Tracer study of oxygen and hydrogen uptake by Mg alloys in air with water vapor

Journal Article · Fri May 15 00:00:00 EDT 2015 · Scripta Materialia

DOI:https://doi.org/10.1016/j.scriptamat.2015.04.032· OSTI ID:1185942

Brady, M. P. ^[1]; Fayek, M. ^[2]; Meyer, H. M. ^[1]; Leonard, D. N. ^[1]; Elsentriecy, H. H. ^[3]; Unocic, K. A. ^[1]; Anovitz, L. M. ^[1]; Cakmak, E. ^[1]; Keiser, J. R. ^[1]; Song, G. L. ^[1]; Davis, B. ^[4]

---

1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
2. Univ. of Manitoba, Winnipeg (Canada)
3. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Central Metallurgical Research and Development Inst., Cairo (Egypt)
4. Magnesium Elektron North America, Madison, IL (United States)

We studied the pure oxidation of Mg, Mg–3Al–1Zn (AZ31B), and Mg–1Zn–0.25Zr–<0.5Nd (ZE10A) at 85 °C in humid air using sequential exposures with H₂¹⁸O and D₂¹⁶O for water vapor. Incorporation of ¹⁸O in the hydroxide/oxide films indicated that oxygen from water vapor participated in the reaction. Moreover, penetration of hydrogen into the underlying metal was observed, particularly for the Zr- and Nd-containing ZE10A. Isotopic tracer profiles suggested a complex mixed inward/outward film growth mechanism.

• Research Organization: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Sciences (CNMS)
• Sponsoring Organization: USDOE Office of Energy Efficiency and Renewable Energy (EERE), Vehicle Technologies Office (EE-3V); USDOE Office of Science (SC), Basic Energy Sciences (BES); USDOE Office of Energy Efficiency and Renewable Energy (EERE), Office of Sustainable Transportation. Vehicle Technologies Office (VTO)
• Grant/Contract Number: AC05-00OR22725
• OSTI ID: 1185942
• Alternate ID(s): OSTI ID: 1251489
• Journal Information: Scripta Materialia, Vol. 106, Issue C; ISSN 1359-6462
• Publisher: Elsevier
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
Magnesium alloys
Oxidation
Hydrogen diffusion
Secondary ion mass spectroscopy (SIMS)
Water vapor