Electrochemical studies on the corrosion behavior of orthodontic wire made of thermo active super elastic (TASE) alloy in artificial saliva in the presence of a mouthwash

• T. Umamathi¹, R. Parimalam¹, B. Seethalakshmi¹, K. Hemalatha¹, S. Kasthuri¹ and S. Rajendran^2,3

¹ Department of Chemistry, Sri Meenakshi Government Arts College For Women(A), Madurai 625002, India
² Corrosion Research Centre, Department of Chemistry, St.Antony’s College of Arts and Sciences For Women, Dindigul 624 005, India
³ Adjunct Professor, Centre for Nanoscience and Technology, Pondicherry University, Puducherry, India

Abstract: All metals may have the tendency to undergo tarnish or corrosion. The percentage of corrosion varies from metal to metal. Metal/alloys are used in dentistry in various forms such as metallic curative materials in the mouth, which undergo chemical or electrochemical reaction with the oral environment. The objective of the present investigation is to study the corrosion resistance of thermos active super elastic alloy (TASE) immersed in artificial saliva in the absence and presence of Colgate Max Fresh mouthwash. This has been investigated by polarization study and AC impedance spectra. The corrosion parameters such as corrosion potential (Ecorr), linear polarization resistance (LPR) and corrosion current density (i_corr) values have been derived from polarization study. The corrosion parameters such as charge transfer resistance (R_t) impedance and double layer capacitance (C_dl) have been derived from AC impedance spectra. The influence of Colgate Max Fresh mouthwash on the corrosion resistance of TASE in artificial saliva has been investigated and the corrosion parameter values have been compared. SEM and AFM have been used to analyze the surface morphology.

Keywords: corrosion resistance, TASE alloy, artificial saliva, Colgate Max Fresh mouthwash, polarization study, AC impedance spectroscopy, SEM, AFM

Int. J. Corros. Scale Inhib., 2024, 13, no. 2, 1304-1321
doi: 10.17675/2305-6894-2024-13-2-35

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