The corrosion inhibition characteristics of the quadridentate macrocycle 1, 4, 8, 11 tetra‐azacyclotetradecane (cyclam) on steel in sulfuric acid media are investigated at 25, 35, 45, and 55°C, thermodynamic energy parameters calculated. In addition open‐chain polydentate amines, ethylenediamine (en), diethylenetriamine (dien), triethylenetetraamine (trien), tetraethylenepentamine (tetren) were 25°C. Activation‐free energies, enthalpies, entropies for process both cyclam tetren determined...

In response to the industry's difficulty in properly separating oily wastewater discharge, researchers are investigating enhanced oil/water separation materials. this work, a cost-effective and environmentally friendly superhydrophobic textile fabric was fabricated for effective oil-water mixture emulsion separation. A biological metal-organic framework consisting of copper as core metal aspartic acid linker (Cu-Asp MOF) used improve surface roughness pristine fabric, stearic lower its...

The corrosion inhibition process during acid pickling in petroleum industries often employs toxic chemicals, facing stringent environmental regulations. This study explores a sustainable alternative by investigating the inhibitory effects of eco-friendly food waste extracts, namely Prunus domestica seeds (P.S) and Okra stems (O.St), on B7 grade steel 1.0 M HCl aqueous solution, simulating an environment. efficiency was estimated via both electrochemical methods, including impedance...

Carbon and graphene-based quantum dots have recently emerged as highly valuable widely applicable materials based on their low particle sizes (1–10 nm). The incorporated oxygen, nitrogen, carbon functional groups can significantly enhance the binding capabilities of these to various surfaces. In this study, lupine seeds were employed produce a sustainable novel material known (LCQDs), by using straightforward green microwave hydrothermal reaction. assembled LCQD was characterized several...

Abstract Corrosion inhibition characteristics of four selected S-alkylisothioronium halides on steel in sulfuric acid (H2SO4) media were investigated at 30°C, 40°C, 50°C, and 60°C. The number active sites the metal occupied by a molecule inhibitor (1/y) binding constants (K) to calculated different temperatures. Activation free energies, enthalpies, entropies for processes determined from rate-constant data measured 60°C two fixed concentrations. Data compared fitted published...

Abstract The inhibitive effect of damsissa (Ambrosia maritime, L.) plant extracts on the corrosion steel in an aqueous solution 1 M sulfuric acid (H2SO4) was investigated temperature range from 25°C to 40°C using potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) techniques. stability inhibition efficiency with immersion time examined by weight-loss measurements at 30°C 60°C. Potentiodynamic curves indicated that extract behaves as a mixed-type inhibitor. EIS...

Potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) techniques were used to measure the corrosion rate of aluminium in 0.1 M HCl absence presence different concentrations chitosan.Inhibition efficiency up 90% 0.028 g/L chitosan was achieved.Increasing concentration shifted breakdown potential, Eb, more noble values inhbitied pitting aluminium.Measurements break electrical double layer capacity (Qdl) indicated that is adsorbed at aluminium/solution interface.

Abstract Potentiostatic deposition of cobalt film and cobalt-graphene, Co-G, composite, followed by modification with low surface energy stearic acid (SA), was used to fabricate superhydrophobic films on a steel substrate successfully. A scanning electron microscope analyze the morphology prepared modified acid, Co-SA, cobalt-graphene Co-G-SA. The findings show that both fabricated have micro-nanostructures. Co-G-SA shows higher roughness due network structures graphene so exhibits...

The effect of Punica granatum hull and leaf extracts as green inhibitors for the formation calcium carbonate scale have been investigated using conductivity measurements, electrochemical impedance spectroscopy (EIS), chronoamperometry techniques in conjunction with scanning electron microscopy (SEM), energy- dispersive x-ray analysis (EDX) optical microscopic examinations. Mineral scales were deposited from brine solution by cathodic polarization steel surface. results showed that...

The effect of extract cannabis plant on the corrosion copper in aqueous 0.5M sulphuric acid was investigated by electrochemical impedance spectroscopy (EIS), potentiodynamic polarization, weight loss and optical micrograph techniques. EIS polarization measurements showed that dissolution process occurs under diffusion control. Potentiodynamic curves indicated behaves as cathodic-type inhibitor. rates inhibition efficiencies were calculated. results obtained show solution could serve an...

The antiscale properties of palm leaves extract (Phoenix dactylifer L) were studied using electrochemical impedance spectroscopy (EIS) and chronoamperometry techniques, in addition to microscopic examination. Calcium carbonate scales deposited from the brine solution by cathodic polarization steel surface at −0.9 V (vs. SCE). Chronoamperometry curves EIS measurements displayed that increased time CaCO3 nuclei formation consequently, retarded growth step. optical micrographs electrode...

Abstract Mineral scale is a major flow assurance problem in industrial water systems. The antiscale properties of sunflower (Helianthus annuus) seed extract for CaSO4 and BaSO4 scales were investigated using NACE conductivity tests, respectively. Comparative studies between the 1-hydroxyethane-1,1-diphosphonic acid (HEDP), as commercial antiscalants, done. results revealed that inhibition reached 100%, while HEDP achieved maximum 88%. Moreover, presence was 84% compared with 86% HEDP. Also...

The adsorption isotherms of t-butanol on polarized Hg electrodes, studied from 0.1 mol dm–3 Na2SO4 aqueous solutions by means both electrocapillary and capacity measurements, are congruent with respect to neither charge nor potential. Using analysis at constant charge, the maximum indicates that potential zero alcohol in preferentially orientated positive end dipole towards metal surface. Adsorption obeys a Frumkin isotherm interaction parameter decreasing quadratically saturation coverage...

The adsorption of propionitrile on polarized Hg electrodes has been studied from 0.25 mol dm–3 NaF aqueous solutions by means both electrocapillary and capacity curves. results show that the isotherms are apparently congruent with respect to charge potential negative side maximum in adsorption. In this region, a Frumkin isotherm is obeyed saturation coverage Γs= 5.9 × 10–10 cm–2, corresponding projected area A= 28 Å2 per molecule, an interaction parameter intermolecular attraction. On...

The effect of extracts Damsissa, Corchours itorius on the corrosion aluminum in aqueous 0.1M sodium carbonate were investigated by gasometry, potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) techniques. EIS measurements showed that Nyquist plots consist capacitive semicircle followed inductive loop indicating dissolution process occurs under activation control. Potentiodynamic curves indicated plants behave as mixed-type inhibitors. Gasometry results retard...

Abstract In the present work, dopamine is self-polymerized on cotton fabric by a simple deep-coating method and followed modification with an ethanolic solution of palmitic acid: superhydrophobic/oleophilic was obtained. The as-prepared exhibits superhydrophobic character water contact angle 157o. absorption capacity in n-hexane, petroleum ether, silicone oil determined. results show that has highest while n-hexane lowest value. nearly constant even after ten cycles, indicating efficient...