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Influence of noble metals alloying additions on the corrosion behaviour of titanium in a fluoride-containing environment.
J Mater Sci Mater Med. 2012 May; 23(5):1129-37.JM

Abstract

Titanium alloys exhibit excellent corrosion resistance in most aqueous media due to the formation of a stable oxide film, and some of these alloys (particularly Ti-6Al-7Nb) have been chosen for surgical and odontological implants for their resistance and biocompatibility. Treatment with fluorides (F(-)) is known to be the main method for preventing plaque formation and dental caries. Toothpastes, mouthwashes, and prophylactic gels can contain from 200 to 20,000 ppm F(-) and can affect the corrosion behaviour of titanium alloy devices present in the oral cavity. In this work, the electrochemical corrosion behaviour of Ti-1M alloys (M = Ag, Au, Pd, Pt) was assessed in artificial saliva of pH = 3.0 containing 910 ppm F(-) (0.05 M NaF) through open circuit potential, E(OC), and electrochemical impedance spectroscopy (EIS) measurements. The corrosion behaviour of the Ti-6Al-7Nb commercial alloy was also evaluated for comparison. E (OC) measurements show an active behaviour for all the titanium alloys in fluoridated acidified saliva due to the presence of significant concentrations of HF and HF(2) (-) species that dissolve the spontaneous air-formed oxide film giving rise to surface activation. However, an increase in stability of the passive oxide layer and consequently a decrease in surface activation is observed for the Ti-1M alloys. This behaviour is confirmed by EIS measurements. In fact, the Ti-6Al-7Nb alloy exhibits lower impedance values as compared with Ti-1M alloys, the highest values being measured for the Ti-1Au alloy. The experimental results show that the corrosion resistance of the studied Ti-1M alloys is similar to or better than that of Ti-6Al-7Nb alloy currently used as biomaterial, suggesting their potential for dental applications.

Authors+Show Affiliations

Dipartimento di Scienza dei Materiali e Ingegneria Chimica (DICHI), Politecnico di Torino, Corso Duca degli Abruzzi 24, 10129 Turin, Italy. francesco.rosalbino@polito.itNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Evaluation Study
Journal Article

Language

eng

PubMed ID

22382735

Citation

Rosalbino, F, et al. "Influence of Noble Metals Alloying Additions On the Corrosion Behaviour of Titanium in a Fluoride-containing Environment." Journal of Materials Science. Materials in Medicine, vol. 23, no. 5, 2012, pp. 1129-37.
Rosalbino F, Delsante S, Borzone G, et al. Influence of noble metals alloying additions on the corrosion behaviour of titanium in a fluoride-containing environment. J Mater Sci Mater Med. 2012;23(5):1129-37.
Rosalbino, F., Delsante, S., Borzone, G., & Scavino, G. (2012). Influence of noble metals alloying additions on the corrosion behaviour of titanium in a fluoride-containing environment. Journal of Materials Science. Materials in Medicine, 23(5), 1129-37. https://doi.org/10.1007/s10856-012-4591-9
Rosalbino F, et al. Influence of Noble Metals Alloying Additions On the Corrosion Behaviour of Titanium in a Fluoride-containing Environment. J Mater Sci Mater Med. 2012;23(5):1129-37. PubMed PMID: 22382735.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Influence of noble metals alloying additions on the corrosion behaviour of titanium in a fluoride-containing environment. AU - Rosalbino,F, AU - Delsante,S, AU - Borzone,G, AU - Scavino,G, Y1 - 2012/03/02/ PY - 2011/05/09/received PY - 2012/02/13/accepted PY - 2012/3/3/entrez PY - 2012/3/3/pubmed PY - 2012/9/6/medline SP - 1129 EP - 37 JF - Journal of materials science. Materials in medicine JO - J Mater Sci Mater Med VL - 23 IS - 5 N2 - Titanium alloys exhibit excellent corrosion resistance in most aqueous media due to the formation of a stable oxide film, and some of these alloys (particularly Ti-6Al-7Nb) have been chosen for surgical and odontological implants for their resistance and biocompatibility. Treatment with fluorides (F(-)) is known to be the main method for preventing plaque formation and dental caries. Toothpastes, mouthwashes, and prophylactic gels can contain from 200 to 20,000 ppm F(-) and can affect the corrosion behaviour of titanium alloy devices present in the oral cavity. In this work, the electrochemical corrosion behaviour of Ti-1M alloys (M = Ag, Au, Pd, Pt) was assessed in artificial saliva of pH = 3.0 containing 910 ppm F(-) (0.05 M NaF) through open circuit potential, E(OC), and electrochemical impedance spectroscopy (EIS) measurements. The corrosion behaviour of the Ti-6Al-7Nb commercial alloy was also evaluated for comparison. E (OC) measurements show an active behaviour for all the titanium alloys in fluoridated acidified saliva due to the presence of significant concentrations of HF and HF(2) (-) species that dissolve the spontaneous air-formed oxide film giving rise to surface activation. However, an increase in stability of the passive oxide layer and consequently a decrease in surface activation is observed for the Ti-1M alloys. This behaviour is confirmed by EIS measurements. In fact, the Ti-6Al-7Nb alloy exhibits lower impedance values as compared with Ti-1M alloys, the highest values being measured for the Ti-1Au alloy. The experimental results show that the corrosion resistance of the studied Ti-1M alloys is similar to or better than that of Ti-6Al-7Nb alloy currently used as biomaterial, suggesting their potential for dental applications. SN - 1573-4838 UR - https://www.unboundmedicine.com/medline/citation/22382735/Influence_of_noble_metals_alloying_additions_on_the_corrosion_behaviour_of_titanium_in_a_fluoride_containing_environment_ L2 - https://doi.org/10.1007/s10856-012-4591-9 DB - PRIME DP - Unbound Medicine ER -