Xingwen Zheng1,2, Min Gong3, Qiang Li4, Lei Guo5. 1. School of Chemical and Environmental Engineering, Sichuan University of Science & Engineering, Zigong, 643000, China. zxwasd@126.com. 2. Key Laboratory of Material Corrosion and Protection of Sichuan Province, Zigong, 643000, China. zxwasd@126.com. 3. Key Laboratory of Material Corrosion and Protection of Sichuan Province, Zigong, 643000, China. 4. School of Chemical and Environmental Engineering, Sichuan University of Science & Engineering, Zigong, 643000, China. 5. School of Materials and Chemical Engineering, Tongren University, Tongren, 554300, China.
Abstract
The inhibition performance and mechanism of loquat leaves extract (LLE) for the corrosion of mild steel in 0.5 M H2SO4 were investigated using weight loss method, electrochemical measurements and scanning electron microscope (SEM). The results revealed that LLE acted as a modest cathodic inhibitor, its inhibition efficiency increased with the concentration of LLE and reached a maximum value of 96% at the 100% V/V concentration, but decreased with incremental temperature. Besides, it was found that the adsorption of LLE on steel surface obeyed Langmuir adsorption isotherm, and then the thermodynamic and kinetic parameters were further determined accordingly. Furthermore, LLE was preliminarily separated by pH-gradient sedimentation and the synergistic inhibition between the isolates was investigated.
The inhibition performance and mechanism of loquat lpan class="Chemical">eaves extract (LLE) for the corrosion of mild steel in 0.5 M H2SO4 were investigated using weight loss method, electrochemical measurements and scanning electron microscope (SEM). The results revealed that LLE acted as a modest cathodic inhibitor, its inhibition efficiency increased with the concentration of LLE and reached a maximum value of 96% at the 100% V/V concentration, but decreased with incremental temperature. Besides, it was found that the adsorption of LLE on steel surface obeyed Langmuir adsorption isotherm, and then the thermodynamic and kinetic parameters were further determined accordingly. Furthermore, LLE was preliminarily separated by pH-gradient sedimentation and the synergistic inhibition between the isolates was investigated.
Authors: Rokaia Safwat Abdullah; Nehal A Barghout; Sahar S A El-Sakka; Mohamed H Soliman; Maher A El-Hashash; Safaa Ragab; Ahmed El Nemr Journal: Sci Rep Date: 2022-09-15 Impact factor: 4.996