Metal-organic frameworks based on heterocyclic ligands and some transition metals as effective carbon steel corrosion inhibitors in aqueous environment

Eco-Friendly Piper cubeba Official Extract Corrosion Inhibition of C-Steel in 1 M Sulfamic Acid

“…After multiple attempts to adopt a relationship between the greatest concentration of the inhibitor at a given temperature and the degree of surface coverage, the Langmuir adsorption isotherm was shown to be the best curve to characterize the inhibitory performance. The equation , below summarizes the idea that, in the case of the plant extract, the metallic surface contains a specific number of adsorption cores and that each center contains a specific type of adsorbent. C θ = 1 K ads + C The net energy Δ G ° ads was derived using the formula after the adsorption factor K ads ’ quantity had been established. K = 1 55.5 ex normalp − Δ G ads / italicRT The level of concentration of water on the metal surface is 55.5 in mol/L. The distributions of Δ G ads o as a reflection of temperature are shown in Table at an average temperature around 298 and 318 K. As a direct consequence of the findings, we derived an association between Δ G ads o and T , which means that Δ G ads o is strongly influenced by temperature.…”

Experimental and theoretical study of tetraphenylethylene-based dicationic compounds for corrosion inhibition of steel and brass in an acidic medium

“…Whereas the interaction associated with charge sharing or charge transfer between the inhibitor and metal surface can be characterized as chemisorption if the value of Δ G o ads is around −40 kJ mol −1 or more negative. 9,13,29…”

“…Whereas the interaction associated with charge sharing or charge transfer between the inhibitor and metal surface can be characterized as chemisorption if the value of DG o ads is around À40 kJ mol À1 or more negative. 9,13,29 The calculated results of TPE-2NH 3 Á2SCN on 20# steel surface for (3) and ( 4) are c/y = 1.0075 c + 5.1748 Â 10 À6 , K ads = 1.9324 Â 10 5 L mol À1 and DG o ads = À44.84 kJ mol À1 , respectively (Fig. 10(a)).…”

“…11,15–25 Recently, plant extracts, ionic liquids, metal–organic frameworks, and quantum dots have been employed as corrosion inhibitors. 12,26–30 However, most of the corrosion inhibitors are not universally effective for both steel and brass. 31,32…”

“…11,[15][16][17][18][19][20][21][22][23][24][25] Recently, plant extracts, ionic liquids, metal-organic frameworks, and quantum dots have been employed as corrosion inhibitors. 12,[26][27][28][29][30] However, most of the corrosion inhibitors are not universally effective for both steel and brass. 31,32 Tetraphenylethylene (TPE) is a well-known and widely used aggregation-induced emission (AIE) compound.…”