The electrochemical behaviour and the resistance to corrosion and tarnishing of seven commercial low-noble metal alloys were investigated, in artificial saliva at two different pH values (3 and 6.7) and in 2% Na2S solution. The alloys were tested as-received and after a hardening treatment suggested by the manufacturers: ageing 15 min in a temperature range between 360 and 450 °C. Scanning electron microscopy (SEM) examination of the alloys evidenced some slight microstructural modifications. The electrochemical characterization was performed by means of anodic polarization curves. Alloys with noble metal content > 30% show a good electrochemical behaviour and a satisfactory corrosion resistance against tarnishing, and the hardening treatment had no influence on the corrosion resistance. Fulltext Preview

Low-noble metal alloys: in vitro corrosion resistance / Angelini, EMMA PAOLA MARIA VIRGINIA; P., Bianco; M., Mascellani; F., Zucchi. - In: JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE. - ISSN 0957-4530. - STAMPA. - 4:2(1993), pp. 142-149. [10.1007/BF00120383]

Low-noble metal alloys: in vitro corrosion resistance

ANGELINI, EMMA PAOLA MARIA VIRGINIA;
1993

Abstract

The electrochemical behaviour and the resistance to corrosion and tarnishing of seven commercial low-noble metal alloys were investigated, in artificial saliva at two different pH values (3 and 6.7) and in 2% Na2S solution. The alloys were tested as-received and after a hardening treatment suggested by the manufacturers: ageing 15 min in a temperature range between 360 and 450 °C. Scanning electron microscopy (SEM) examination of the alloys evidenced some slight microstructural modifications. The electrochemical characterization was performed by means of anodic polarization curves. Alloys with noble metal content > 30% show a good electrochemical behaviour and a satisfactory corrosion resistance against tarnishing, and the hardening treatment had no influence on the corrosion resistance. Fulltext Preview
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11583/1653876
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