A Combinatorial Approach to Corrosion Inhibition of Alloy
Journal Title: Indian Journal of Dental Advancements - Year 2017, Vol 9, Issue 1
Abstract
Background: To regulate the growth of teeth people are implanted with orthodontic wires made of different materials. They clean their teeth with different types of pastes. During this process the materials may undergo corrosion. The main objective of the present study is to evaluate corrosion resistance of 22ct gold in artificial saliva in the absence and presence of an aqueous solutions of five toothpastes namely Vicco, Dant Kanti, Sparkle Fresh, Emoform and Colgate Visible White Materials and Methods: The corrosion parameters such as corrosion potential (Ecorr), corrosion current (Icorr), linear polarization resistance (LPR), charge transfer resistance (Rct) and double layer capacitance (Cdl) have been measured by electrochemical studies. The surface morphology of the protective film has been analysed with the help of UV-Visible absorption spectra, fluorescence spectra, FTIR, SEM and EDX. Results: Among the toothpastes studied Sparkle Fresh offers better corrosion resistance to 22ct gold. For this system, LPR= 9177478 ohm cm2; Icorr = 2.701x 10-8 A/cm2; Rct =14470 ohm cm2; Cdl= 3.5245 x 10-10 and impedance =4.467 logZ/ohm. The high corrosion resistance offered by the Sparkle Fresh toothpaste is due to formation of a compact, stable, protective film on 22ct gold in presence of Sparkle Fresh toothpaste. The active principles of the ingredients of the toothpaste have co-ordinated with the gold ions on the metal surface through their polar atoms Conclusions: People implanted with orthodontic wires made of 22ct gold need not hesitate to clean their teeth with these toothpastes.
Authors and Affiliations
Renita D'Souza, Amit Chattree, Susai Rajendran
Keywords
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- EP ID EP472674
- DOI 10.5866/2017.9.10015
- Views 75
- Downloads 0
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