High temperature oxidation in boiler environment of chromized steel

F, Farah Alia and Kurniawan, Tedi and Asmara, Yuli Panca and Ani, Mohd Hanafi and Nandiyanto, Asep Bayu Dani and UNSPECIFIED (2017) High temperature oxidation in boiler environment of chromized steel. In: 4th International Conference on Mechanical Engineering Research, ICMER 2017, 1-2 Aug 2017, Kuantan, Pahang.

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Abstract

The demand for increasing efficiency has led to the development and construction of higher operating temperature power plant. This condition may lead to more severe thickness losses in boiler tubes due to excessive corrosion process. Hence, the research to improve the corrosion resistance of the current operated material is needed so that it can be applied for higher temperature application. In this research, the effect of chromizing process on the oxidation behaviour of T91 steel was investigated under steam condition. In order to deposit chromium, mixture of chromium (Cr) powder as master alloy, halide salt (NH4Cl) powder as activator and alumina (Al2O3) powder as inert filler were inserted into alumina retort together with the steel sample and heated inside furnace at 1050oC for ten hours under argon gas environment. Furthermore, for the oxidation process, steels were exposed at 700oC at different oxidation time (6h-24h) under steam condition. From FESEM/EDX analysis, it was found that oxidation rate of pack cemented steel was lower than the un-packed steel. These results show that Cr from chromizing process was able to become reservoir for the formation of Cr2O3 in high temperature steam oxidation, and its existence can be used for a longer oxidation time.

Item Type:	Conference or Workshop Item (Plenary Papers)
Additional Information:	4583/60667
Uncontrolled Keywords:	Boiler environments, Chromizing process, Corrosion process, High temperature, Operating temperature, Oxidation behaviours, Oxidation process, Temperature applications
Subjects:	T Technology > TA Engineering (General). Civil engineering (General) > TA401 Materials of engineering and construction
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button):	Kulliyyah of Engineering > Department of Manufacturing and Materials Engineering
Depositing User:	Dr Mohd Hanafi Ani
Date Deposited:	28 Dec 2017 18:50
Last Modified:	16 Mar 2018 09:24
URI:	http://irep.iium.edu.my/id/eprint/60667

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