The influence of different electrolytes on the corrosion behaviour of three dental casting alloys for resin bonding with different no- bility was investigated. The alloys were studied in the metallurgical state representing that in the oral cavity. Structural and morpholo- gical characterisation was performed by means of optical and elec- tronic microscopy and EDS microanalysis. The corrosion resistance was evaluated by means of potentiodynamic anodic polarization curves recorded in three different aggressive environments: artifi- cial saliva (pH ˆ 6.7), Ringer's solution and 0.1 N NaCl solution added with lactic acid (pH ˆ 2). The latter solution is recom- mended by UNI EN ISO 8891 for the static immersion corrosion test. For comparison purposes the electrochemical behaviour of the pure alloying metals in this solution was also investigated. Results showed a satisfactory corrosion resistance of the alloys examined. The synthetic saliva was the least aggressive electrolyte for all of them but it did not allow to distinguish the corrosion behaviour of these alloys although their differences in nobility and structure. The chloride-containing solutions showed a better distinction in the corrosion behaviour, as matter of facts, as the chloride content increased, the higher (Cu ‡ Ag) amount was in the alloy, the higher was its current density in the immunity region of the anodic polarisation curves. The environment recommended by the normative UNI EN ISO 8891 resulted the most sensitive and effective for the discrimination of the corrosion resistance of precious metal alloys for resin bonding with different nobility by means of the potentiodynamic test.

Corrosion resistance in different environments and structural features of dental casting alloys for resin bonding / PINASCO M., R; Angelini, EMMA PAOLA MARIA VIRGINIA; Cordano, E; Rosalbino, Francesco. - In: MATERIALS AND CORROSION. - ISSN 0947-5117. - ELETTRONICO. - 52:(2001), pp. 513-523.

Corrosion resistance in different environments and structural features of dental casting alloys for resin bonding

ANGELINI, EMMA PAOLA MARIA VIRGINIA;ROSALBINO, Francesco
2001

Abstract

The influence of different electrolytes on the corrosion behaviour of three dental casting alloys for resin bonding with different no- bility was investigated. The alloys were studied in the metallurgical state representing that in the oral cavity. Structural and morpholo- gical characterisation was performed by means of optical and elec- tronic microscopy and EDS microanalysis. The corrosion resistance was evaluated by means of potentiodynamic anodic polarization curves recorded in three different aggressive environments: artifi- cial saliva (pH ˆ 6.7), Ringer's solution and 0.1 N NaCl solution added with lactic acid (pH ˆ 2). The latter solution is recom- mended by UNI EN ISO 8891 for the static immersion corrosion test. For comparison purposes the electrochemical behaviour of the pure alloying metals in this solution was also investigated. Results showed a satisfactory corrosion resistance of the alloys examined. The synthetic saliva was the least aggressive electrolyte for all of them but it did not allow to distinguish the corrosion behaviour of these alloys although their differences in nobility and structure. The chloride-containing solutions showed a better distinction in the corrosion behaviour, as matter of facts, as the chloride content increased, the higher (Cu ‡ Ag) amount was in the alloy, the higher was its current density in the immunity region of the anodic polarisation curves. The environment recommended by the normative UNI EN ISO 8891 resulted the most sensitive and effective for the discrimination of the corrosion resistance of precious metal alloys for resin bonding with different nobility by means of the potentiodynamic test.
File in questo prodotto:
File Dimensione Formato  
513_ftp.pdf

non disponibili

Tipologia: 1. Preprint / submitted version [pre- review]
Licenza: Non Pubblico - Accesso privato/ristretto
Dimensione 486.77 kB
Formato Adobe PDF
486.77 kB Adobe PDF   Visualizza/Apri   Richiedi una copia
Pubblicazioni consigliate

Caricamento pubblicazioni consigliate

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11583/1896859
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo