Microstructural and mechanical properties of Al-Zn alloy 7075 during RRA and triple aging

Reda, Y.; Yehia, Hossam M.; El-Shamy, A. M.

doi:10.1016/j.ejpe.2021.12.001

Cited by 41 publications

(23 citation statements)

References 49 publications

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“…This is because of the molecular barrier created by adsorption of the molecules the root extract on that mild steel surface. The same trend of activation energy and inhibitor concentrations has been reported on the extracts of jujube leaves, black pepper [24], breadfruit peel [4], leaf and stem extract of Phyllanthus mellerianus [2,10], jatropha leaf [29] and piper nigrum extract [30]. The corrosion mechanism can be attributed to physical adsorption (physisorption) on the rationale that the activation energy was higher in the presence of the inhibitor.…”

Section: Activation Energy (Ea) Of Root Extract Of Phyllanthus Meller...supporting

confidence: 68%

“…Table 4 shows that the 1/y values are less than one, indicating that the inhibitors occupied more than one active site and functioned well in 1.5 M HCl. The inhibitors' y values decreased as temperature increased, implying that weak Van der Waal forces were holding the inhibitors to the mild steel surface [25][26][27][28][29]. This was also confirmed by the physical adsorption properties of the inhibitors.…”

Section: Corrosion Inhibition and Adsorption Isotherms Of Mild Steel ...mentioning

confidence: 81%

“…The inhibitors' Langmuir isotherm values were discovered to be large (> 1), indicating a physical adsorption process between the inhibitors and the mild steel surface. The inhibitor has a strong interaction with the surface, and the adsorption process is based on the Langmuir isotherm values for both inhibitors (k > 1) [27][28][29]. El-Awady isotherms characterise the adsorption sites on the mild steel surface.…”

Section: Corrosion Inhibition and Adsorption Isotherms Of Mild Steel ...mentioning

confidence: 99%

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Phytochemical Constituent and Anti-corrosion Properties of the Root Extract of Phyllanthus mellerianus (Nvo-nkwu) Plant on Mild Steel in 1.5M HCl Medium

Nsude

Orie

2022

CSIJ

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The research reports on the phytochemical constituents and anti-corrosion properties of the root extract of Phyllanthus mellerianus on mild steel in 1.5M HCl. The powdered root was extracted with ethanol and concentrated with a rotary evaporator. The phytochemical constituents’ were achieved through GC-MS, FTIR and wet analysis. The anticorrosion properties were investigated via weight loss, hydrogen evolution techniques, and SEM analysis. The phytochemical investigation reveals the presence of tannins, flavonoids, phenols, and terpenoids at reasonable percentages. At different temperatures of 303K, 313K, and 323K, the inhibition efficiency, enthalpy, entropy, activation energy, Gibbs free energy, and adsorption isotherms were extrapolated with some models. The inhibition efficiency increased with an increase in the concentration of the extract, an indication of the inhibitive property of the root extract. This was supported through the extrapolation of Gibbs free energy, activation energy, enthalpy, and entropy change. The thermodynamic variable shows that the mechanism of inhibition was physisorption, whereas the kinetics study confirmed a first-order kinetic on the corrosion of mild steel in hydrochloric acid. The values of the linear regression R2 confirm the inhibitive impact of the root extract on mild steel in an acid medium. The presence of the heteroatoms N, O, and S in the root extracts of Phyllanthus mellerianus has been attributed to their inhibitory effectiveness.

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Section: Activation Energy (Ea) Of Root Extract Of Phyllanthus Meller...supporting

confidence: 68%

Section: Corrosion Inhibition and Adsorption Isotherms Of Mild Steel ...mentioning

confidence: 81%

Section: Corrosion Inhibition and Adsorption Isotherms Of Mild Steel ...mentioning

confidence: 99%

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Phytochemical Constituent and Anti-corrosion Properties of the Root Extract of Phyllanthus mellerianus (Nvo-nkwu) Plant on Mild Steel in 1.5M HCl Medium

Nsude

Orie

2022

CSIJ

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“…Corrosion is a serious and extremely costly problem especially in petrochemicals and petroleum production operations 1 , 2 . Besides the high potential to employ more advanced corrosion-resistant components, carbon steel tills are the main fabricated material used for the huge pipeline’s construction in the different crude oil processing stages such as extraction, transmission, and storage Carbon steel pipes have been widely employed in transporting gases and liquids 3 , 4 .…”

Section: Introductionmentioning

confidence: 99%

Adsorption, thermodynamic, and quantum chemical investigations of an ionic liquid that inhibits corrosion of carbon steel in chloride solutions

Abbas

Ismail

Zakaria

et al. 2022

Sci Rep

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The purpose of this work lies in the use of ionic liquids as corrosion inhibitors due to the difficulty in some oil fields with the solubility of corrosion inhibitors and these materials can be miscible with water and thus provide a solution to such problems in the industry. The second purpose is concerned with the lower toxicity of these compounds compared with the most common corrosion inhibitors. The study covered the corrosion inhibition performance of the ionic liquid 1-butyl-3-methylimidazolium trifluoromethyl sulfonate ([BMIm]TfO) for carbon steel in 3.5% NaCl solutions. The study comprised electrochemical, adsorption, and quantum chemical investigations. The results manifested that [BMIm]TfO can be considered a promising corrosion inhibitor and the inhibition efficacy intensifies as the concentration rises. The observed inhibitive effect can be correlated to the adsorption of the ionic liquid species and the creation of protecting films on the surface. The mode of adsorption follows the Langmuir adsorption isotherm. The polarization results showed that the ionic liquid [BMIm]TfO functions as a mixed inhibitor. Reliance of the corrosion influence on the temperature in the existence and absence of [BMIm]TfO was demonstrated in the temperature range of 303–333 K using polarization data. Activation parameters were determined and discussed. The observed inhibition performance of [BMIm]TfO was correlated with the electronic properties of the ionic liquid using a quantum chemical study.

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“…The relation between the materials and their respective solution, T6 and RRA heat treatments indicates noticeable change in the hardness behavior of the reference alloy from the quenched to the T6 condition, which suggest a solid solution derived from the heat treatment and the respective formation of precipitates. A slightly increase in the hardness behavior is observed in the reference alloy from the T6 to the RRA treatment which suggest intra and transgranular precipitation [4]. On the other hand, the CNT/Al7075 composite display a noticeable improved in hardness in comparison with the reference alloy.…”

mentioning

confidence: 87%

Hardness Behavior in CNT/Al7075 RRA Heat Treated Composites

Vargas-Rodriguez¹,

Cardoso-Lozano²,

Mayen-Chaires³

et al. 2022

Microscopy and Microanalysis

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Microstructural and mechanical properties of Al-Zn alloy 7075 during RRA and triple aging

Cited by 41 publications

References 49 publications

Phytochemical Constituent and Anti-corrosion Properties of the Root Extract of Phyllanthus mellerianus (Nvo-nkwu) Plant on Mild Steel in 1.5M HCl Medium

Phytochemical Constituent and Anti-corrosion Properties of the Root Extract of Phyllanthus mellerianus (Nvo-nkwu) Plant on Mild Steel in 1.5M HCl Medium

Adsorption, thermodynamic, and quantum chemical investigations of an ionic liquid that inhibits corrosion of carbon steel in chloride solutions

Hardness Behavior in CNT/Al7075 RRA Heat Treated Composites

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