High Temperature Oxidation Behavior of Aluminized Haynes 230

Journal Article · Tue Sep 01 04:00:00 EDT 2020 · Corrosion Science

DOI:https://doi.org/10.1016/j.corsci.2020.108835· OSTI ID:1647577

Rashidi, S ^[1]; Choi, Jung-Pyung ^[2]; Stevenson, Jeffry W. ^[3]; Pandey, Amit ^[4]; Gupta, R K. ^[1]

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1. University of Akron
2. BATTELLE (PACIFIC NW LAB)
3. PNNL, Retired
4. LG Fuel Cells

The effect of reactive air aluminizing (RAA) on the high-temperature oxidation behavior of the H230 superalloy is studied at 850 °C for 600 hours. Mass gain values are measured and microstructure is studied by XRD, SEM, and EDX. Post oxidation mass gain for the aluminized alloy is reduced compared to wrought alloy. A three-zone microstructure of diffusion coating is observed in RAA H230. Formation and growth of alumina scale during RAA process and oxidation is attributed to the complementary roles of ß-NiAl + ?'-Ni3Al phases in the composite coating.

• Research Organization: Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC05-76RL01830
• OSTI ID: 1647577
• Report Number(s): PNNL-SA-153949
• Journal Information: Corrosion Science, Journal Name: Corrosion Science Vol. 174
• Country of Publication: United States
• Language: English