FeAlの塩酸水溶液に対する耐食性に及ぼすニッケルおよび銅の添加の影響

抄録

The addition of Cr to intermetallic compound FeAl improves its corrosion resistance in HCl aqueous solution. Furthermore, corrosion resistance effects of FeAl containing additional Ni and Cu, which improve the steel corrosion resistance, were assessed during immersion in 0.1 mol/L HCl aqueous solution. Results show that the addition of Ni or Cu reduced the FeAl corrosion rate similarly to the addition of Cr. The FeAl corrosion rate was reduced to 1/9 by the addition of Ni, and to 1/16 by the addition of Cu, and to approximately zero by the addition of Cr. The FeAl contained 12 at% Ni and the FeAl contained 12 at% Cu, which showed superior corrosion resistance to that of SUS430. The FeAl containing 12 at% Cr showed superior corrosion resistance to that of SUS304.