Journal
APPLIED SURFACE SCIENCE
Volume 257, Issue 13, Pages 5871-5878Publisher
ELSEVIER
DOI: 10.1016/j.apsusc.2011.01.126
Keywords
Selective oxidation; Hot galvanized steel; Dual phase steel; X-ray photoelectron spectroscopy; Glow discharge optical emission spectroscopy
Categories
Funding
- National Council of Scientific and Technological Development (CNPq)
- Coordination of improvement of superior level staff, CAPES
- Foundation of Research Support in the State of Minas Gerais, FAPEMIG
- USIMINAS Industrial Group
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Hot galvanized steels have been extensively used in the automotive industry. Selective oxidation on the steel surface affects the wettability of zinc on steel and the grain orientation of inhibition layer (Fe-Al-Zn alloy) and reduces the iron diffusion to the zinc layer. The aim of this work is to identify and quantify selective oxidation on the surface of a dual phase steel, and an experimental steel with a lower content of manganese, annealed at different dew points. The techniques employed were atomic force microscopy, X-ray photoelectron spectroscopy, and glow discharge optical emission spectroscopy. External selective oxidation was observed for phosphorus on steel surface annealed at 0 degrees C dp, and for manganese, silicon, and aluminum at a lower dew point. The concentration of manganese was higher on the dual phase steel surface than on the surface of the experimental steel. The concentration of molybdenum on the surface of both steels increased as the depth increased. (C) 2011 Elsevier B.V. All rights reserved.
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