Corrosion Inhibition of Steel by Various Parts of Rotula Aquatica Plant Extracts in H2SO4 Solutions

Abstract

The corrosion inhibition and adsorption of ethanol extracts of leaves (LV), stems (ST) and roots (RT) of Rotula aquatica plant for mild steel in H 2 SO 4 solutions were investigated using conventional weight loss, gasometric techniques, electrochemical polarizations and electrochemical impedance spectroscopy. The results showed that all the three extracts of Rotula aquatica plant performed well as inhibitor for the corrosion of steel in sulphuric acid media and the inhibition efficiencies of the extract follow the trend RT > LV > ST. Inhibition efficiencies increased with increasing concentration of the plant extracts but decreased with the temperature rise for all cases. Both the cathodic hydrogen evolution and the anodic dissolution of mild steel were inhibited, hence the active molecules of all the extracts studied acted as mixed type corrosion inhibitors.

Optimization of the inhibition corrosion of carbon steel in an acidic medium by a novel eco-friendly inhibitor Asphodelus ramosus using response surface methodology

“…Numerous studies have looked into the efficacy of green plant-derived corrosion inhibitors in attempting to prevent metal corrosion in acidic environments. Among them is Ficus tikoua leaf extract, which has a 95.8 % effectiveness for carbon steel [12], Azadirachta indica leaf extract, with an efficiency of 86.4 % [13], kiwi juice, with an efficiency of 96.1 % [14], Phyllanthus amarus leaf extract with an efficiency of 95 % at 303 K [15], peach juice with an efficiency of 91 % [16], Laurus nobilis leaf extract with an efficiency of 92 % [17], Juniperus plants [18], Origanum majorana extracts [19], and Phyllanthus fraternus extracts [20]. In addition, Xanthium strumarium extract showed an efficiency of 94.8 % for carbon steel in 1 M HCl at 10 g/L [21], while Glycyrrhiza glabra leaves extract showed an efficiency of 88 % for mild steel in 1 M HCl at 800 ppm [22].…”

Electrochemical, Adsorption and Anticorrosion Study on Fluvoxamine and its Blends for X80 Steel Protection in Well Acidizing Fluids

“…The negative sign of reflects the exothermic nature of X80 steel corrosion in HCl. Thermodynamically, it is consistent for an exothermic process with decreasing entropy to be spontaneous at temperatures that are not too high [27]. The difference in diameter size from that of the HCl solution is due to the influence of FLU on the corrosion rate of X80 steel through the inhibition process.…”

Effect of Acid Extract of Leaves of Juniperus procera on Corrosion Inhibition of Carbon Steel in HCl Solutions

“…For this reason, there is an increase demand for new techniques to control and suppress corrosion which may be induced by using of these acids. Among these techniques, natural inhibitors have drawn attention as a cost-effective way for inhibiting acid corrosion [4][5][6][7]. Various organic compounds, such as acetylenic alcohol, quaternary ammonium salts and many other compounds that containing hetero atoms are extensively used as corrosion inhibitors in several industries.…”