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- W14286162 abstract "Purpose: The main purpose of this study was to evaluate physical and chemical properties of Cr-Ni-Mo steel and Co-Cr-W-Ni alloy with modified surface, used for implants in human urinary system. Design/methodology/approach: Evaluation of physical and chemical properties of biomaterials was made on the ground of corrosion resistance tests and analysis of chemical composition of surface layer. Resistance to pitting corrosion was evaluated on the ground registered anodic polarisation curves by means of potentiodynamic method. Chemical composition investigations of the passive layer have been carried out with the use of X-ray Photoelectron Spectroscopy (XPS). Findings: Obtained test results show more favourable physical and chemical characteristics of Co-Cr-W-Ni alloy when compared to Cr-Ni-Mo steel. Suggested processes of surface treatment guarantee the improvement of corrosion resistance, and hence – biocompatibility of both metallic biomaterials in artificial urine. Research limitations/implications: Obtained test results indicate the necessity to select such physiological solution for corrosion tests, that would reflect specificity of the environment in which the implant will be functioning. Complementation of presented tests with measurements of stress and fatigue corrosion resistance will enable complex evaluation of behaviour of those biomaterials in urinary system environment. Practical implications: Analysis of test results shows favourable influence of suggested surface treatment of Co-Cr-W-Ni alloy. Samples with electrolytically polished and chemically passivated surface featured the best physical and chemical characteristics. Originality/value: After 30 days’ exposure in artificial urine solution passive layer created on the surface of Co-Cr-W-Ni alloy has better combination of physical and chemical properties than passive layer created on steel." @default.
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- W14286162 date "2010-01-01" @default.
- W14286162 modified "2023-09-25" @default.
- W14286162 title "Physicochemical properties of Cr-Ni-Mo steel and Co-Cr-W-Ni alloy applied in urology" @default.
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