| RESEARCH |
ALLOY TYPES |
FLUORIDE ORBLEACHING AGENT CONTENT (pH) |
EFFECTS |
| Souza et al. [4,23] |
CP titanium grade II, Ti6Al4V |
20ppm F (5,5) |
OCP and EIS results on 0upto227ppm indicateda passive film formation |
| 30ppm F (5,5) |
EIS and OCP results at 12300ppm indicated an increase of the chemical reactivity |
227ppm F (5,5)
12300ppm F (6,5) |
Significant increase of the weight loss up to 227 and 12300ppmand consequently a localized corrosion of titanium |
| Mabilleau et al. [14] |
CP titanium grade II |
5000ppm F |
Corrosionof the surface was observed by SEM and AFM |
25000ppm F
0,1% H2O2
10% H2O2 |
Significant increase of Raroughness occurred after immersion in the media |
| Mayouf et al. [21] |
Ti–30Cu–10Ag
CP titanium grade II
Ti–6Al–4V |
0,01M NaF (7,2) |
The presence of 0.01 and 0.05M NaF at pH 7.2 affectedthe corrosion resistance of TiCuAg less than Ti and TiAlV |
| 0,05M NaF (7,2) |
TiAlV has a lower corrosion rate at 0,5M NaF in comparison with Ti and TiCuAg |
| 0,5M NaF (7,2) |
The high concentration of NaFhadasignificant effect on TiCuAg |
| 0,01M NaF(3,0) |
At pH 3,TiCuAa showed a lower corrosion rate than that of Ti and TiAlV |
| Nakagawa et al. [22] |
CP titanium grade II |
90.5 to 9048ppm F (3-7) |
Corrosion resistance of titanium was maintained in the 2% NaF at pH higher than 6,2
The titanium corroded in a solution at pH below 6,2 |
| Nakagawa et al. [24] |
CP titanium grade II
Ti–6Al–4V
Ti-6Al-7Nb
Ti-0.2Pd |
226 to 9048ppm F (3-7) |
CPTi, Ti-6Al-4V and Ti-6Al-7Nb alloys were easily corroded even at low fluoride concentration in acidic environment
The corrosion resistance of Ti-0.2Pd alloy was higher |
| Nakagawa et al. [25] |
CP titanium grade II
Ti–6Al–4V
Ti-6Al-7Nb
Ti-0.2Pd
Ti-0.5Pt |
226 to 2262ppm NaF (5-6,5) |
CP Ti, Ti-6Al-4V and Ti-6Al-7Nb alloys corroded in fluoride solutions containing453 ppm F
Ti-0.2Pd and Ti-0.5Pt revealed higher corrosion resistance than that recorded on the other alloys |
| Faverani et al. [30] |
CP titanium grade II
Ti–6Al–4V |
16% carbamide peroxide
35% carbamide peroxide
35% hydrogen peroxide |
Bleaching agents caused significant changes on the surfaces of both materials tested |
