电化学抛光对激光粉末床熔融纯Mo降解行为的影响OA

Laser Powder Bed Fusion(LPBF)is a key technology for fabricating customized porous pure molybdenum(Mo)structures.However,problems including high surface roughness and inadequate corrosion resistance still plague LPBF-fabricated pure Mo specimen.The primary eco-friendly post-treatment method for LPBF-fabricated pure Mo is electrochemical polishing(ECP).The effects of different ECP conditions on the surface roughness and degradation characteristics of LPBF-fabricated pure Mo was investigated in this study.The results demonstrated that the surface roughness of the specimens was significantly reduced from 4.55μm to 1.05μm after ECP treatment.Compared with as-received specimens,the corrosion current density of the polished specimens decreased by 78.4％.The weight loss rate steadily increases with longer immersion times and decreases in the following order:as-fabricated,semi-polished,and polished.Local acidification was eliminated due to a pH fluctuation value of ≤0.5 in the solution during the degradation process,complying with the requirements of biomedical materials.In this study,an essential theoretical foundation was offered for logically controlling the degrading behavior and rate uniformity of its implants by ECP surface application of Mo-based materials.