A Novel Nano-Composite CSNPs/PVP/CoONPs Coating for Improving Corrosion Resistance of Ti-6Al-4V Alloy as a Dental Implant
Abstract
:1. Introduction
2. Experimental
2.1. Electrode and Cell Composition
2.2. Chemicals and Reagents with Nano-Coating Composite Preparation
2.3. Instrumentation
3. Results and Discussion
3.1. Coating Thickness Measurements
3.2. Surface Characterization
3.3. Electrochemical Impedance Spectroscopy (EIS) Measurements
3.4. Potentiodynamic Measurements
3.5. Microhardness Measurements
4. Conclusions
- The electrochemical corrosion resistance of Ti-6Al-4V alloy, either uncoated or coated with a CSNPs/PVP/CoONPs nano-coating after immersion in synthetic saliva solution at 37 °C, increased with immersion time, and the hydrogen evolution rate decreased, as observed via the polarization technique focused on the cathodic branch, by lowering its current value compared to the bare electrode. This was due to coating desorption and the formation of both TiO2 and Ti3O;
- The novel biocompatible nano-coating improved the electrochemical corrosion resistance of the Ti-6Al-4V alloy, and reached 90.87% protection efficiency, with a good microhardness of 387 Hv;
- Very low corrosion current density has been observed for the nano-coating of 12.589 nA·cm−2, compared to that of the bare alloy;
- Generally, it was a simple, cheap, and easy nano-polymer composite to prepare. It is an important novel nano-composite polymer coating that could be applied industrially;
- Finally, this work will be valuable in the development of a biocompatible implant in dentistry with excellent corrosion resistance.
Author Contributions
Funding
Data Availability Statement
Conflicts of Interest
References
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Electrodes | Time/h | Rs/Ω cm2 | R1/kΩ cm2 | α1 | Q1/μF cm−2 | R2/MΩ cm2 | Q2/μF cm−2 | α2 | R3/MΩ cm2 | C3/μF cm−2 |
---|---|---|---|---|---|---|---|---|---|---|
Ti-6Al-4V | 2.00 | 26.7 ± 0.51 | 801.1 ± 16 | 0.92 ± 0.01 | 13.1 ± 0.09 | - | - | - | - | - |
24.0 | 18.2 ± 0.49 | 1608 ± 31 | 0.94 ± 0.02 | 11.2 ± 0.09 | - | - | - | - | - | |
168 | 19.5 ± 0.48 | 1915 ± 44 | 0.96 ± 0.02 | 9.06 ± 0.12 | - | - | - | - | - | |
336 | 23.7 ± 0.58 | 2118 ± 49 | 0.96 ± 0.01 | 8.59 ± 0.161 | - | - | - | - | - | |
Ti alloy/CSNPs/PVP/CoONPs | 0.00 | 55.1 ± 0.33 | 0.026 ± 0.001 | 0.93 ± 0.02 | 8.4 ± 0.01 | 1.0 ± 0.52 | 3.5 ± 0.76 | 0.96 ± 0.02 | 2.8 ± 0.59 | 3.9 ± 0.15 |
6.00 | 53.3 ± 0.321 | 0.035 ± 0.001 | 0.93 ± 0.02 | 8.0 ± 0.05 | 2.7 ± 0.45 | 3.0 ± 0.68 | 0.94 ± 0.01 | 5.7 ± 0.59 | 3.4 ± 0.13 | |
12.0 | 54.6 ± 0.36 | 0.036 ± 0.003 | 0.94 ± 0.02 | 7.7 ± 0.11 | 2.9 ± 0.43 | 2.7 ± 0.59 | 0.95 ± 0.02 | 9.1 ± 0.46 | 3.3 ± 0.16 | |
24.0 | 55.1 ± 0.41 | 0.046 ± 0.002 | 0.95 ± 0.02 | 7.4 ± 0.03 | 3.3 ± 0.05 | 2.3 ± 0.74 | 0.96 ± 0.01 | 9.7 ± 0.48 | 3.2 ± 0.22 | |
96.0 | 56.2 ± 0.50 | 0.057 ± 0.003 | 0.94 ± 0.01 | 7.1 ± 0.03 | 4.1 ± 0.51 | 1.8 ± 0.15 | 0.95 ± 0.02 | 10.9 ± 0.47 | 3.0 ± 0.31 | |
168 | 53.9 ± 0.29 | 0.067 ± 0.001 | 0.95 ± 0.02 | 7.0 ± 0.01 | 4.6 ± 0.08 | 1.6 ± 0.25 | 0.96 ± 0.02 | 12.4 ± 0.39 | 2.9 ± 0.22 | |
240 | 54.6 ± 0.35 | 0.078 ± 0.005 | 0.95 ± 0.01 | 7.0 ± 0.01 | 5.0 ± 0.05 | 1.4 ± 0.72 | 0.95 ± 0.02 | 15.0 ± 0.44 | 2.7 ± 0.15 | |
336 | 55.7 ± 0.31 | 0.085 ± 0.004 | 0.96 ± 0.02 | 6.8 ± 0.05 | 5.3 ± 0.41 | 1.0 ± 0.35 | 0.97 ± 0.01 | 17.7 ± 0.52 | 2.6 ± 0.11 |
Electrodes | Time/h | PE/% |
---|---|---|
Ti alloy/CSNPs/PVP/CoONPs | 0.00 | 78.95 |
24.0 | 87.69 | |
168 | 88.82 | |
336 | 90.87 |
Electrodes | Ecorr/mV | icorr/nA·cm−2 | PE/% |
---|---|---|---|
Ti alloy | −1004 ± 35 | 239 ± 11 | - |
Ti alloy/CSNPs/PVP/CoONPs | −383 ± 17 | 12.6 ± 0.9 | 94.48 |
Types | Hardness (HV0.05) |
---|---|
Ti alloy | 321 ± 9.0 |
Ti alloy/CsNPs/PVP/CoONPs | 387 ± 5.2 |
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Medany, S.S.; Elkamel, R.S.; Abdel-Gawad, S.A.; Fekry, A.M. A Novel Nano-Composite CSNPs/PVP/CoONPs Coating for Improving Corrosion Resistance of Ti-6Al-4V Alloy as a Dental Implant. Metals 2022, 12, 1784. https://doi.org/10.3390/met12111784
Medany SS, Elkamel RS, Abdel-Gawad SA, Fekry AM. A Novel Nano-Composite CSNPs/PVP/CoONPs Coating for Improving Corrosion Resistance of Ti-6Al-4V Alloy as a Dental Implant. Metals. 2022; 12(11):1784. https://doi.org/10.3390/met12111784
Chicago/Turabian StyleMedany, Shymaa S., Renad S. Elkamel, Soha A. Abdel-Gawad, and Amany M. Fekry. 2022. "A Novel Nano-Composite CSNPs/PVP/CoONPs Coating for Improving Corrosion Resistance of Ti-6Al-4V Alloy as a Dental Implant" Metals 12, no. 11: 1784. https://doi.org/10.3390/met12111784