Effect of Heat Treatment on the Corrosion Behaviour of Rapidly Solidified Al-8Ni-2Co Alloy in NaCl Solution.

Authors

Fawzy El-Sabbahy, Assistant Professor of Metallurgy Department, Faculty of Petroleum and Mining Engineering, Suez Canal University, Suez, Egypt.
M. Kassem, Assistant Professor of Metallurgy Department, Faculty of Petroleum and Mining Engineering, Suez Canal University, Suez, Egypt.
R. Ramadan, Associate Professor of Metallurgy Department, Faculty of Petroleum and Mining Engineering, Suez Canal University, Suez, Egypt.

Corresponding Author

Kassem, M.

Subject Area

Mechanical Power Engineering

Article Type

Original Study

Abstract

The corrosion behaviour of as-rapidly solidified and heat treated AI 8Ni-2Co alloy ribbons produced using melt spinning technique was investigated. The decomposition behaviour of the rapidly solidified ribbons was followed up using x-ray diffraction, differentialscanningcalometry. microhardness, and metallography. The stable phases which are generally formed in conventional solidified alloy in the as cast condition, were not detected in the as-rapidly solidified specimens. Instead, super-saturated solid solution α-AI was present in addition to fine dispersoids of A19(CoNi)2. The corrosion behaviour was investigated through potentiostatic technique in 3.5% NaCL aqueons solution. The corrosion rate was the lowest in the as-rapidly solidified condition and increased with increasing the annealing temperature as a result of the formation and coarsening of the intermetallic Al3Ni.

Recommended Citation

El-Sabbahy, Fawzy; Kassem, M.; and Ramadan, R. (2020) "Effect of Heat Treatment on the Corrosion Behaviour of Rapidly Solidified Al-8Ni-2Co Alloy in NaCl Solution.," Mansoura Engineering Journal: Vol. 20 : Iss. 1 , Article 9.
Available at: https://doi.org/10.21608/bfemu.2021.160683