2002-14-3-118-125 - Saudi Dental Journal

ISSN (Print) 1013-9052
EISSN 1658-3558

The Saudi Dental Journal,
P.O. Box 52500,
Riyadh 11563,
Kingdom of Saudi Arabia

Tel.	966-1-467-7328
Fax.	933-1-467-7308 / 966-1-467-7534
Email	saudidj@ksu.edu.sa

Corrosion behavior of new titanium alloy for dental implant applications

Abdullah M. Al-Mayouf*, PhD, Amal A. Al-SwayihF*, MSc
Norah A Al-MobarakF **, PhD, Abed S. Al-JababG ***, PhD
* Department of Chemistry, College of Science, King Saud University, P.O. Box 2455, Riyadh,11451, Saudi Arabia
** Scientific Departments, Girls' College of Education at Riyadh, P.O. Box 27104, Riyadh,11417, Saudi Arabia
*** Department of Restorative Dental Science, College of Dentistry, King Saud University, P.O. Box 90573, Riyadh,11632, Saudi Arabia

This study presents the corrosion behavior of a low melting point titanium alloy, which contains 30% weight copper and 10% weight silver (TCA). The study was carried out in naturally aerated artificial saliva using different methods: open-circuit potential, linear polarization, potentiodynamic scan and electrochemical impedance spectroscopy. In addition, the behavior of pure titanium (Ti) and Ti6Al4V (TVA) were also studied for comparison. Titanium and its alloys exhibited spontaneous and immediate passivity as a result of oxide film formation. The interpretation of electrochemical impedance spectroscopy (EIS) results was based upon a two-layer model of the oxide film, which consisted of a thin barrier-type inner layer and a porous outer layer. The potentiodynamic curves had an extremely low passivation current density and an excellent corrosion resistance. The long-term results indicated that the film oxide was very stable up to 15 days. It was concluded from this study that TCA alloy has a good corrosion resistance comparable to that of TAV alloy, but less than that of Ti corrosion resistance

Saudi Dental Journal 2002;14(3):118-125.