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Surface characterisation and corrosion behaviour of oxide layer for SLMed-316L stainless steel

W. S., Wan Harun and R. I. M., Asri and F. R. M., Romlay and S., Sharif and N. H. M., Jan and F., Tsumori (2018) Surface characterisation and corrosion behaviour of oxide layer for SLMed-316L stainless steel. Journal of Alloys and Compounds, 748. pp. 1044-1052. ISSN 0925-8388 (print), 1873-4669 (online)

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Abstract

The stable oxide layer formed through thermal oxidation (TO) process on selective laser melted 316 L stainless steel (SLMed-316 L SS) substrate surface attested to assists in refining their corrosion resistance and observed to behave relatively inert in physiological conditions. The surface characterisation and corrosion behaviour of the oxidised SLMed-316 L SS are the primary focus of this study. The formation of the oxide layer on SLMed-316 L SS was investigated at constant ambient atmosphere and 700 °C temperature for three different soaking times (150, 200 and 250 h). The surface characterisation of the oxide layer was performed using Field Emission Scanning Electron Microscope (FESEM), Energy Dispersive X-ray Spectroscopy (EDX) and X-ray Diffraction (XRD) to correlate the thickness of oxide layer and surface morphology after the TO treatment. Whereas, the electrochemical analysis was conducted using potentiodynamic polarisation to investigate the corrosion behaviour of the oxide layer. The finding disclosed an increase in the oxide layer thickness formation at prolonged exposure in ambient atmosphere. Also, the TO at 150 h showed an improved corrosion behaviour due to the presence of Fe2O3 and Cr2O3 layers. However, the extended soaking time showed no improvement towards the corrosion behaviour.

Item Type: Article
Uncontrolled Keywords: Selective laser melting; 316L stainless steel; Oxide layer; Thermal oxidation; Corrosion behavior; Additive manufacturing
Subjects: T Technology > TJ Mechanical engineering and machinery
Faculty/Division: Faculty of Mechanical Engineering
Depositing User: Mrs. Neng Sury Sulaiman
Date Deposited: 03 Dec 2018 08:54
Last Modified: 03 Dec 2018 08:54
URI: http://umpir.ump.edu.my/id/eprint/22987
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