Inhibitive, adsorption and synergistic studies on ethanol extract ofGnetum Africanaas green corrosion inhibitor for mild steel in H₂SO₄

Ethanol extract ofTerminalia catappaas a green inhibitor for the corrosion of mild steel in H2SO4

“…In recent times, there is increasing concern about the toxicity of most corrosion inhibitors because the toxic effects do not only affect living organisms, but also poison the environment (18Á23). According to Eddy and Ebenso (18), green corrosion inhibitors are biodegradable and do not contain heavy metals or other toxic compounds. The successful use of naturally occurring substances for the inhibition of the corrosion of metals in acidic and alkaline media has been reported by some research groups (24Á41).…”

Adsorption and Thermodynamics Study of the Inhibition of Corrosion of Mild Steel In H<sub>2</sub>SO<sub>4</sub> Medium Using <i>Vernonia Amygdalina</i>

“…The values for Frumkin adsorption parameters were recorded in Table 4. This shows that values of the adsorption parameter α are positive suggesting the attractive behavior of the inhibitor on the surface of mild steel [11,34]. …”

“…Such compounds usually contain nitrogen, oxygen or sulphur in a conjugated system and function via adsorption of the molecules on the metal surface, creating a barrier to the corrodant attack [3,5,8,9]. However, because of the Sequel to toxic nature, high cost and increasing awareness and strict environmental regulations of some of these compounds, the use of natural product of plant origin as corrosion inhibitor is receiving attention [10,11]. Corrosion inhibitors derived from plant extract are biodegradable and do not contain heavy metals or other toxic compounds [12].…”

Mild steel corrosion inhibition by acid extract of leaves ofHibiscus sabdariffaas a green corrosion inhibitor and sorption behavior

“…The exposures can be most severe, but in many cases the corrosion may be controlled by means of inhibitors (1,2). Naturally occurring compounds from bio-materials can be interface or interphase inhibitors in acid solution (1).…”