Effect of Cr, Mo and W on the Microstructure of Al Hot Dipped Carbon Steels

Effect of Cr, Mo and W on the Microstructure of Al Hot Dipped Carbon Steels

A low carbon steel, Fe-2.25%Cr steel (ASTM T22), and Fe-2.25%Cr-1.6%W steel (ASTM T23) were aluminized by hot dipping into molten Al baths. After hot-dipping, a thin Al-rich topcoat and a thick alloy layer formed on the surface. The topcoat consisted primarily of a thin Al layer that contained a sma...

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Veröffentlicht in:Corrosion science and technology 2014-02, Vol.13 (1), p.1-5
Hauptverfasser: Trung, Trinh Van, Kim, Min Jung, Park, Soon Yong, Yadav, Poonam, Abro, Muhammad Ali, Lee, Dong Bok
Format: Artikel
Sprache:kor
Schlagworte:
hot-dip aluminizing
low carbon steel
T22
T23
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Zusammenfassung:A low carbon steel, Fe-2.25%Cr steel (ASTM T22), and Fe-2.25%Cr-1.6%W steel (ASTM T23) were aluminized by hot dipping into molten Al baths. After hot-dipping, a thin Al-rich topcoat and a thick alloy layer formed on the surface. The topcoat consisted primarily of a thin Al layer that contained a small amount of Fe, whereas the alloy layer consisted of Al-Fe intermetallics such as Al5Fe2 and AlFe. Cr, Mo, and W in T22 and T23 steels reduced the thickness of the topcoat and the alloy layer, and flattened the reaction front of the aluminized layer, when compared to the low carbon steel.
ISSN:1598-6462