Badaruddin, Mohammad and Sugiyanto, Sugiyanto and Asmi, Dwi (2019) High-temperature corrosion of aluminized-AISI 1020 steel with NaCl and Na2SO4 deposits. Bulletin of Materials Science, 43 (1). 0-11. ISSN 0973-7669

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Official URL: https://link.springer.com/journal/12034

Abstract

High-temperature corrosion of aluminized-American Iron and Steel Institute (AISI) 1020 steel with sodium chloride (NaCl) and sodium sulphate (Na2SO4) deposits was studied using isothermal oxidization in a dry air environment at 700∘C for 49 h. NaCl and Na2SO4 deposits on the aluminide layer interfered with protective alumina/aluminium oxide (Al2O3) scale formation on the steel substrate. Chlorine and sulphur gases (Cl2g and Sg, respectively) released into the atmosphere corroded the protective Al2O3 layer. Corrosion of the Al2O3 layer was also due to local formation of iron oxide (Fe2O3). Fe2O3 growth is attributed to ferric chloride (FeCl3) vaporization. Sg diffusion into the Al2O3 scale via Al3+ vacancy defects led to the formation of aluminium sulphide on the aluminide layer surface. Cl and S consequently induced hot corrosion of the aluminized steel, thereby increasing cyclic oxychloridation and sulphidation rates at high temperatures.

Item Type: Article
Subjects: T Technology > TJ Mechanical engineering and machinery
Divisions: Fakultas Teknik (FT) > Prodi Teknik Mesin
Depositing User: MOHAMMAD B
Date Deposited: 17 Feb 2020 03:49
Last Modified: 17 Feb 2020 03:49
URI: http://repository.lppm.unila.ac.id/id/eprint/17900

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