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Corrosion and wear play significant roles in the aseptic loosening of artificial hip joints for the long-term service. In this present study, tribo-corrosion tests were carried out through a reciprocating ball-on-plate system to evaluate the corrosion and wear properties of CoCrMo, Ti6Al4V and Ti15Mo alloys in a simulated body fluid (SBF) solution. It was found that the tribo-corrosion behaviours of CoCrMo/Al 2 O 3 and Ti15Mo/Al 2 O 3 systems had significant wear-corrosion synergistic interaction, and wear-induced corrosion was dominant. For Ti6Al4V/Al 2 O 3 systems, their wear mechanism under SBF lubrication was a combination of abrasive, adhesive and fatigue wear. While the wear mechanism of the Ti15Mo/Al 2 O 3 system under synergistic interaction was a combination of abrasive and adhesive wear. Finally, it was suggested that the Ti15Mo alloy would be the better alternative for metal implant applications compared with the CoCrMo alloy for the consideration of both wear and potential poisonous ions such as Co(III) and Cr(VI).

The lengthy production procedures of FeV alloy from vanadium slag (VS) presently may cause high production costs and hazardous leaching liquor waste containing toxic V5+ and Cr6+ ions. A two‐step direct reduction technology is considered a short and environmental‐friendly process to solve the aforementioned problems. Solar grade silicon cutting slurry waste (SoG‐Siw) containing Si and SiC is regarded as an effective reductant to achieve comprehensive resource utilization and control reductant cost. The element migration behaviors during the reduction process are clarified from phase transitions and microcosmic features. The results showed that 78.7 wt% of Fe and 38.6 wt% of Cr migrated from slag to the metal phase with a mass ratio of pretreated SoG‐Siw (Si‐SiCmixt) to VS (S/V) of 0.15 after soaking at 1823 K for 60 min. The content of V2O3 is enriched from 12.14 to 16.13 wt%. The mass ratio of V to Fe increased from 0.28 to 1.40, satisfying the composition goal of the production of FeV60 alloy (50–65 wt% V). With an increase of S/V to 0.20, 4.6 wt% of V migrated from slag to the metal phase, causing the loss of vanadium. The reduction path is FeO → Fe2TiO4 → (Mn, Fe)(V, Cr)2O4 → (V, Cr)2O3.

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