Effect of concentration of hyaluronic acid and NaCl on corrosion behavior of 316L austenitic stainless steel. (10th November 2017)

• Record Type: Journal Article
• Authors: Bansod, Ankur V; Khobragade, Nilay N; Giradkar, Karansagar V; Patil, Awanikumar P
• Is Part Of: Materials research express. Volume 4:Number 11(2017)
• Publication Date: 2017-11-10
• Subjects: hyaluronic acid -- biomaterials (316L SS) -- adsorption -- x-ray photoelectron spectroscopy (XPS); Materials science -- Research -- Periodicals; Materials science -- Periodicals; 620.11
• DOI: 10.1088/2053-1591/aa94da
• Languages: English
• ISSNs: 2053-1591

Abstract

Abstract: Due to low cost and easily available material, 316L stainless steel (SS) is used for biomedical implants. The electrochemical corrosion behavior of 316L (SS) was studied as a function of the concentration of simulated biological fluid (hyaluronic acid), the influence of Cl − and the combined effect of NaCl and hyaluronic acid (HA). For the electrochemical tests, potentiodynamic polarization test and electrochemical impedance spectroscopy (EIS) were undertaken. With the increase in HA concentration, corrosion rate increases. Whereas, with the addition of NaCl to HA the solution, the corrosion resistance of the sample was enhanced. Also, in pure NaCl solution, the corrosion current density ( i corr ) increased as compared to bare HA and HA + NaCl. This is due to the adhesion property of the HA on the sample surface. EIS result agrees with the findings of potentiodynamic polarization tests. X-ray photoelectron spectroscopy (XPS) was executed to analyze the passive film formed in the solution of HA and NaCl on 316L SS. XPS spectra confirms the formation of the passive film containing chromium oxide and hydroxides. Also, the formation of MoO2 helps in improving better corrosion resistance. The peak of nitrogen was observed in the sample immersed in HA solution. Scanning electron microscope (SEM) was carried out to analyze the surface morphology.