Effect of Heat Treatment on Corrosion Resistance of 3D Printed Titanium Alloy

Electrochemical method was used to study the corrosion resistance of 3D printed titanium alloy in 1 mol/L hydrochloric acid solution under different heat treatment conditions, and the microstructure of the alloy was also observed. The results show that the structure of the 3D printed titanium alloy was a fine needle-like α + β net basket structure; after aging treatment, α phase precipitated and coarsened, and the corrosion resistance was weakened; after water cooling treatment, the structure of the alloy was transformed into a special α + β net structure,which was composed of coarse lamellar α phase and fine needle-shaped α phase, and the corrosion resistance was further weakened. In the 1 mol/L hydrochloric acid solution, the corrosion resistance of as-deposited alloy was the strongest, the corrosion resistance of ageing alloy was the second, and the corrosion resistance of ageing water-cooled alloy was the worst.