Improvement of High Temperature Oxidation of Low Carbon Steel Exposed to Ethanol Combusition Product at 700 Degres Celcius by Hot-Dip Aluminizing Coating  

Oleh:

Badaruddin, Mohammad

Jenis: Article from Journal - ilmiah nasional - terakreditasi DIKTI
Dalam koleksi: Makara Journal of Technology vol. 15 no. 2 (Nov. 2011), page 137-141.
Topik: Aluminum Steel; Ethanol Combustion Product; Low Carbon Steel
Fulltext: Improvement of High Temperature Oxidation.pdf (475.6KB)

Ketersediaan

Perpustakaan Pusat (Semanggi) Nomor Panggil: MM64.4 Non-tandon: 1 (dapat dipinjam: 0) Tandon: tidak ada

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Isi artikel

Low carbon steel (AISI 1005) was coated by hot-dipping into a molten Al-10% Si bath at 700 °C for 18s. After hot-dipping treatment, the coating layers consisted of Al, Si, FeAl3, t5-Fe2Al8Si, and Fe2Al5. The bare steel and the aluminum steel were isothermally oxidized at 700 °C in ethanol combustion product at atmospheric pressure for 49 h. The aluminum steel shows good performance in high temperature oxidation because the formation of Al2O3 layer on the coating surface. The growth of iron oxide nodules on the surface coating was accelerated by rapid outward diffusion of Fe-ions due to the presence of H2O-vapour generated by ethanol combustion. Thus, the oxidation rate of aluminum steel increased, resulting in a substantial mass-gain as the oxidation time increased. After longer exposure, the t1-(Al,Si)5Fe3 phase was completely transformed to the FeAl in the outer layer. The FeAl formed near the steel substrate was due to Fe-atoms diffusing into the Fe2Al5 layer when the time and temperature increased.

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