TY - JOUR
T1 - Surface characterisation and corrosion behaviour of oxide layer for SLMed-316L stainless steel
AU - Harun, W. S.W.
AU - Asri, R. I.M.
AU - Romlay, F. R.M.
AU - Sharif, S.
AU - Jan, N. H.M.
AU - Tsumori, F.
N1 - Funding Information:
This study was fully supported by Research Acculturation Grant Scheme ( Ministry of Higher Education, Malaysia RDU151404 ), Qatar National Research Fund NPRP8-876-2-375 ( UIC161504 ) and internal grants of Universiti Malaysia Pahang ( RDU140354 , RDU160337 & RDU170320 ).
Publisher Copyright:
© 2018 Elsevier B.V.
PY - 2018/6/5
Y1 - 2018/6/5
N2 - 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.
AB - 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.
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U2 - 10.1016/j.jallcom.2018.03.233
DO - 10.1016/j.jallcom.2018.03.233
M3 - Article
AN - SCOPUS:85044481009
SN - 0925-8388
VL - 748
SP - 1044
EP - 1052
JO - Journal of Alloys and Compounds
JF - Journal of Alloys and Compounds
ER -