Corrosion Inhibition and Adsorption Behavior of Punica granatum Extract on Mild Steel in Acidic Environments: Experimental and Theoretical Studies

Abstract

The adsorption and corrosion inhibiting effect of aqueous extracts of Punica granatum (PNG) on mild steel in 1 M HCl and 0.5 M H 2 SO 4 at 30 ( 1 °C was investigated using gravimetric, electrochemical impedance spectroscopy (EIS), and potentiodynamic polarization techniques. The experimental findings revealed that PNG inhibited the corrosion reaction in both acid environments. Impedance results indicate that the extract organic matter was adsorbed on the metal/solution interface, while polarization data show that the extract behaved mostly as a mixed-type inhibitor. A theoretical study of the adsorption behavior of some of the components of the crude extracts was carried out in the framework of the density functional theory (DFT).

Exploiting the Anticorrosion Effects of Vernonia Amygdalina Extract for Protection of Mild Steel in Acidic Environments

“…VA thus functioned as a mixedtype corrosion inhibitor in both 1 M HCl and 0.5 M H 2 SO 4 [36][37]. The inhibition efficiency (IE) from the potentiodynamic polarization experiments was quantified as: (2) Where i corr(bl) and i corr(inh) represent the corrosion current density in the absence and presence of the inhibitor, respectively.…”

Tropane and Granatane Alkaloid Biosynthesis: A Systematic Analysis

“…Molluscidal activity in pomegranate bark extracts was effective in killing of Lymnaea acuminata, the vector for F. hepatica [28,29]. Beyond their medicinal properties, GAs also differ from TAs in that GAs have been found to be useful in the prevention of corrosion in the oil, gas and metal industries [30].…”

“…Therefore, according to this hypothesis, lysine (25) is catalyzed in one enzyme or enzyme complex to produce 5-aminopentanal (30). The 5-aminopentanal intermediate (30) would cyclize to form a ∆ 1 -piperidinium cation (31), which can then be methylated at the nitrogen atom to form the N-methyl-∆ 1 -piperidinium cation (29) or remain unmethylated and ultimately go on to form pelletierine (5). converted to the corresponding oxobutanoate by the decarboxylative condensation of two malonyl-CoA which would then cyclize to form pseudopelletierine (6).…”

Protecting Mild Steel from Acid Corrosion Using Extract from <i>Ocimum gratissimum</i> Leaves

“…The best method to protect materials from corrosion attack is to isolate the material from the environment where the corrosion effect takes place. Most effective corrosion inhibitors that are available today are costly, poisonous, and constitute environmental hazards, hence the need for testing materials of plant origin for their anti-corrosion properties [1][2][3][4][5][6][7][8][9][10]. These materials are preferred considering the fact that they are save for human consumption, cheap, and are less hazardous to the environment [11][12][13][14][15][16][17][18][19][20].…”