Corrosion behavior of Ti3AlC2 in molten KOH at 700 °C

This paper investigated the corrosion behaviors of Ti 3 AlC 2 at 700 °C in molten KOH with various mass ratios. If the mass ratio of KOH:Ti 3 AlC 2 ⩽2, Ti 3 AlC 2 can resist KOH hot corrosion in 2 h. Ti 3 AlC 2 suffered serious corrosion attack if the mass ratio⩾3. The main compositions of corroded samples were amorphous graphite and potassium titanates (K 2 O· n TiO 2 ). If the samples were washed by acid and dried, potassium titanates could decompose to K 2 O and amorphous rutile. Based on the experimental results, a corrosion mechanism of Ti 3 AlC 2 in molten KOH was proposed.