Corrosion Inhibition Of Aluminum Research Articles

DFT Calculations on Corrosion Inhibition of Aluminum by Some Carbohydrates

DFT Calculations on Corrosion Inhibition of Aluminum by Some Carbohydrates

DFT Calculations of Mesembryanthemum nodiflorum Compounds as Corrosion Inhibitors of Aluminum

DFT Calculations of Mesembryanthemum nodiflorum Compounds as Corrosion Inhibitors of Aluminum

Aluminium Corrosion Inhibition by Maesobatrya barteri Root Extract in Hydrochloric Acid Solution

Aluminium Corrosion Inhibition by Maesobatrya barteri Root Extract in Hydrochloric Acid Solution

Thymus algeriensis extract as a new eco-friendly corrosion inhibitor for 2024 aluminium alloy in 1 M HCl medium

The inhibitive behaviour on 2024 aluminium alloy of Thymus algeriensis extract was investigated in an aerated 1M HCl solution via weight loss, gasometric and electrochemical impedance spectroscopy (EIS) techniques. It was found that the addition of the extract reduces the corrosion rate of aluminium alloy. The inhibition efficiency increases with increasing extract concentration and attained 78.7% at 0.75g/L. The inhibitive effect of the tested extract was discussed in view of adsorption of its components on the aluminium surface. The adsorption of the extract components of T. algeriensis on the aluminium alloy surface follows Langmuir adsorption isotherm. The effect of the temperature on the corrosion behaviour with addition of the optimal concentration of T. algeriensis extract was studied in the temperature range of 298 and 338K. The inhibition efficiency is independent of temperature. The presence of extract increases the activation energy of the corrosion process of aluminium alloy. The synergistic action caused by iodide ions on the corrosion inhibition of aluminium in 1M HCl by 0.75g/L was studied using weight methods at 298K. The inhibition efficiency synergistically increased on addition of potassium iodide.

Cefuroxime axetil: A commercially available drug as corrosion inhibitor for aluminum in hydrochloric acid solution

Cefuroxime axetil (CA) a pro-drug was tested as corrosion inhibitor for aluminum in hydrochloric acid solution using thermometric, gasometric weight loss and scanning electron microscope (SEM) techniques. Results obtained showed that this compound has good inhibiting properties for aluminum corrosion in acidic medium, with inhibition efficiencies values reaching 89.87 % at 0.5 g / L. It was also found out that the results from weight loss method are highly consistent with those obtained by hydrogen evolution method and gasometric method; and all indicate that inhibitor efficiency increases with increasing inhibitor concentration. Cefuroxime axetil inhibited the corrosion of aluminum in solutions of HCl through the mechanism of physiosorption as confirmed by values of activation energy and free energy of adsorption. The adsorption of the inhibitor was also found to be spontaneous, exothermic and best fitted the Langmuir adsorption model. SEM analysis confirmed the existence of an absorbed protective film on the aluminum surface.

Organic corrosion inhibitors for aluminium and its alloys in acid solutions: a review

Corrosion inhibition of aluminium in acidic solutions using different organic compounds.

Corrosion Inhibition of Aluminum by Psidium Guajava Seeds in HCl Solution

The corrosion inhibition and adsorption of ethanol extracts of Psidium guajava seeds (EE Pg S), for aluminum in 0.5 N HCl solutions, were inves tigated using conventional weight loss, FTIR spectroscopy and SEM analysis techniques. The results showed that EE Pg S performed well as inhibitor for the corrosion of aluminum in hydrochloric acid media. FTIR results showed that the inhibition mech anism was by adsorption process, through the functional groups present in the extrac t. Inhibition efficiency increased with increasing concentration of the plant extract, but decreased with the temperature rise. The weight loss data were fitted into a number of i sotherms, though Langmuir model was found to be the best fit. The SEM photographs c onfirmed the protection offered by the extract on the surface of the metal.

Corrosion Inhibition of Aluminium in 2 M Phosphoric Acid Using the Essential Oil of Mentha Pulegium Leaves

Corrosion Inhibition of Aluminium in 2 M Phosphoric Acid Using the Essential Oil of Mentha Pulegium Leaves

The Efficiency of Chloroquine as Corrosion Inhibitor for Aluminium in 1M HCl Solution : Experimental and DFT Study

The Efficiency of Chloroquine as Corrosion Inhibitor for Aluminium in 1M HCl Solution : Experimental and DFT Study

Aromatic Carboxylic Acids as Corrosion Inhibitors for Aluminium in Alkaline Solution

Aromatic Carboxylic Acids as Corrosion Inhibitors for Aluminium in Alkaline Solution

Gelatin as corrosion inhibitor for aluminum and aluminum silicon alloys in sodium hydroxide solutions

The corrosion behavior of aluminum and aluminum silicon alloys in 0.1 M NaOH solution in the absence and presence of gelatin was studied using potentiostat polarization, electrochemical impedance spectroscopy (EIS), cyclic voltammetry and potentiodynamic anodic polarization techniques. The percentage inhibition efficiency increases with increasing the concentration of gelatin and with decreasing temperature as well as Si content. This was attributed to a lower affinity of the inhibitor to adsorb on Si than on Al. The inhibitory action of gelatin was explained in terms of adsorption of gelatin on the surface of Al or Al–Si alloys forming a barrier of mass and charge transfer leading to protect the metal surface from the aggressive ones. The adsorption of gelatin on the metal surface follows Freundlich isotherm. Some activated thermodynamic parameters were calculated and discussed.

Corrosion Inhibition Properties of Telfaira Occidentalis Leaf Extract on Aluminium in 1.5M HCl Medium

Corrosion inhibition of aluminium by leaf extract Telfaira occidentalis in 1.5 M HCl was investigated using the gasometric technique at 28oC. Results obtained showed that the extract displayed high inhibition efficiency against corrosion of aluminium in 1.5 M HCl solution. The extract displayed nearly the inhibition efficiencies at concentration range 10 – 50% dilution of the extract. The corrosion inhibition mechanism followed Langmuir adsorption isotherm at the studied temperature. This suggests the extract constituent chemisorbed on the aluminium surface forming a protective film minimising direct contact with the corrodent.

Cefuroxime Axetil: A Commercially Available Pro-Drug as Corrosion Inhibitor for Aluminum in Hydrochloric Acid Solution

Cefuroxime axetil (CA) a pro-drug was tested as corrosion inhibitor for aluminum in hydrochloric acid solution using thermometric, gasometric weight loss and scanning electron microscope (SEM) techniques. Results obtained showed that this compound has good inhibiting properties for aluminum corrosion in acidic medium, with inhibition efficiencies values reaching 89.87 % at 0.5 g / L. It was also found out that the results from weight loss method are highly consistent with those obtained by hydrogen evolution method and gasometric method; and all indicate that inhibitor efficiency increases with increasing inhibitor concentration. Cefuroxime axetil inhibited the corrosion of aluminum in solutions of HCl through the mechanism of physiosorption as confirmed by values of activation energy and free energy of adsorption. The adsorption of the inhibitor was also found to be spontaneous, exothermic and best fitted the Langmuir adsorption model. SEM analysis confirmed the existence of an absorbed protective film on the aluminum surface.

Electrochemical and gravimetric measurements of inhibition of aluminum corrosion by poly (methacrylic acid) in H2SO4 solution and synergistic effect of iodide ions

The corrosion inhibition of Al in 0.5M H2SO4 solution by poly (methacrylic acid) (PMAA) alone and in combination with iodide ions was studied at 303–333K using gravimetric, electrochemical impedance spectroscopy, potentiodynamic polarization, scanning electron microscopy and water contact angle measurements techniques. Results obtained show that PMAA moderately inhibited the dissolution of Al in the corrosive medium. Addition of Iodide ions synergistically upgrades the inhibition efficiency of PMAA to a maximum value of 82.6%. From polarization results, PMAA and PMAA+KI can be classified as mixed-type corrosion inhibitor. Thermodynamic parameters namely Gibbs free energy of adsorption, activation energy and enthalpy of activation revealed that the adsorption processes of PMAA and PMAA+KI are endothermic reactions mainly by a physisorption mechanism and followed El-Awady et al. thermodynamic–kinetic adsorption isotherm.

Some Phthalocyanine and Naphthalocyanine Derivatives as Corrosion Inhibitors for Aluminium in Acidic Medium: Experimental, Quantum Chemical Calculations, QSAR Studies and Synergistic Effect of Iodide Ions.

The effects of seven macrocyclic compounds comprising four phthalocyanines (Pcs) namely 1,4,8,11,15,18,22,25-octabutoxy-29H,31H-phthalocyanine (Pc1), 2,3,9,10,16,17,23,24-octakis(octyloxy)-29H,31H-phthalocyanine (Pc2), 2,9,16,23-tetra-tert-butyl-29H,31H-phthalocyanine (Pc3) and 29H,31H-phthalocyanine (Pc4), and three naphthalocyanines namely 5,9,14,18,23,27,32,36-octabutoxy-2,3-naphthalocyanine (nPc1), 2,11,20,29-tetra-tert-butyl-2,3-naphthalocyanine (nPc2) and 2,3-naphthalocyanine (nP3) were investigated on the corrosion of aluminium (Al) in 1 M HCl using a gravimetric method, potentiodynamic polarization technique, quantum chemical calculations and quantitative structure activity relationship (QSAR). Synergistic effects of KI on the corrosion inhibition properties of the compounds were also investigated. All the studied compounds showed appreciable inhibition efficiencies, which decrease with increasing temperature from 30 °C to 70 °C. At each concentration of the inhibitor, addition of 0.1% KI increased the inhibition efficiency compared to the absence of KI indicating the occurrence of synergistic interactions between the studied molecules and I− ions. From the potentiodynamic polarization studies, the studied Pcs and nPcs are mixed type corrosion inhibitors both without and with addition of KI. The adsorption of the studied molecules on Al surface obeys the Langmuir adsorption isotherm, while the thermodynamic and kinetic parameters revealed that the adsorption of the studied compounds on Al surface is spontaneous and involves competitive physisorption and chemisorption mechanisms. The experimental results revealed the aggregated interactions between the inhibitor molecules and the results further indicated that the peripheral groups on the compounds affect these interactions. The calculated quantum chemical parameters and the QSAR results revealed the possibility of strong interactions between the studied inhibitors and metal surface. QSAR analysis on the quantum chemical parameters obtained with B3LYP/6-31G (d,p) method show that a combination of two quantum chemical parameters to form a composite index provides the best correlation with the experimental data.

Corrosion inhibition of aluminum in biodiesel by ethanol extracts of Rosemary leaves

Rosemary extract was used to control aluminum corrosion in biodiesel. Weight loss and polarization methods were used to test corrosion inhibitor efficiency. Surface morphology was tested by scanning electron microscopy (SEM). The inhibition efficiency increased with increase in extract concentration and decreased with temperature, suggesting the occurrence of physical adsorption. Adsorption of extract on aluminum surface is spontaneous and obeys Langmuir's isotherm. Polarization measurements revealed that Rosemary extract act as a mixed-type inhibitor with predominant anodic effectiveness. The activation energy as well as the heat of adsorption were calculated and discussed.

Performance assessment of poly (methacrylic acid)/silver nanoparticles composite as corrosion inhibitor for aluminium in acidic environment

This article reports the preparation of poly (methacrylic acid)/silver nanoparticles composite (PMAA/AgNPs) by in situ mixing of aqueous solutions of PMAA and 1 mM AgNO3 with natural honey as reducing and stabilizing agent. The prepared PMAA/AgNPs composite was characterized by UV–vis spectroscopy, Fourier transformed infrared, X-ray diffraction and energy dispersive spectroscopy (EDS) while the morphology of the AgNPs in the composite was obtained by transmission electron microscopy (TEM). TEM results revealed that the AgNPs were spherical in shape. The performance of PMAA/AgNPs composite as anticorrosion material for Al in acidic environment was examined by electrochemical, weight loss methods, complemented by surface analysis characterization with scanning electron microscopy (SEM), EDS and water contact angle measurements. Results obtained indicate that PMAA/AgNPs composite is effective corrosion inhibitor for Al in an acid-induced corrosive environment. Inhibition efficiency increased with increase in composite concentration but decreased with rise in temperature. From potentiodynamic polarization results, PMAA/AgNPs composite is found to function as a mixed-type corrosion inhibitor. The adsorption of the composite onto Al surface was found to follow El-Awady et al. adsorption isotherm model. SEM, EDS and water contact angle results confirmed the adsorption of the composite on Al surface.

Electrochemical, thermodynamic, surface and theoretical investigation of 2-aminobenzene-1,3-dicarbonitriles as green corrosion inhibitor for aluminum in 0.5 M NaOH

The influence of 2-aminobenzene-1,3-dicarbonitriles derivatives (ABDNs) namely 5′-amino-2,4-dihydroxy-4″-methyl-1,1′:3′,1″-terphenyl-4′,6′-dicarbonitrile (ABDN-1), 5′-amino-2,2″,4-trihydroxy-1,1′:3′,1″-terphenyl-4′,6′-dicarbonitrile (ABDN-2) and 5′-amino-2,3″,4-trihydroxy-1,3-methoxy, 1′:3′,1″-terphenyl-4′,6′-dicarbonitrile (ABDN-3) on aluminum corrosion in 0.5M NaOH was investigated using chemical and electrochemical methods. Potentiodynamic polarization study reveals that 2-aminobenzene-1,3-dicarbonitriles were mixed type inhibitors. Adsorption of 2-aminobenzene-1,3-dicarbonitriles on aluminum surface in 0.5M NaOH follows the Langmuir adsorption isotherm. Adsorption of inhibitors on aluminum surface was studied using SEM and EDX spectroscopy examinations. Quantum chemical calculations support the weight loss and electrochemical observations.

Electroanalytical, quantum and surface characterization studies on imidazole derivatives as corrosion inhibitors for aluminum in acidic media

In this study, the effect of imidazole derivatives on the inhibition of aluminum corrosion in 0.5M HCl has been studied using potentiodynamic polarization, electrochemical impedance spectroscopy (EIS) and electrochemical frequency modulation (EFM) measurements. The results show that all imidazole derivatives are good inhibitors, and inhibition efficiency follows the order: B>A. Polarization curves demonstrated that the imidazole derivatives were of mixed-type inhibitors. The adsorption of each inhibitor on aluminum surface obeys Frumkin adsorption isotherm. Surface morphology studies were done using scanning electron microscopy (SEM) to characterize the film formed on aluminum surface. Quantum chemical calculations show that imidazole derivatives can adsorb on the aluminum surface through the nitrogen atoms as well as π-electrons in the imidazole ring.

Aqueous extract of leaves of Morinda tinctoria as a corrosion inhibitor for aluminum in sulphuric acid medium

The corrosion inhibition of aluminum in sulphuric acid using an aqueous extract of leaves of Morinda tinctoria (MT) was studied with weight loss and electrochemical techniques. It was found that the MT extract acts as a good inhibitor for aluminum corrosion in the sulphuric acid medium. The inhibition efficiency of the inhibitor is found to increase with the increase in concentration of the acid. Synergistic effect increased the inhibition efficiency of MT in the presence of halide additives. The process of adsorption of the inhibitor on the metal surface is found to obey Freundlich isotherm. The adsorbed film on the metal surface has been analyzed by FT-IR and SEM-EDXS studies. Polarization measurements showed that MT extract is a mixed type inhibitor. Impedance results indicate adsorption of the MT on the Al surface is through charge transfer.