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

Journal Article · · Oxidation of Metals
 [1];  [2];  [1];  [1];  [1];  [3];  [1];  [1]
  1. Ford Motor Company, Dearborn, MI (United States)
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  3. Missouri Univ. of Science and Technology, Rolla, MO (United States)
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. Here, 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.
Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Transportation Office. Vehicle Technologies Office
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
1856700
Journal Information:
Oxidation of Metals, Journal Name: Oxidation of Metals Journal Issue: 3-4 Vol. 97; ISSN 0030-770X
Publisher:
SpringerCopyright Statement
Country of Publication:
United States
Language:
English

References (25)

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Influence of Cr and Ni on High-Temperature Corrosion Behavior of Ferritic Ductile Cast Iron in Air and Exhaust Gases journal February 2013
Long-Term Oxidation of Candidate Cast Iron and Stainless Steel Exhaust System Alloys from 650 to 800 °C in Air with Water Vapor journal August 2014
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High Temperature Oxidation and Decarburization of SiMo Cast Iron in Air and Combustion Atmospheres journal April 2021
Prevention of High-Temperature Surface Degradation in SiMo Cast Irons by Cr and Al Alloying journal September 2020
Cracking behavior in a dissimilar weld between high silicon nodular cast iron and ferritic stainless steel journal June 2010
Ellingham Diagram book November 2013
The mechanism of breakthrough of protective chromium oxide scales on Fe-Cr alloys journal January 1967
Thermal Fatigue Behavior and Cracking Characteristics of High Si-Mo Nodular Cast Iron for Exhaust Manifolds journal June 2013
High temperature materials for heavy duty diesel engines: Historical and future trends journal June 2019
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Degradation of Components After Exposure in a Biomass Pyrolysis System journal September 2019

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