TY  - JOUR
T1  - Increased Corrosion Resistance of Stainless Steel 316l Coated with Nanogold
Layers in Simulated Body Fluid (Hank’s Solution)
AU - Amnas, Hussein Sabea AU - Siyah, Murtdha Adhab AU - Moradian, Rostam AU - Manouchehri, Iraj 
JO  - Journal of Engineering and Applied Sciences
VL  - 14
IS  - 3
SP  - 789
EP  - 795
PY  - 2019
DA  - 2001/08/19
SN  - 1816-949x
DO  - jeasci.2019.789.795
UR  - https://makhillpublications.co/view-article.php?doi=jeasci.2019.789.795
KW  - Nanogold films
KW  -SS316L
KW  -biocorrosion
KW  -DC magnetron sputtering
KW  -treatment
KW  -resistance
AB  - This study aimed to increase the corrosion resistance of Stainless Steel 316L (SS316L) alloy used in
surgical implants and biomedicine by coating the alloy with nanogold layers. The morphology, particles size
and thickness of the gold coating were investigated by Scanning Electron Microscopy (SEM). Results showed
that the homogeneity of the coating layer increased after heat treatment. Cross-section SEM images revealed
that the SS316L alloy substrate was coated with a gold layer having a thickness of 1.46-2.34 μm. The particle
size of the gold coating was <20 nm and prepared by direct-current magnetron sputtering. X-ray diffraction
analysis of the samples coated with nanogold after heat treatment showed that the coating layers were
crystalline and that the diffraction peaks can be indexed to the face-centred cubic crystalline phase of Au.
Finally, results of the potentiodynamic polarisation curves of SS316L samples coated with gold layer showed
high resistance to corrosion. The corrosion rate decreased and the sample exhibited noble behaviours and
highest resistance to ion attack in SBF (Hank’s solution) than SS316L alloy without coating. The sample with
the highest resistance to corrosion in SBF was the one coated with gold having a thickness of 2.34 μm after heat
treatment at 500°C.
ER  -