Blasting and Passivation Treatments for ASTM F139 Stainless Steel for Biomedical Applications: Effects on Surface Roughness, Hardening, and Localized Corrosion

摘要: Due to the combination of good biofunctionality and biocompatibility at low cost, AISI 316 carbon vacuum melting (LVM) stainless steel, as considered in ASTM F139 standard, is often first choice for medical implants, particularly use orthopedic surgery. Proper surface finish must be provided ensure adequate interactions alloy with human body tissues that turn allows material deliver desired performance. Preliminary studies performed our laboratory on 316LVM steel surfaces modified by glass bead blasting (from industrial supplier) followed different nitric acid passivation conditions disclosed necessity extend parameters treatments further consider roughness, pitting corrosion resistance, subsurface hardening measurements, all one, most effective characterization strategy. This was approach adopted present work. Roughness assessment means amplitude parameters, functional an estimator fractal dimension characterizes topography. We clearly demonstrate treatment should carried out under controlled order obtain similar properties. Otherwise, a variation one could modify properties, exerting profound impact its application biomaterial. A step necessary offset detrimental effect resistance.