materials, 2014Co-Authors: Michael Bryant, R. Farrar, J Nolan, Ken Brummitt, R Freeman, Michael B Ward, Anne NevilleAbstract:This study presents the characterisation of the surface topography, tomography and chemistry of fretting Corrosion Product found on retrieved polished femoral stems. Scanning Electron Microscopy (SEM), X-ray Photoelectron Spectroscopy (XPS), Transmission Electron Microscopy (TEM) and Fourier Transform Infrared Spectroscopy (FI-IR) were utilised in order to assess the surface morphology of retrieved Metal-on-Metal Total Hip Replacements and surface chemistry of the films found on the surface. Gross slip, plastic deformation and directionality of the surface were extensively seen on the proximal surfaces of the retrievals. A more corrosive phenomenon was observed in the distal regions of the stem, demonstrating a seemingly intergranular attack. Tribochemical reactions were seen to occur within the stem-cement interfaces with tribofilms being observed on the femoral stem and counterpart PMMA bone cement. XPS, TEM-EDX and FT-IR analyses demonstrated that the films present in the stem surfaces were a complex mixture of chromium oxide and amorphous organic material. A comparison between current experimental and clinical literature has been conducted and findings from this study demonstrate that the formation and chemistry of films are drastically influenced by the type of wear or degradation mechanism. Films formed in the stem-cement interface are thought to further influence the biological environment outside the stem-cement interface due to the formation of Cr and O rich films within the interface whilst Co is free to migrate away.
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Characterisation of the surface topography, tomography and chemistry of fretting Corrosion Product found on retrieved polished femoral stems
Journal of the Mechanical Behavior of Biomedical Materials, 2014Co-Authors: Michael Bryant, R. Farrar, J Nolan, M. Ward, Ken Brummitt, R Freeman, Anne NevilleAbstract:This study presents the characterisation of the surface topography, tomography and chemistry of fretting Corrosion Product found on retrieved polished femoral stems. Scanning Electron Microscopy (SEM), X-ray Photoelectron Spectroscopy (XPS), Transmission Electron Microscopy (TEM) and Fourier Transform Infrared Spectroscopy (FI-IR) were utilised in order to assess the surface morphology of retrieved Metal-on-Metal Total Hip Replacements and surface chemistry of the films found on the surface. Gross slip, plastic deformation and directionality of the surface were extensively seen on the proximal surfaces of the retrievals. A more corrosive phenomenon was observed in the distal regions of the stem, demonstrating a seemingly intergranular attack. Tribochemical reactions were seen to occur within the stem-cement interfaces with tribofilms being observed on the femoral stem and counterpart PMMA bone cement. XPS, TEM-EDX and FT-IR analyses demonstrated that the films present in the stem surfaces were a complex mixture of chromium oxide and amorphous organic material. A comparison between current experimental and clinical literature has been conducted and findings from this study demonstrate that the formation and chemistry of films are drastically influenced by the type of wear or degradation mechanism. Films formed in the stem-cement interface are thought to further influence the biological environment outside the stem-cement interface due to the formation of Cr and O rich films within the interface whilst Co is free to migrate away. © 2013 Elsevier Ltd.
Srdjan Nesic - One of the best experts on this subject based on the ideXlab platform.
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a direct measurement of wall shear stress in multiphase flow is it an important parameter in co2 Corrosion of carbon steel pipelines
Corrosion Science, 2016Co-Authors: Wei Li, Bert F.m. Pots, Bruce Brown, Srdjan NesicAbstract:Abstract Wall shear stress produced by turbulent multiphase flow is considered an important parameter in CO2 Corrosion as it has been claimed to be responsible for the removal of protective Corrosion Product layers and Corrosion inhibitor films. In this study, a floating element wall probe was used to directly measure wall shear stress in multiphase flow; the highest measured values were of the order of 100 Pa. Findings suggest that the wall shear stress alone, produced in multiphase flow patterns covered in the present study, is insufficient to mechanically damage the protective Corrosion Product layers or Corrosion inhibitor films.
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A direct measurement of wall shear stress in multiphase flow—Is it an important parameter in CO2 Corrosion of carbon steel pipelines?
Corrosion Science, 2016Co-Authors: Wei Li, Bert F.m. Pots, Bruce Brown, Srdjan NesicAbstract:Abstract Wall shear stress produced by turbulent multiphase flow is considered an important parameter in CO2 Corrosion as it has been claimed to be responsible for the removal of protective Corrosion Product layers and Corrosion inhibitor films. In this study, a floating element wall probe was used to directly measure wall shear stress in multiphase flow; the highest measured values were of the order of 100 Pa. Findings suggest that the wall shear stress alone, produced in multiphase flow patterns covered in the present study, is insufficient to mechanically damage the protective Corrosion Product layers or Corrosion inhibitor films.
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electrochemical model of mild steel Corrosion in a mixed h2s co2 aqueous environment in the absence of protective Corrosion Product layers
Corrosion, 2015Co-Authors: Yougui Zheng, Bruce Brown, Jing Ning, Srdjan NesicAbstract:The present study has been conducted to investigate the electrochemistry of mild steel Corrosion in a mixed hydrogen sulfide/carbon dioxide (H2S/CO2) aqueous environment, and develop an electrochemical model to simulate the experimental results. The experiments were designed to determine the effect of H2S on CO2 Corrosion for short-term exposures of a few hours before any interference from iron sulfide Corrosion Product layers happened. Tests were conducted at different H2S concentrations, ranging from 0 to 10% in the gas phase at 1 bar total pressure at pH 4 and pH 5. Mechanisms related to H2S/CO2 Corrosion have been examined by using different techniques such as linear polarization resistance (LPR) using the scan rate 0.125 mV/s), potentiodynamic sweeps (scan rate 1 mV/s), and comparison of experimental results with electrochemical model predictions. Results indicate that the presence of H2S could affect both cathodic reactions and the anodic reaction. An electrochemical model was developed for a mixed ...
J Nolan - One of the best experts on this subject based on the ideXlab platform.
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characterisation of the surface topography tomography and chemistry of fretting Corrosion Product found on retrieved polished femoral stems
Journal of The Mechanical Behavior of Biomedical Materials, 2014Co-Authors: Michael Bryant, R. Farrar, J Nolan, Ken Brummitt, R Freeman, Michael B Ward, Anne NevilleAbstract:This study presents the characterisation of the surface topography, tomography and chemistry of fretting Corrosion Product found on retrieved polished femoral stems. Scanning Electron Microscopy (SEM), X-ray Photoelectron Spectroscopy (XPS), Transmission Electron Microscopy (TEM) and Fourier Transform Infrared Spectroscopy (FI-IR) were utilised in order to assess the surface morphology of retrieved Metal-on-Metal Total Hip Replacements and surface chemistry of the films found on the surface. Gross slip, plastic deformation and directionality of the surface were extensively seen on the proximal surfaces of the retrievals. A more corrosive phenomenon was observed in the distal regions of the stem, demonstrating a seemingly intergranular attack. Tribochemical reactions were seen to occur within the stem-cement interfaces with tribofilms being observed on the femoral stem and counterpart PMMA bone cement. XPS, TEM-EDX and FT-IR analyses demonstrated that the films present in the stem surfaces were a complex mixture of chromium oxide and amorphous organic material. A comparison between current experimental and clinical literature has been conducted and findings from this study demonstrate that the formation and chemistry of films are drastically influenced by the type of wear or degradation mechanism. Films formed in the stem-cement interface are thought to further influence the biological environment outside the stem-cement interface due to the formation of Cr and O rich films within the interface whilst Co is free to migrate away.
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Characterisation of the surface topography, tomography and chemistry of fretting Corrosion Product found on retrieved polished femoral stems
Journal of the Mechanical Behavior of Biomedical Materials, 2014Co-Authors: Michael Bryant, R. Farrar, J Nolan, M. Ward, Ken Brummitt, R Freeman, Anne NevilleAbstract:This study presents the characterisation of the surface topography, tomography and chemistry of fretting Corrosion Product found on retrieved polished femoral stems. Scanning Electron Microscopy (SEM), X-ray Photoelectron Spectroscopy (XPS), Transmission Electron Microscopy (TEM) and Fourier Transform Infrared Spectroscopy (FI-IR) were utilised in order to assess the surface morphology of retrieved Metal-on-Metal Total Hip Replacements and surface chemistry of the films found on the surface. Gross slip, plastic deformation and directionality of the surface were extensively seen on the proximal surfaces of the retrievals. A more corrosive phenomenon was observed in the distal regions of the stem, demonstrating a seemingly intergranular attack. Tribochemical reactions were seen to occur within the stem-cement interfaces with tribofilms being observed on the femoral stem and counterpart PMMA bone cement. XPS, TEM-EDX and FT-IR analyses demonstrated that the films present in the stem surfaces were a complex mixture of chromium oxide and amorphous organic material. A comparison between current experimental and clinical literature has been conducted and findings from this study demonstrate that the formation and chemistry of films are drastically influenced by the type of wear or degradation mechanism. Films formed in the stem-cement interface are thought to further influence the biological environment outside the stem-cement interface due to the formation of Cr and O rich films within the interface whilst Co is free to migrate away. © 2013 Elsevier Ltd.
R Freeman - One of the best experts on this subject based on the ideXlab platform.
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characterisation of the surface topography tomography and chemistry of fretting Corrosion Product found on retrieved polished femoral stems
Journal of The Mechanical Behavior of Biomedical Materials, 2014Co-Authors: Michael Bryant, R. Farrar, J Nolan, Ken Brummitt, R Freeman, Michael B Ward, Anne NevilleAbstract:This study presents the characterisation of the surface topography, tomography and chemistry of fretting Corrosion Product found on retrieved polished femoral stems. Scanning Electron Microscopy (SEM), X-ray Photoelectron Spectroscopy (XPS), Transmission Electron Microscopy (TEM) and Fourier Transform Infrared Spectroscopy (FI-IR) were utilised in order to assess the surface morphology of retrieved Metal-on-Metal Total Hip Replacements and surface chemistry of the films found on the surface. Gross slip, plastic deformation and directionality of the surface were extensively seen on the proximal surfaces of the retrievals. A more corrosive phenomenon was observed in the distal regions of the stem, demonstrating a seemingly intergranular attack. Tribochemical reactions were seen to occur within the stem-cement interfaces with tribofilms being observed on the femoral stem and counterpart PMMA bone cement. XPS, TEM-EDX and FT-IR analyses demonstrated that the films present in the stem surfaces were a complex mixture of chromium oxide and amorphous organic material. A comparison between current experimental and clinical literature has been conducted and findings from this study demonstrate that the formation and chemistry of films are drastically influenced by the type of wear or degradation mechanism. Films formed in the stem-cement interface are thought to further influence the biological environment outside the stem-cement interface due to the formation of Cr and O rich films within the interface whilst Co is free to migrate away.
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Characterisation of the surface topography, tomography and chemistry of fretting Corrosion Product found on retrieved polished femoral stems
Journal of the Mechanical Behavior of Biomedical Materials, 2014Co-Authors: Michael Bryant, R. Farrar, J Nolan, M. Ward, Ken Brummitt, R Freeman, Anne NevilleAbstract:This study presents the characterisation of the surface topography, tomography and chemistry of fretting Corrosion Product found on retrieved polished femoral stems. Scanning Electron Microscopy (SEM), X-ray Photoelectron Spectroscopy (XPS), Transmission Electron Microscopy (TEM) and Fourier Transform Infrared Spectroscopy (FI-IR) were utilised in order to assess the surface morphology of retrieved Metal-on-Metal Total Hip Replacements and surface chemistry of the films found on the surface. Gross slip, plastic deformation and directionality of the surface were extensively seen on the proximal surfaces of the retrievals. A more corrosive phenomenon was observed in the distal regions of the stem, demonstrating a seemingly intergranular attack. Tribochemical reactions were seen to occur within the stem-cement interfaces with tribofilms being observed on the femoral stem and counterpart PMMA bone cement. XPS, TEM-EDX and FT-IR analyses demonstrated that the films present in the stem surfaces were a complex mixture of chromium oxide and amorphous organic material. A comparison between current experimental and clinical literature has been conducted and findings from this study demonstrate that the formation and chemistry of films are drastically influenced by the type of wear or degradation mechanism. Films formed in the stem-cement interface are thought to further influence the biological environment outside the stem-cement interface due to the formation of Cr and O rich films within the interface whilst Co is free to migrate away. © 2013 Elsevier Ltd.
