The Effect of Impurity Elements on the Corrosion Resistance of Commercially Pure Titanium

Abstract

In the oxidizing solution, boiling 65% HNO3, any impurity element has no effect on the corrosion rate.In the non-oxidizing acid solutions where titanium is actively corroded, the corrosion rates are increased by the presence of more than 0.15% Fe in the boiling 1% H2SO4 and 0.03% Fe in the boiling 5%HCl, while the presence of Si, C, and N decrease the corrosion rates slightly and O has no effect.When titanium is subjected to the heat cycle simulated to that of heat affected zone in welding, the presence of more than 0.05% Fe increases the corrosion rate in the boiling 1% H2SO4 solution, whereas Fe exerts no effect in the oxidizing solution.

A novel method of preparing Ti powder for 3D printing

“…It is known that the purity of Ti powder is crucial for its quality and the mechanical properties of the printed parts (Takamura et al , 2009; Yan et al , 2013). The possible impurities in the Ti powder are O, N, H, C, Fe, etc.…”