Corrosion behavior of Ti-10Mo-6Zr-4SN-3Nb in Hank's solution
Ti-10Mo-6Zr-4Snv-3Nb ( Ti-B12 ) exhibits excellent mechanical properties and can be used as a biomaterial.Currently, few research is available on the corrosion behavior of Ti-B12.This paper studies the microstructure and corrosion behavior of Ti-B12 in the as-cast, annealed, and deformed states in Hank' s solution by employing optical microscopy, X-ray diffraction, and electrochemical measurements.Our results indicate that, compared with the as-cast and deformed states of Ti-B12, the annealed Ti-B12 exhibits lower corrosion current density and better corrosion resistance.When subjected to an anodic potential, annealed Ti-B12 shows higher passivation potential, lower passivation current density, and a higher oxygen vacancy diffusion coefficient in both dynamic and static potential polarization tests.This is attributed to the fact that the annealed Ti-B12, compared to the as-cast Ti-B12, has reduced hardness, refined grains, and eliminated microstructural defects.Meanwhile, the deformed Ti-B12 undergoes plastic deformation, leading to more dislocations, the formation of β deformation twins, and a small amount of α precipitation, resulting in increased microstructural hardness.Both annealing and deformation processes significantly alter the microstructure compared to the as-cast Ti-B12 , demonstrating different corrosion behaviors than that of the as-cast Ti-B12 .
国家科技期刊平台
NSTL
万方数据
