scholarly journals The electrochemical impedance spectroscopy of silver doped hydroxyapatite coating in simulated body fluid used as corrosive agent

2012 ◽  
Vol 77 (11) ◽  
pp. 1609-1623 ◽  
Author(s):  
Ana Jankovic ◽  
Sanja Erakovic ◽  
Antonija Dindune ◽  
Djordje Veljovic ◽  
Tatjana Stevanovic ◽  
...  
Keyword(s):  
Electrochemical Impedance Spectroscopy ◽  
Impedance Spectroscopy ◽  
Simulated Body Fluid ◽  
Body Fluid ◽  
Electrochemical Impedance ◽  
Corrosion Behaviour ◽  
Attenuated Total Reflection ◽  
Precipitation Method ◽  
Corrosion Stability ◽  
Biomedical Material

Titanium is a key biomedical material due its good biocompatibility, mechanical properties and corrosion stability, but infections of the implantation site still pose serious threat. One approach to prevent infection is to improve antimicrobial ability of the coating material. Silver doped hydroxyapatite (Ag/HAP) nanoparticles were synthesized by new modified precipitation method. The synthesized powder was used for preparation of Ag/HAP coating on titanium by electrophoretic deposition. The coating was characterized in terms of phase composition and structure by Attenuated total reflection Fourier transform infrared spectroscopy (ATR-FTIR) and X-ray diffraction (XRD); surface morphology and chemical composition was assessed using scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS). Research focused on evaluation of the corrosion behaviour of Ag/HAP coating in simulated body fluid (SBF) at 37 ?C during prolonged immersion time by electrochemical impedance spectroscopy (EIS). Silver doped HAP coating provided good corrosion protection in SBF solution.

The Manipulation of Properties of Ti Bioalloys at Micro and Nanoscale Using Etching Procedures

2008 ◽  
Vol 396-398 ◽  
pp. 393-396 ◽  
Author(s):  
D. Ionita ◽  
Doina Raducanu ◽  
Mariana Prodana ◽  
Ioana Demetrescu
Keyword(s):  
Electrochemical Impedance Spectroscopy ◽  
Impedance Spectroscopy ◽  
Simulated Body Fluid ◽  
Body Fluid ◽  
Electrochemical Impedance ◽  
Corrosion Behaviour ◽  
Open Circuit ◽  
Electrochemical Study ◽  
Acid Etching ◽  
Equivalent Circuits

The paper is an electrochemical study regarding the influence of different acid etching conditions on the corrosion behaviour of a new Ti based bioalloy with Nb, Ta and Zr. Open circuit, potentiodynamic and electrochemical impedance spectroscopy were the methods performed in a simulated body fluid (SBF) and a stability mechanism was discussed in terms of equivalent circuits.

Investigation of corrosion behavior of polypyrrole-coated Ti using dynamic electrochemical impedance spectroscopy (DEIS)

RSC Advances ◽  
2016 ◽  
Vol 6 (83) ◽  
pp. 80275-80285 ◽  
Author(s):  
Bhavana Rikhari ◽  
S. Pugal Mani ◽  
N. Rajendran
Keyword(s):  
Electrochemical Impedance Spectroscopy ◽  
Impedance Spectroscopy ◽  
Simulated Body Fluid ◽  
Corrosion Behavior ◽  
Body Fluid ◽  
Electrochemical Impedance ◽  
Sbf Solution ◽  
Dynamic Electrochemical Impedance Spectroscopy

In the present work, dynamic electrochemical impedance spectroscopy (DEIS) was used to investigate the corrosion behavior of polypyrrole (PPy)-coated titanium (Ti) in simulated body fluid (SBF) solution.

Dynamic electrochemical impedance spectroscopy (DEIS) studies of AZ31 magnesium alloy in simulated body fluid solution

RSC Advances ◽  
2014 ◽  
Vol 4 (53) ◽  
pp. 27791-27795 ◽  
Author(s):  
A. Srinivasan ◽  
Kwang Seon Shin ◽  
N. Rajendran
Keyword(s):  
Electrochemical Impedance Spectroscopy ◽  
Magnesium Alloy ◽  
Impedance Spectroscopy ◽  
Simulated Body Fluid ◽  
Body Fluid ◽  
Electrochemical Impedance ◽  
Simulated Body Fluid Solution ◽  
Az31 Magnesium Alloy ◽  
Fluid Solution ◽  
Dynamic Electrochemical Impedance Spectroscopy

The change in impedance values as a function of potential indicated the transformation of Mg from its passive to active state.

scholarly journals Synthesis and characterization of sintered hydroxyapatite/lignin coatings on titanium

2012 ◽  
Vol 66 (2) ◽  
pp. 187-192
Author(s):  
Rade Surudzic ◽  
Sanja Erakovic ◽  
Vesna Miskovic-Stankovic
Keyword(s):  
Simulated Body Fluid ◽  
Body Fluid ◽  
Open Circuit Potential ◽  
Electrochemical Impedance ◽  
Open Circuit ◽  
Constant Voltage ◽  
Corrosion Stability ◽  
Similar Chemical ◽  
Titanium Surfaces

In order to improve corrosion stability and biocompatibility of titanium surfaces, hydroxyapatite (Ca10(PO4)6(OH)2, HAP) has been used as coating material due to the fact that it possess similar chemical composition as bone tissue. Lignin?s (Lig) usage in medical applications could be interesting because it could lead to thermal stability, hydrophilicity, biocompatibility and biodegradability of different materials. Bioceramic hydroxyapatite/lignin (HAP/Lig) coatings on titanium were obtained from ethanol suspension by electrophoretic deposition method. The uniform and compact HAP/Lig coatings were deposited at constant voltage of 60 V for 45 s and sintered at 900?C in argon atmosphere. The corrosion stability of sintered HAP/Lig coatings in simulated body fluid (SBF) at 37?C was investigated by open circuit potential-time measurements and electrochemical impedance spectroscopy (EIS). The greater values of open circuit potential, as well as EIS results, indicated improved corrosion resistance and good corrosion stability of HAP/Lig coatings in simulated body fluid at 37?C .

In Vitro Evaluation of Degradation of Biodegradable Silane Based Coating on Mg-Zn-Ca Alloy in a Physiological Environment

2013 ◽  
Vol 765 ◽  
pp. 803-807
Author(s):  
Gaur Swati ◽  
Anand Sawroop Khanna ◽  
Raghuvir Kumar Singh Raman
Keyword(s):  
Corrosion Resistance ◽  
Electrochemical Impedance Spectroscopy ◽  
Magnesium Alloy ◽  
Impedance Spectroscopy ◽  
Body Fluid ◽  
Degradation Rate ◽  
Electrochemical Impedance ◽  
Silane Coating ◽  
Corrosion Barrier

In the present study, combinations of a phosphonato silane with a precursor, Methyltriethoxy silane (MTEOS) in various ratios were applied onto the alloy Mg-6Zn-Ca. The corrosion resistance of the coated and uncoated specimens in a modified simulated body fluid (m-SBF) was characterized by potentiodynamic polarization and electrochemical impedance spectroscopy (EIS). Results suggest that the silane coating significantly decreases the degradation rate of the magnesium alloy, indicating its potential to be used as a corrosion barrier for magnesium alloy temporary implants.

Sign in / Sign up

Export Citation Format

Share Document