Mohammad, Badaruddin and Ahmad, Yudi Eka Risano and Herry, Wardono and Dwi, Asmi (2017) Hot-corrosion of AISI 1020 steel in a molten NaCl/Na2SO4 eutectic at 700°C. AIP Conf. Proc, 1788 (030066). 030066-1-030066-9. ISSN 978-0-7354-1452-5


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Hot-corrosion behavior and morphological development of AISI 1020 steel with 2 mg cm−2 mixtures of various NaCl/Na2SO4 ratios at 700°C were investigated by means of weight gain measurements, Optical Microscope (OM), X-ray diffraction (XRD), scanning electron microscopy (SEM), and energy dispersive X-ray spectroscopy (EDS). The weight gain kinetics of the steel with mixtures of salt deposits display a rapid growth rates, compared with the weight gain kinetics of AISI 1020 steel without salt deposit in dry air oxidation, and follow a steady-state parabolic law for 49h. Chloridation and sulfidation produced by a molten NaCl/Na2SO4 on the steel induced hot-corrosion mechanism attack, and are responsible for the formation of thicker scale. The most severe corrosion takes place with the 70 wt.% NaCl mixtures in Na2SO4. The typical Fe2O3 whisker growth in outer part scale was attributed to the FeCl3 volatilization. The formation of FeS in the innermost scale is more pronounced as the content of Na2SO4 in the mixture is increased.

Item Type: Article
Uncontrolled Keywords: AISI 1020 steel, NaCl/Na2SO4, Chloridation, sulfidation
Subjects: T Technology > TJ Mechanical engineering and machinery
Divisions: Fakultas Teknik (FT) > Prodi Magister Teknik Mesin
Depositing User: HERRY WARD
Date Deposited: 12 Jun 2017 02:08
Last Modified: 12 Jun 2017 02:08

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