Corrosion resistance improvement of titanium base alloys

• Main Authors: Mihai V. Popa, Ecaterina Vasilescu, Paula Drob, Cora Vasilescu, Silviu I. Drob, Daniel Mareci, Julia C. Mirza Rosca
• Format: Article
• Language: English
• Published: Sociedade Brasileira de Química 2010-01-01
• Series: Química Nova
• Subjects: corrosion rates; EIS; Ti6Al4V1Zr alloy
• Online Access: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422010000900014&lng=en&tlng=en

The corrosion resistance of the new Ti-6Al-4V-1Zr alloy in comparison with ternary Ti-6Al-4V alloy in Ringer-Brown solution and artificial Carter-Brugirard saliva of different pH values was studied. In Ringer-Brown solution, the new alloy presented an improvement of all electrochemical parameters due to the alloying with Zr; also, impedance spectra revealed better protective properties of its passive layer. In Carter-Brugirard artificial saliva, an increase of the passive film thickness was proved. Fluoride ions had a slight negative influence on the corrosion and ion release rates, without to affect the very good stability of the new Ti-6Al-4V-1Zr alloy.