LAUSR

Abstract Effects of Cr 3+ on the corrosion of SiC in LiF–NaF–KF molten salt were investigated. Results reveal that Cr 3+ can drive the corrosion of SiC. Thickness of the corroded region induced by Cr 3+ is greater than 12 μm for 400 h, while the corroded region induced by pure salt is ∼2.5 μm. Corrosion induced by Cr 3+ should be attributed to the reactions of Cr 3+ with SiC. Cr 3+ reacts with SiC to form Cr 3 C 2 , Cr 7 C 3 , and graphitic carbon in the corroded region of SiC, which results in the dissolution of element Si from SiC into the salt.