The use of multiple pseudo-physiological solutions to simulate the degradation behavior of pure iron as a metallic resorbable implant: a surface-characterization study

摘要: Understanding the interactions of a pure iron surface with biological elements, such as ions and proteins in an aqueous medium, is essential for accurate vitro assessment corrosion patterns. In fact, synergy chlorides, carbonates, phosphates complex organic molecules present body environment key factor affecting both vivo degradation materials, especially its alloys. The aim this work was patterns 5 commercial pseudo-physiological solutions by thorough study degraded chemistry morphology. It also provides methodological basis to understand short-term mechanism degradable depending on surrounding physiological media. standard static immersion test modified adapt procedure solutions. After 14-day test, surfaces samples were investigated scanning electron microscopy, stylus profilometry atomic force microscopy techniques. phase composition layers evaluated, respectively, X-ray photoelectron spectrometry diffractometry. morphology found be different test-solutions: phosphate-rich solutions, formation adherent passive layer found; mechanisms related general predominant all other conclusion, chemical used medium plays fundamental role pattern iron, so that direct comparisons ion concentrations, reported literature, need carefully assessed.