The Oxidation of the HiSiMo Cast Irons Alloyed with Cr/Al at 800 °C

Wenhui Zhu; Bruce A. Pint; Yang Huo; Larry Godlewski; Bita Ghaffari; Simon Lekakh; Carlos Engler-Pinto; Mei Li

doi:10.1007/s11085-022-10098-3

The Oxidation of the HiSiMo Cast Irons Alloyed with Cr/Al at 800 °C

Wenhui Zhu
, Bruce A. Pint
, Yang Huo
, Larry Godlewski
, Bita Ghaffari
, Simon Lekakh
, Carlos Engler-Pinto
, Mei Li

Corrosion Science & Technology

Research output: Contribution to journal › Article › peer-review

2 Scopus citations

Abstract

To improve the oxidation resistance of cast iron containing Si and Mo (HiSiMo), 1wt.% Cr and 3wt.% Al were added into the base alloy to improve high temperature oxidation resistance for exhaust manifold applications. Oxidation tests were performed in both dry and wet air (air + 10% H₂O) at 800 °C for 1, 10, 24, and 50 h. The mass change and oxide thickness were measured to evaluate the oxidation resistance. Scanning electron microscopy with energy dispersive X-ray spectroscopy (SEM/EDS) and transmission electron microscopy (TEM) were employed to characterize the oxidized samples. The results showed that the additions of Al or Cr selectively oxidized to form a more oxidation resistant surface oxide layer, which reduced the mass gain during these experiments.

Original language	English
Pages (from-to)	441-449
Number of pages	9
Journal	Oxidation of Metals
Volume	97
Issue number	3-4
DOIs	https://doi.org/10.1007/s11085-022-10098-3
State	Published - Apr 2022

Funding

The authors would like to thank the financial support by the US Department of Energy, Office of Energy Efficiency and Renewable Energy (Vehicle Technologies Office, Propulsion Materials Program) under Award No. DE-EE0008458.

Keywords

Cast iron
HiSiMo
Oxidation
TEM

Access to Document

10.1007/s11085-022-10098-3

Cite this

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title = "The Oxidation of the HiSiMo Cast Irons Alloyed with Cr/Al at 800 °C",

abstract = "To improve the oxidation resistance of cast iron containing Si and Mo (HiSiMo), 1wt.\% Cr and 3wt.\% Al were added into the base alloy to improve high temperature oxidation resistance for exhaust manifold applications. Oxidation tests were performed in both dry and wet air (air + 10\% H2O) at 800 °C for 1, 10, 24, and 50 h. The mass change and oxide thickness were measured to evaluate the oxidation resistance. Scanning electron microscopy with energy dispersive X-ray spectroscopy (SEM/EDS) and transmission electron microscopy (TEM) were employed to characterize the oxidized samples. The results showed that the additions of Al or Cr selectively oxidized to form a more oxidation resistant surface oxide layer, which reduced the mass gain during these experiments.",

keywords = "Cast iron, HiSiMo, Oxidation, TEM",

author = "Wenhui Zhu and Pint, \{Bruce A.\} and Yang Huo and Larry Godlewski and Bita Ghaffari and Simon Lekakh and Carlos Engler-Pinto and Mei Li",

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doi = "10.1007/s11085-022-10098-3",

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T1 - The Oxidation of the HiSiMo Cast Irons Alloyed with Cr/Al at 800 °C

AU - Zhu, Wenhui

AU - Pint, Bruce A.

AU - Huo, Yang

AU - Godlewski, Larry

AU - Ghaffari, Bita

AU - Lekakh, Simon

AU - Engler-Pinto, Carlos

AU - Li, Mei

PY - 2022/4

Y1 - 2022/4

N2 - To improve the oxidation resistance of cast iron containing Si and Mo (HiSiMo), 1wt.% Cr and 3wt.% Al were added into the base alloy to improve high temperature oxidation resistance for exhaust manifold applications. Oxidation tests were performed in both dry and wet air (air + 10% H2O) at 800 °C for 1, 10, 24, and 50 h. The mass change and oxide thickness were measured to evaluate the oxidation resistance. Scanning electron microscopy with energy dispersive X-ray spectroscopy (SEM/EDS) and transmission electron microscopy (TEM) were employed to characterize the oxidized samples. The results showed that the additions of Al or Cr selectively oxidized to form a more oxidation resistant surface oxide layer, which reduced the mass gain during these experiments.

AB - To improve the oxidation resistance of cast iron containing Si and Mo (HiSiMo), 1wt.% Cr and 3wt.% Al were added into the base alloy to improve high temperature oxidation resistance for exhaust manifold applications. Oxidation tests were performed in both dry and wet air (air + 10% H2O) at 800 °C for 1, 10, 24, and 50 h. The mass change and oxide thickness were measured to evaluate the oxidation resistance. Scanning electron microscopy with energy dispersive X-ray spectroscopy (SEM/EDS) and transmission electron microscopy (TEM) were employed to characterize the oxidized samples. The results showed that the additions of Al or Cr selectively oxidized to form a more oxidation resistant surface oxide layer, which reduced the mass gain during these experiments.

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KW - HiSiMo

KW - Oxidation

KW - TEM

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