Molten salt corrosion resistance of FeAl alloy with additions of Li, Ce and Ni

Hot corrosion behaviors of a Cr13Ni5Si2-based metal silicide alloy in Na2SO4+ 25 wt.% K2SO4 and Na2SO4+ 25 wt.% NaCl molten salts

“…The corrosion rate in Na 2 SO 4 þ 25 wt.% K 2 SO 4 is relatively high during the first 20 h of immersion and thereafter the corrosion rate slows down. The overall mass loss per unit surface area of the alloy after 100 h hot corrosion is 1.64 mg/ cm 2 , much lower than that of the Ni-base superalloy K38G and a series of FeAl intermetallic alloys [13,14], indicating high hot corrosion resistance of the alloy in molten Na 2 SO 4 þ 25 wt.% K 2 SO 4 at 900 C. However, corrosion rate of the alloy in the environment of Na 2 SO 4 þ 25 wt.% NaCl mixture is higher and follows a nearly linear law, revealing that the addition of NaCl accelerates the corrosion of the Cr 13 Ni 5 Si 2 -based alloy.…”

Castable cements to prevent corrosion of metals in molten salts

“…Pt-mesh spot-welded to Pt-wire was used as the counter electrode (CE). Platinum has been recommended by several researchers for high temperature molten salt corrosion evaluations using electrochemical techniques [10][11][12][13][14].…”

Preparation technique and alloying effect of aluminide coatings as tritium permeation barriers: A review

“…Similarly, in Fe 3 Al-based alloys, the added C led to a precipitation of perovskite Fe 3 AlC 0.5 carbide phase, resulting in a decrease of hydrogen permeability and diffusivity by a factor of 2 without a significant change of the hydrogen solubility [77]. Gonz alez-Rodríguez et al [76] reported that the effect of the different alloying elements on the hot salt corrosion performance of FeAl-base alloys depended upon the salt used. In NaVO 3 , the FeAl þ Ce þ Ni alloy exhibited the lowest corrosion rate, whereas the FeAl þ Ce þ Li alloy showed the highest one; while in Na 2 SO 4 , the highest corrosion rate was FeAl þ Ce þ Ni, and most of other FeAl-base alloys doped with Ce and/or Ni showed similar corrosion rate.…”