CORROSION PERFORMANCE OF ORTHODONTIC BRACKET MADE OF SS18/8 ALLOY INCIDENCE OF SOME TABLETS WITH ARTIFICIAL SALIVA
A. Anandan, Susai Rajendran*, J.Sathiyabama, D. Sathiyaraj and Abdulhameed Al-Hashem
ABSTRACT
The goal of this research was to investigate the corrosion performance of Orthodontic Bracket based on SS18/8
alloy with artificial saliva (AS test solution) in three different tablets (Shelcal, Cefixime, Biogenetics) using
Polarisation, AC impedance techniques. The incidence of Shelcal and Biogenetics tablets, Corrosion
measurements such as Rpol, Rct value increases and Icorr, Cdl value decreases. These data indicate high corrosion
resistance of SS18/8 alloy incidence of Shelcal and Biogenetic tablets with AS test solution. But incidence of
Cefixime tablet Rpol, Rct value decreases and Icorr, Cdl value increases. Polarisation curve (Ecorr) showed that
the Shelcal, Biogenetic tablets cathodic reaction controlled and the stable defending film formed on the SS18/8
alloy surface. Subsequently it is suggested to those implanted with orthodontic bracket made of SS18/8 alloy
should not hesitation to take Shelcal, Biogenetic tablets but Cefixime tablet should avoid. The increase in
corrosion rate or decrease in corrosion rate is due to incidence of active component of tablets.
Keywords: SS18/8 alloy, Corrosion resistance, Tablets, AC Impedance and polarisation method.
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