Quick-homogeneous Corrosion of Ti-2Al-2.5Zr Alloy in High-temperature and High-pressure Water Steam

摘要

The corrosion behavior of Ti-2Al-2.5Zr alloy with 5 alloy contents and 5 surface states were studied in water steam at 400deg.C, 10.3 MPa for 72 h. The weight-increments of all samples are under 4 mg/dm~2, better than Zr and Zr-alloy. α-Ti is oxidized into anatase-type TiO_2 preferen- tially. The corrosion resistance is improved by adding Al element or pre-oxidizing treatment, the latter is more effective relatively.