Sugiyanto, Sugiyanto and Badaruddin, Mohammad DEGRADATION OF MILD STEEL IN ETHANOL BURNING ENVIRONMENT: OXIDATION KINETICS AND MICROSTRUCTURAL ASPECT. https://www.geomatejournal.com/.

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Abstract

The isothermal oxidation of an AISI 1005 steel (mild steel) in water vapour and CO2 mixtures containing environments resulted from ethanol combustion had been investigated for exposure times ranging from 1 hour to 49 hours at elevated temperatures (700 °C, 750 °C and 800 °C). The steel was also oxidized in dry air for comparison. In water vapour and CO2 environments, mild steel underwent a significant degradation in term of the oxidation kinetics compared with those of steel oxidized in dry air environment. This finding is supported by a lower activation energy for steel oxidized in ethanol combustion products (199 kJ/mol) than that of for steel oxidized in dry air (224 kJ/mol). In addition, the breakaway oxidation was found for the steel subjected to ethanol combustion products at 800 °C. The carbon deposited in the magnetite layer was believed to lead the breakaway oxidation after an exposure time for 4 hours. A typical iron oxide growing on steel oxidized in ethanol combustion product is a pyramidal grain structures with compact scale but in dry air environment the iron rich oxide growing on the steel surface is a wrinkle characteristic displaying hollow structures at 700 °C and rough-grained oxide structures at 750–800 °C.

Item Type: Other
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
Divisions: Fakultas Teknik (FT) > Prodi Teknik Mesin
Depositing User: Dr. SUGIYANTO ,M.T.
Date Deposited: 11 May 2020 03:00
Last Modified: 11 May 2020 03:00
URI: http://repository.lppm.unila.ac.id/id/eprint/19547

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