Effect of TiC precipitation on the corrosion behavior of Monel K500 alloy in 3.5 wt.% NaCl solution

Effect of Ti on stress corrosion cracking behavior and mechanism of Monel K500 alloy in flowing seawater

“…For the Monel K500 alloy, TiCN particles are in situ precipitated. The semi-coherent interface between TiCN particles and the metal matrix exhibits relatively lower boundary energy compared with that of the metal matrix, which is subject to preferential corrosion of the metal matrix (He et al , 2023). Meanwhile, it is attributed to the relatively higher chemical stability of TiCN particles compared with that of (Ni-Cu-Al) matrix, causing the preferential dissolution of metal matrix acting as an anode and finally leading to the development of corrosion pits (Figure 11) (Depover and Verbeken, 2016; Xia et al , 2023; Xia et al , 2022).…”

“…The effect of Ti on corrosion behavior of Monel K500 alloy was investigated. He et al (2023) found that the addition of Ti is helpful to further strengthen the Monel alloy as the nano-scale precipitation strengthening phase will be formed. Dey et al (1993) reported that Ti was introduced to inhibit the precipitation of M23C6 around grain boundary and homogenize the distribution of alloying elements.…”

“…Katsamas et al (2004) reported that Monel 400 pipe was used to convey a gaseous hydrocarbon stream containing hydrochloric acid to a reaction tower, and SCC was found to be due to hypochlorite induced SCC. He et al (2023) investigated the microstructure of Monel K500 alloy and studied its corrosion behavior in 3.5 Wt.% NaCl solution. The microstructure analysis of Monel K500 alloy showed that the fine TiC precipitates were uniformly distributed in the (Ni-Cu-Al) solid solution matrix and formed a semi-dry interface with the matrix.…”