Improvement of resistance of TiAl alloy against high temperature oxidation by electroplating in AlCl3–NaCl–KCl–CrCl2 molten salt

摘要: Abstract For improvement of the oxidation resistance a TiAl alloy under high temperature conditions, aluminum chromium alloys were electroplated on in an AlCl3–NaCl–KCl molten salt containing CrCl2 at 423 K. The deposit −0.1 V vs. Al/Al3+ consists γ-Al8Cr5 single phase, including content 41 at.%. A mixture phase and Al is, however, formed potential from −0.2 to −0.4 V. electrodeposit layer was evaluated by test 1173 K for 24 h. On specimen covered with which deposited V, uniform AlCr2 during thin dense Al2O3. Both Al2O3 layers play role superior protection alloy; therefore, plating reduced oxide thickness 1/40 h that without any plating.