Electropolymerization of mefenamic acid on stainless steel 304L orthodontic alloy in artificial saliva solution and study of the effect of BSA, citric acid, and sucrose on its corrosion behavior

• I.M. Tawfeeq^1,2 and K.A. Saleh¹

¹ Department of Chemistry, College of Science, Baghdad University, Jaderyah-10071, Baghdad, Iraq
² Department of Basic Science, College of Dentistry-10071, Baghdad University, Baghdad, Iraq

Abstract: The corrosion resistance of stainless steel SS.304L, which is used in many applications such as orthodontic appliances, has been studied in artificial saliva after coating with poly-mefenamic acid (P-MA) obtained by the electropolymerization method. Orthodontic appliances become subjected to adverse conditions of the oral cavity, including saliva flow, temperature fluctuations, food, and mechanical pressures exerted by the appliances themselves. Multiple approaches exist for examining the mechanical properties, antibacterial efficacy, surface roughness, and anti-adhesive features of poly-mefenamic acid. Fourier transform infrared spectroscopy (FT-IR) has been used to analyze the protective film on the stainless steel surface. The polarization technique shows that the corrosion potential of SS.304L orthodontic alloy shifts in anodic direction when coated with P-MA, while the corrosion current density decreases. The findings showed that the optimal corrosion protection efficiency was 94% after coating by P-MA at 293 K, which subsequently diminished upon the addition of bovine albumin serum, citric acid, and sucrose to the corrosive solution (artificial saliva) to values of 81%, 70%, and 75%. According to the study findings, patients who have orthodontic treatment using SS.304L alloy can confidently and fearlessly chew and insert poly-mefenamic acid into their tooth cavities.

Keywords: electropolymerization, artificial saliva, poly-mefenamic acid, orthodontic appliances, SS.304L, natural products, corrosion resistance

Int. J. Corros. Scale Inhib., 2025, 14, no. 3, 1649-1664
doi: 10.17675/2305-6894-2025-14-3-31

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