Prakashaiah, B.G.Nityananda Shetty, A.N.Amitha Rani, B.E.A.2026-02-052020Surface Engineering and Applied Electrochemistry, 2020, 56, 5, pp. 610-62310683755https://doi.org/10.3103/S1068375520050129https://idr.nitk.ac.in/handle/123456789/23732Abstract: A corrosion inhibitor bis[[3,4-dihydroxyphenylmethylene]carbonothioicdihydrazide] (DCT) was synthesized and used to improve the corrosion resistance of an epoxy based primer coating on AA2024-T3 alloy in NaCl solution. The ability of DCT to inhibit the corrosion was evaluated by electrochemical studies. The compound exhibited an inhibition efficiency of 99%. The surfaces of the corroded specimens were characterized by field emission scanning electron microscopy, energy dispersive X-ray spectroscopy, and X-ray photoelectron spectroscopy. The anticorrosion nature of the substrate coated with a commercial epoxy-based primer doped with DCT was evaluated by electrochemical impedance spectroscopy and a salt spray test. The results established not only the ability of DCT to improve the anticorrosion property of the epoxy based primer coating on AA2024-T3 alloy but also a sustained corrosion protection (1000 h) of the alloy. © 2020, Allerton Press, Inc.Corrosion inhibitorsCorrosion resistanceCorrosion resistant alloysElectrochemical corrosionElectrochemical impedance spectroscopyEnergy dispersive spectroscopyField emission microscopesScanning electron microscopySodium alloysSodium chlorideX ray photoelectron spectroscopyAA2024-T3 alloysAnti-corrosion propertyElectrochemical studiesEnergy dispersive X ray spectroscopyField emission scanning electron microscopyInhibition efficiencyPrimer coatingsSalt Spray testCorrosion resistant coatings