Natural products for material protection: corrosion inhibition of stainless steel (aisi 316l) in hydrochloric acid solution by argemone mexicana

Computational Stimulation and Experimental Study on Corrosion Inhibition Qualities of <i>Emilia sonchifolia</i> Leaf Extract for Copper (CU131729) in Hydrochloric Acid

“…The energy dispersive X-ray emission spectroscopy (EDS) was recorded in a VG TC INCA PentaFET x3 spectrometer with Mg K_X-ray source operated at accelerating voltage of 12.5 kV. A detailed procedure for the surface examination is reported in [25].…”

“…A clear close contact pattern between the inhibitor and the metal is observed in that the molecular backbone of the inhibitor aligns itself systematically along electron deficient areas atop the copper crystal [20]. Moreover, the hetero atoms had very close interaction with the crystal surface after stimulation indicating that they are the chief adsorption centers that form thin compact films on the metal surface at the metal/electrolyte interface while blocking intrusion of corrosive species and/or enhancing the metals' passivation potentials [25]. This is an indication that the ES leaf extract constituents could effectively inhibit corrosion of copper in acid chloride media.…”

“…Among several developed strategies to contain copper corrosion, inhibitors of many-sided benefits that involve both environmental and economic friendliness boil down to the use of organic compounds. Organic compounds containing electronegative functional groups and conjugated ρ-electron within multiple bonds have been studied and proven to form compact thin films on metal surfaces which enhance the passivation potentials of metals during corrosion processes [6] [15] [16] [17]. Scientists have ruled out conventional and synthetic organic corrosion inhibitors with regard to their adverse effects on human health and the environment [18].…”

Inhibitory action of Spondias mombin leaves extracts on corrosion of mild steel in 1M HCl

“…Also known as yellow mombin or hug plum; a specie of tree and flowering plant in the family Anacardiaceae. Previously, Spondias mombin extracts have been reported for corrosion inhibition of aluminium (Al) in 0.5 M H2SO4 (Obi-Egbedi et al, 2012), stainless steel in 3.5 % NaCl (Oguike and Oni, 2019), mild steel in H2SO4 (Sidikat et al, 2018) and HCl (Magu et al, 2017). However, these works only focused on extracts of single solvents.…”