Abstract
The effects of chromate and vanadate anions on the hot corrosion of preoxidized Ni by a thin fused 
film in an
gas atmosphere at 900°C were investigated by use of a sodium sensor and an oxygen probe. The chromate anion suppressed the sulfidation of Ni probably by precipitating solid 
from the melt. However, the corrosion rate during self‐sustained hot corrosion was faster than for a pure sodium sulfate melt, probably due to the fast counterdiffusion of
species. The vanadate anion rapidly attacked the 
protective oxide and enhanced the sulfidation of Ni causing a self‐sustained hot corrosion of Ni.