Also, the formation of MoO2 helps in improving better corrosion resistance. XPS spectra confirms the formation of the passive film containing chromium oxide and hydroxides. X-ray photoelectron spectroscopy (XPS) was executed to analyze the passive film formed in the solution of HA and NaCl on 316L SS.
EIS result agrees with the findings of potentiodynamic polarization tests. This is due to the adhesion property of the HA on the sample surface. Also, in pure NaCl solution, the corrosion current density (i corr) increased as compared to bare HA and HA  +  NaCl. Whereas, with the addition of NaCl to HA the solution, the corrosion resistance of the sample was enhanced. With the increase in HA concentration, corrosion rate increases. For the electrochemical tests, potentiodynamic polarization test and electrochemical impedance spectroscopy (EIS) were undertaken. 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). Patil, Awanikumar P.ĭue to low cost and easily available material, 316L stainless steel (SS) is used for biomedical implants.
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This may be because the use of a low-power generator cannot sufficiently exploit the potential advantage of better tissue conductivity provided by NaCl perfusion.« lessĮffect of concentration of hyaluronic acid and NaCl on corrosion behavior of 316L austenitic stainless steelīansod, Ankur V. In an ex vivo model, continuous perfusion with high NaCl concentrations does not significantly improve the volume of thermal-induced coagulation. A correlation was found between the NaCl concentration and the short-axis diameter of coagulation (r = 0.64) and between the NaCl concentration and the mean temperature (r = 0.67), but not between the NaCl concentration and volume of coagulation. Volume of coagulation, short-axis diameter, and amount of energy did not differ significantly among NaCl concentrations (p > 0.5). RF ablation performed with 0.9% to 25% concentrations of NaCl produced a mean volume of coagulation of 30.7 12.8 deg. Correlations were calculated according to the Spearmanmore » test.
These parameters were compared using the nonparametric Mann-Whitney test. Temperature, the amount of energy, and the dimensions of thermal-induced white coagulation were assessed for each ablation.
For perfusion, NaCl concentrations ranging from 0 (demineralized water) to 25% were used. Twenty-eight RF ablations were performed with 40 W for 10 min using continuous NaCl infusion in fresh excised bovine liver. To determine, by means of an ex vivo study, the effect of different NaCl concentrations on the extent of coagulation obtained during radiofrequency (RF) ablation performed using a digitally controlled perfusion device. Influence of NaCl Concentrations on Coagulation, Temperature, and Electrical Conductivity Using a Perfusion Radiofrequency Ablation System: An Ex Vivo Experimental StudyĪube, Christophe, E-mail: Schmidt, Diethard Brieger, Jens
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