فهرست نشریات علمی دسترسی آزاد ایران

This study investigated how well a natural dye extract and silver nanoparticles made from Tectona grandis can prevent mild steel from corroding in acidic environments. These nanoparticles appeared dark brown and absorbed light most strongly at a wavelength of 420 nanometers. Analysis confirmed the presence of functional groups: O-H, C=O, C=C, and N-Hb within the nanoparticles. Examination with a scan electron microscope revealed the nanoparticles were mostly spherical or oval. The presence of silver was confirmed, and its crystalline structure was analyzed using XRD analysis. Further tests using nitrogen adsorption technique indicates nanoparticles were mesoporous. Both the dye and the nanoparticles inhibited corrosion of mild steel in acidic solution. Higher concentrations of the inhibitors resulted in greater protection against corrosion. However, this protection weakened at higher temperatures. The inhibitors' presence raised the activation energy needed for corrosion. The corrosion process is an endothermic process. In addition, the entropy change suggests a more ordered arrangement at the metal surface during inhibition. The study suggests that the nanoparticles formed from the extract. Nanoparticle outperformed the die extract alone in inhibiting corrosion The SEM/EDX study of the steel surface following its exposure to the inhibitors revealed very little damage.