Browsing by Author "Redouane Farid"

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Studies of Corrosion Inhibition Performance of Inorganic Inhibitors for Aluminum Alloy
(Multidisciplinary Digital Publishing Institute (MDPI), 2025) Redouane Farid; Dilip Kumar Sarkar; Santanu Das
In this study, the behavior of sodium silicate (Na2SiO3), manganese sulfate monohydrate (MnSO4·H2O), and ammonium metavanadate (NH4VO3) as corrosion inhibitors for AA6061 aluminum alloy (Al) was investigated. The polarization resistance (Rp) of the Al substrate immersed in 0.1 M NaCl solution was found to be 13 kΩ·cm2. In comparison, the Rp of the Al substrate immersed in 0.1 M NaCl in the presence of Na2SiO3, Na2SiO3/MnSO4·H2O, and Na2SiO3/NH4VO3 inhibitors was found to be 100, 133, and 679 kΩ·cm2, respectively. The best inhibition result was obtained when the mixture of the inhibitors was used with Rp of 722 kΩ·cm2. The maximum percentage of the corroded area calculated from the scanning electron microscopy (SEM) images was found to be 5.7% for Al substrate immersed in 0.1 M NaCl, which decreased to 0.06% when the mixture of the inhibitors was used. The synergetic effects between the three inhibitors were studied, and the results illustrated that the combination of Na2SiO3, MnSO4·H2O, and NH4VO3 provided the best corrosion inhibition properties for Al in aqueous NaCl environments. © 2025 by the authors.