Comparative study of corrosion and tribocorrosion resistance of some biomaterials

2012 ◽  
Vol 1464 ◽  
Author(s):  
J. Takadoum ◽  
J. El Mansouri ◽  
S. Ivanescu ◽  
D. Stanciu
Keyword(s):  
Material Removal ◽  
Detrimental Effect ◽  
Open Circuit Potential ◽  
Saline Solution ◽  
Open Circuit ◽  
Nacl Solution ◽  
Passivating Film ◽  
Ringer’S Solution ◽  
Phosphate Buffered Saline ◽  
Alumina Ball

ABSTRACTCorrosion and tribocorrosion tests have been conducted on titanium, Ti-6Al-4V and Ti-10Zr-10Nb-5Ta alloys. The experiments have been conducted in four different electrolytes: NaCl solution, Ringer’s solution, phosphate buffered saline solution (PBS) with and without an addition of bovine serum albumin (BSA).The electrochemical study showed that, whatever the electrolyte, the passivating film formed on Ti-10Zr-10Nb-5Ta surface is more stable than those obtained on the surface of titanium or Ti-6Al-4V alloy. In addition, Ti-10Zr-10Nb-5Ta presents a better resistance to corrosion. In PBS solution, open circuit potential (OCP) moved to more positive value in comparison with results obtained in NaCl and Ringer’s solutions, whereas addition of BSA moved OCP value towards more negative potential indicating a detrimental effect.Tribocorrosion tests have been conducted at OCP when sliding against an alumina ball. Friction coefficient, current and volume of material removal at the end of tests have been measured and the results discussed. The influence of the presence of proteins molecules has been particularly analyzed.

scholarly journals Effects of Alloying Elements on the Corrosion Behavior of Sputter–deposited Zr–(12–21)Cr–W Alloys in 0.5 M NaCl Solution

1970 ◽  
Vol 25 ◽  
pp. 75-82
Author(s):  
Basu Ram Aryal ◽  
Jagadeesh Bhattarai
Keyword(s):  
Corrosion Test ◽  
Open Circuit Potential ◽  
Chemical Society ◽  
Open Circuit ◽  
Sputter Deposition ◽  
Nacl Solution ◽  
Corrosion Rates ◽  
Sputter Deposited ◽  
Stable Passivity ◽  
Zirconium Metal

The synergistic effect of the simultaneous additions of tungsten and zirconium in thesputter-deposited amorphous or nanocrystalline Zr-(12-21)Cr-W alloys is studied in 0.5 MNaCl solution open to air at 25°C using corrosion tests and open circuit potentialmeasurements. Corrosion rates of the sputter-deposited Zr-(12-21)Cr-W alloys containing10-80 at % tungsten (that is, 0.95-1.85 x 10-2 mm.y-1) are more than one order of magnitudelower than that of the sputter-deposited tungsten and even lower than those of zirconium aswell as chromium in 0.5 M NaCl solution. The addition of 8-73 at % zirconium content inthe sputter-deposited binary W-(12-21)Cr alloys seems to be more effective to improve thecorrosion-resistant properties of the sputter-deposited ternary Zr-Cr-W alloys containing12-21 at % chromium in 0.5 M NaCl solution. The sputter-deposited Zr-(17-21)Cr-W alloyscontaining an adequate amounts of zirconium metal showed the more stable passivity andshowed higher corrosion resistance than those of alloy-constituting elements in 0.5 M NaClsolution open to air at 25°C.Keywords: Zr-(12-21)Cr-W alloys, sputter deposition, corrosion test, open circuit potential,0.5 M NaCl.DOI:  10.3126/jncs.v25i0.3305Journal of Nepal Chemical Society Volume 25, 2010 pp 75-82

Effect of Different Dopants in Films TEOS/MPTS Used to Protect the Carbon Steel

2014 ◽  
Vol 805 ◽  
pp. 167-171 ◽  
Author(s):  
F.S. Silva ◽  
P.H. Suegama ◽  
W.P. Silva ◽  
A.W. Rinaldi ◽  
N.L.C. Domingues ◽  
...  
Keyword(s):  
Carbon Steel ◽  
Open Circuit Potential ◽  
Hybrid Film ◽  
Electrochemical Impedance ◽  
Open Circuit ◽  
The Other ◽  
Nacl Solution ◽  
Hybrid Films ◽  
Impedance Measurements ◽  
Current Densities

Schiff bases m-toluene N-Salicylideneaniline (m-TOL), (B) m-nitro-N- Salicylideneaniline (m-NTR) and (C) m-methoxy-N-salicylideneaniline (m-MTX) and cerium ions were studied added to 3.5 wt.% NaCl solution and added to the hybrid film based tetraethoxysilane (TEOS) e 3-methacryloxypropyltrimethoxysilane (MPTS). The polarization measurements showed lower current densities for the steel in NaCl with m-MTX, indicating that the m-MTX may be acting as an inhibitor. The hybrid films were doped with the m-MTX, Ce (III) or Ce (IV). Electrochemical measurements of open circuit potential (EOC), polarization curves and electrochemical impedance spectroscopy (EIS), were used to evaluate the corrosion behavior of the hybrid films. According Electrochemical Impedance measurements, all hybrid films, provided protection to the carbon steel. The films doped with Ce (IV), provided greater protection than the other, which indicates that this is the most suitable dopant for use in films.

Corrosion Behavior of Alloys for Hot Dipping

2013 ◽  
Vol 634-638 ◽  
pp. 2935-2938
Author(s):  
You Bin Wang ◽  
Jian Min Zeng
Keyword(s):  
Open Circuit Potential ◽  
Electrochemical Impedance ◽  
Open Circuit ◽  
Corrosion Property ◽  
Nacl Solution ◽  
Low Frequencies ◽  
High Impedance ◽  
Relaxation Time Constants ◽  
Phase Angles ◽  
Good Agreement

The corrosion property of three currently used hot dipped alloys (Al-8Si, Zn-0.6Ni and 55Al-Zn-Si) immersed in 3.5% NaCl solution were studied by analyzing the open circuit potential variation with time and electrochemical impedance spectroscopy (EIS) tests. The open circuit potential of the Al-8Si alloy is 100mV higher than the potential of Zn-0.6Ni and 55Al-Zn-Si, and the potential of Zn-0.6Ni is approach to the 55Al-Zn-Si alloy. The phase angles of the Al-8Si, 55Al-Zn-Si and Zn-0.6Ni are close to -80°,-70°,-60°, and the high impedance values at low frequencies are 105,104,103 Ω cm2, respectively. The EIS spectra of the alloys indicated two relaxation time constants. An “equivalent circuit” with the circuit elements representing the electrochemical properties was proposed to simulate the EIS spectra, and the simulated dates were in a good agreement with the experiment dates. The polarization resistance (Rp) of Al-8Si, 55Al-Zn-Si and Zn-0.6Ni are 18000, 2010, 251 Ω•cm-2, respectively. The results showed that the corrosion property of Al-8Si is well than the other alloys in the test solution.

scholarly journals The Estimation of Corrosion Behavior of NiTi and NiTiNb Alloys Using Dynamic Electrochemical Impedance Spectroscopy

2013 ◽  
Vol 2013 ◽  
pp. 1-7 ◽  
Author(s):  
Georgiana Bolat ◽  
Daniel Mareci ◽  
Sorin Iacoban ◽  
Nicanor Cimpoesu ◽  
Corneliu Munteanu
Keyword(s):  
Open Circuit Potential ◽  
Electrochemical Impedance ◽  
Layer Structure ◽  
Passive Layer ◽  
Open Circuit ◽  
Impedance Spectra ◽  
Nacl Solution ◽  
Polarization Test ◽  
Dynamic Electrochemical Impedance Spectroscopy ◽  
Electrochemical Impedance Spectroscopic

Linear anodic potentiodynamic polarization and dynamic electrochemical impedance spectroscopic (DEIS) measurements were carried out for NiTi and NiTiNb alloys in physiological 0.9 wt% NaCl solution in order to assess their corrosion resistance. DEIS measurements were performed from open circuit potential to dissolution potential. It was shown that the impedance measurements in potentiodynamic conditions allow simultaneous investigation of changes in passive layer structure. The impedance spectra of various potential regions were fitted and also discussed. The surface morphology of the alloys after linear anodic polarization test was studied using scanning electron microscopy (SEM) technique.

scholarly journals Corrosion behavior of AH-36 steel in seawater

2020 ◽  
Vol 63 (9) ◽  
pp. 113-118
Author(s):  
Van Chi Nguyen ◽  
◽  
Nhat Linh Cao ◽  
Van Kien Dong ◽  
Hong Quan Le ◽  
...  
Keyword(s):  
Corrosion Behavior ◽  
Open Circuit Potential ◽  
Surface Passivation ◽  
Sample Surface ◽  
Open Circuit ◽  
Corrosion Process ◽  
Anodic Process ◽  
Natural Seawater ◽  
Nacl Solution ◽  
Over Time

In the present work, the corrosion behavior of AH-36 steel in 3% NaCl aqueous solution and natural seawater was studied using a three-electrode cell, Autolab PGSTAT 204N, and Nova 2.0 software by electrochemical methods. It has been established that after contact of the steel with chloride-containing media, the open circuit potential of steel shifts sharply to the negative region, which indicates a decrease in the corrosion resistance of steel in chloride-containing media. In seawater, the stabilization of the open circuit potential is observed within 60 min, and in NaCl solution – 120 min. The constant value of the open circuit potential of steel in seawater is in a more negative range compared to the constant value of the open circuit potential of steel in NaCl solution. In order to study the kinetics of the corrosion process of steel, polarization curves were obtained in the potentiostatic mode. It is shown that the corrosion potentials and currents of the samples decrease over time and tend to constant values. In all cases, the corrosion process in seawater occurs and stabilizes (within 20 min) faster than in NaCl solution. The anode Tafel coefficient takes a value in the range of 0.1-0.2 V, which may indicate the same mechanism of the anodic process. As a result of full-scale tests (Nha Trang, Vietnam), it can be seen that the steel samples are strongly susceptible to corrosion at the initial stage and over time the corrosion rate decreases and tends to a constant value (0.27 g/m2.h). This is due to the sample surface passivation during corrosion tests.

scholarly journals Roles of alloying elements on the corrosion behavior of sputter-deposited amorphous W-Cr-Zr alloys in 0.5m NaCl solution

1970 ◽  
Vol 9 (9) ◽  
pp. 34-38
Author(s):  
Jagadeesh Bhattarai
Keyword(s):  
Open Circuit Potential ◽  
Synergistic Effects ◽  
Open Circuit ◽  
Sputter Deposition ◽  
Nacl Solution ◽  
Dc Magnetron Sputtering ◽  
Corrosion Rates ◽  
Order Of Magnitude ◽  
Sputter Deposited ◽  
Zr Alloys

Ternary amorphous W–xCr–yZr alloys containing 9--38 at % tungsten, 15--42 at % chromium and 39--73 at % zirconium were successfully prepared by direct current (DC) magnetron sputtering technique. The corrosion rates of all the examined sputter-deposited W–xCr–yZr alloys were in the range of 1 × 10−3 mm/y or lower which are nearly one order of magnitude lower than those of the sputter-deposited tungsten, chromium and zirconium metals after immersion for 240 h in 0.5 M NaCl solution open to air at 25°C. In particular, the simultaneous additions of tungsten, chromium and zirconium to the amorphous ternary W–xCr–yZr alloys in the chromium- and zirconium-enriched W--91Cr and W--88Zr alloys, respectively, showed a synergistic effects for showing the higher corrosion resistance than those of binary WCr and W--Zr alloys in neutral NaCl solution. Keywords: W–Cr–Zr alloys; Sputter deposition; Corrosion test; Open circuit potential; 0.5 M NaCl DOI: http://dx.doi.org/10.3126/sw.v9i9.5515SW 2011; 9(9): 34-38

scholarly journals Influence of the Chemical Composition in the Electrochemical Response of Permanent Magnets

2015 ◽  
Vol 2015 ◽  
pp. 1-16 ◽  
Author(s):  
S. Godavarthi ◽  
J. Porcayo-Calderon ◽  
E. Vazquez-Velez ◽  
M. Casales-Diaz ◽  
D. M. Ortega-Toledo ◽  
...  
Keyword(s):  
Chemical Composition ◽  
Room Temperature ◽  
Permanent Magnets ◽  
Open Circuit Potential ◽  
Electrochemical Impedance ◽  
Open Circuit ◽  
Nacl Solution ◽  
Main Mode ◽  
Linear Polarization Resistance ◽  
Co Addition

The corrosion behavior of permanent magnets with different chemical composition was evaluated. Permanent magnets were tested in 3.5% NaCl solution at room temperature using electrochemical technics such as polarization curves, open-circuit potential, linear polarization resistance, and electrochemical impedance spectroscopy measurements. Results have shown that corrosion rate is affected by Nd, Pr, and Co content. Analysis by scanning electron microscopy has shown that pitting attack is the main mode of degradation of the magnets, while Co addition reduces it and Pr addition increases it.

Role of Hydrogen in Cavitation Degradation of Iron in Water Solutions

2014 ◽  
Vol 225 ◽  
pp. 59-64
Author(s):  
Jarosław Chmiel ◽  
Ellina Łunarska
Keyword(s):  
Open Circuit Potential ◽  
Hydrogen Permeation ◽  
Open Circuit ◽  
Permeation Rate ◽  
Nacl Solution ◽  
Dynamic Stresses ◽  
Unstressed State ◽  
Metal Deformation ◽  
Deformation Hardening

Hydrogen ingress into a metal has been observed at cavitation in distilled water and in 3% NaCl solution at open circuit potential. The measurements of hydrogen permeation rate have been made using an ultrasonic cavitation facility with an attached Devanathan-Stachurski double cell. Increase in vibration amplitude has been associated with the increase in amplitude of electrochemical voltage and current pulses and with the modification of hydrogen permeation rate. Hydrogen behavior within the metal has been affected by the cavitation induced dynamic stresses and metal deformation hardening, ascertained on the basis of the appearance of hydrogen permeation transients at cavitation in comparison with those recorded for the unstressed state. Metal damage has been a resultof associated effects of cavitation and hydrogen.

scholarly journals An Electrochemical Study to Evaluate the Effect of Calcium Nitrite Inhibitor to Mitigate the Corrosion of Reinforcement in Sodium Chloride Contaminated Ca(OH)2Solution

2017 ◽  
Vol 2017 ◽  
pp. 1-14 ◽  
Author(s):  
Hwa-Sung Ryu ◽  
Jitendra Kumar Singh ◽  
Han-Seung Lee ◽  
Won-Jun Park
Keyword(s):  
Electrochemical Impedance Spectroscopy ◽  
Sodium Chloride ◽  
Anodic Polarization ◽  
Open Circuit Potential ◽  
Electrochemical Impedance ◽  
Open Circuit ◽  
Nacl Solution ◽  
Steel Rebar ◽  
Calcium Nitrite ◽  
Corrosion Of Steel

The effect of calcium nitrite (Ca(NO2)2) was assessed by electrochemical means such as open circuit potential (OCP), electrochemical impedance spectroscopy (EIS), and potentiodynamic studies in saturated Ca(OH)2solution contaminated with 0.99 and 7.91 g/L NaCl. The preliminary results of OCP showed that the potential is shifted towards positive (noble) side as content of inhibitor increased. The EIS results indicate that Ca(NO2)2works effectively in reduction and initiation of corrosion of steel rebar in NaCl contaminated Ca(OH)2solution. Potentiodynamic studies revealed the pitting tendency of steel rebar exposed in 0.99 g/L NaCl at [Cl−/NO2-] = 1.2 attributed to low conductivity of passive film which causes interference for Cl−ions attack during anodic polarization. The 85.75% efficiency is found in 0.99 g/L at [Cl−/NO2-] = 1.2. The Ca(NO2)2inhibitor transformed the unstable iron oxides/hydroxides into stable and protective oxides/hydroxides due to its strong oxidizing nature. Therefore, this inhibitor is sufficiently and significantly reducing the corrosion of steel rebar at even its low concentration with 0.99 and 7.91 g/L NaCl solution.

scholarly journals Electrochemical Performance of Ti-Based Commercial Biomaterials

2019 ◽  
Vol 2019 ◽  
pp. 1-15 ◽  
Author(s):  
E. Porcayo-Palafox ◽  
S. I. Carrera-Chavez ◽  
S. R. Casolco ◽  
J. Porcayo-Calderon ◽  
V. M. Salinas-Bravo
Keyword(s):  
Polarization Resistance ◽  
Open Circuit Potential ◽  
Electrochemical Impedance ◽  
Open Circuit ◽  
Titanium Implants ◽  
Nacl Solution ◽  
Linear Polarization Resistance ◽  
Potentiodynamic Polarization Curves ◽  
Commercially Pure ◽  
Thermomechanical Processes

In order to determine the electrochemical behavior against the corrosion of different commercial biomaterials, in this study the results of the evaluation of different titanium implants are reported. The commercial implants evaluated were purchased randomly with different suppliers. The different biomaterials were subjected to studies of potentiodynamic polarization curves, open circuit potential measurements, linear polarization resistance measurements, and electrochemical impedance spectroscopy measurements in a 0.9% NaCl solution. The results showed that the chemical composition of the biomaterials corresponds to commercially pure Ti or to the alloy Ti6Al4V. In addition, although all the biomaterials showed a high resistance to corrosion, notable differences were observed in their performance. These differences were associated with the thermomechanical processes during the manufacture of the biomaterial, which affected its microstructure.

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