Details

Autor(en) / Beteiligte

• Zhang, C. L.
• Zhu, M.
• Yuan, Y. F.
• Guo, S. Y.
• Zhu, G. T.

Titel

Comparison of Corrosion Behavior of CoCrNi Medium-Entropy Alloy with CoCrFeMnNi High-Entropy Alloy in SO2-Polluted Marine Environment

Ist Teil von

• Journal of materials engineering and performance, 2024, Vol.33 (2), p.541-555

Ort / Verlag

New York: Springer US

Erscheinungsjahr

2024

Quelle

SpringerNature Journals

Beschreibungen/Notizen

• A comparative study on the corrosion behavior of CoCrNi medium-entropy alloy (MEA) with CoCrFeMnNi high-entropy alloy (HEA) in SO 2 -polluted marine environment was investigated by a series of tests. Results indicate that CoCrNi MEA possesses smaller passive current density, larger polarization resistance and lower corrosion rate compared with those of CoCrFeMnNi HEA, which demonstrates that the MEA possesses better anti-corrosion performance than the HEA. This could be ascribed to the detail difference in the microstructure and passive film of the two alloys. Compared with the MEA, the smaller grain size and the larger number of oxides reduce the anti-corrosion performance of the HEA. Moreover, the oxide and matrix constitute the micro-galvanic corrosion cell, which promotes the generation of pits.