Corrosion behavior of L-PBF Ti6Al4V with heat treatments in the F--containing environments

In this study, the corrosion resistance of L-PBF Ti6Al4V with heat treatments in F--containing environments is investigated. Under the condition of 0.20 M NaF, the corrosion resistance decreases with heating temperature and holding time increasing, while an opposite phenomenon is presented as the concentration increase to 0.50 M. The corrosion product layer in the solution with 0.20 M NaF is constituted of AlF3 particles and replaced by 4AlOF???TiOF2???H2O in the other condition. The corrosion resistance of L-PBF Ti6Al4V depends on the corrosion product layer, and the difference in the layer formation process is responsible for the contrary phenomenon.

Automated summary

The corrosion resistance of L-PBF Ti6Al4V with heat treatments in F-containing environments was investigated. The corrosion resistance decreased with increasing heating temperature and holding time under 0.20 M NaF condition, while the opposite phenomenon occurred with the concentration increase to 0.50 M. The corrosion product layer in the 0.20 M NaF solution was composed of AlF3 particles and replaced by 4AlOF?TiOF2?H2O in the other condition. The difference in the layer formation process was responsible for the observed contrary phenomenon.