The Effects of Heat Treatment on the Electrochemical Properties and Corrosion of Aluminium Alloy AA8011 in an Aqueous Acid Media

Kelechukwu, B. Okeoma; Israel, O. Owate; Emeka, E. Oguzie; Ihebrodike, M. Mejeha; Lebe, Nnanna; Joseph, Eze

doi:10.18052/www.scipress.com/ilcpa.24.17

Cited by 3 publications

(6 citation statements)

References 15 publications

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“…Such behavior has been reported in other publications as well . Double-layer capacitance decreases following Se addition to Ru/C, which indicates an increase in charge-transfer resistance for both hydride and oxide formation originating from Ru and Se interactions . In Ru/C, an anodic current corresponding to Ru–OH formation and a cathodic current corresponding to the reduction of Ru–OH can be detected.…”

Section: Resultssupporting

confidence: 85%

“…However, after heat treatment, there is a single anodic peak at 0.90 V vs RHE corresponding to Se oxidation, thus indicating stabilization of the Ru/C moiety. This observed increase in stability of heat treated RuSe/C is due to an improved alloy formation between the metals, thereby preventing the formation of Se and Ru oxides. , The CV of RuSeMo/C had similar features as that for RuSe/C, and is shown in the Supporting Information, Figure S1.…”

Section: Resultsmentioning

confidence: 77%

“…Representative XRD profiles of Ru/C and 42 Double-layer capacitance decreases following Se addition to Ru/C, which indicates an increase in charge-transfer resistance for both hydride and oxide formation originating from Ru and Se interactions. 43 In Ru/C, an anodic current corresponding to Ru−OH formation and a cathodic current corresponding to the reduction of Ru−OH can be detected. Comparing the CVs of RuSe/C and Ru/C, it is clear that Se modification significantly suppresses Ru−OH formation.…”

Section: Resultsmentioning

confidence: 97%

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Electrochemical and In Situ Spectroscopic Evidences toward Empowering Ruthenium-Based Chalcogenides as Solid Acid Fuel Cell Cathodes

Ghoshal

Jia

et al. 2016

ACS Catal.

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A low-cost Ru-based chalcogenide catalyst has been used as a cathode catalyst in solid acid fuel cells (SAFC). With sequential addition of Se and Mo on Ru/C in a controlled manner, the resulting physical and electrochemical properties have been discussed in detail. The oxygen reduction reaction (ORR) in the presence of phosphoric acid has been performed to appraise the tolerance of the catalyst in the presence of phosphate anions. Considering the phosphate-rich environment during cell operation, this study is especially relevant for designing catalysts for s. In order to estimate the coverage of phosphate anions on active sites, a semiquantitative analysis of the corresponding Tafel plots has been done. Electrochemical, thermogravimetric, and in situ X-ray absorption spectroscopic experiments have been performed to get a deeper perception of the catalyst–electrolyte interface and account for the high stability of the chalcogenide catalyst at room temperature as well as at elevated temperature. Steady-state polarization curves in SAFC have been collected for over 120 h using the chalcogenide catalyst operating at 250 °C.

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Section: Resultssupporting

confidence: 85%

Section: Resultsmentioning

confidence: 77%

Section: Resultsmentioning

confidence: 97%

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Electrochemical and In Situ Spectroscopic Evidences toward Empowering Ruthenium-Based Chalcogenides as Solid Acid Fuel Cell Cathodes

Ghoshal

Jia

et al. 2016

ACS Catal.

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“…Table 3: Corrosion potential and polarization resistance of the aluminum packaging foil for cheese in the presence and absence of the magnetic field for a sample area of 1 cm 2 in a 0.3 % of mass fractions of NaCl medium Tabela 3: Korozijski potencial in polarizacijska upornost aluminijeve embala`ne folije za sir ob prisotnosti in odsotnosti magnetnega polja za vzorec s povr{ino 1 cm 2 Other authors observed the presence of the AlSiFe, AlFe, AlFeMn, and AlSi phases in alloys with the compositions similar to the alloys presented in this study. [17][18][19] Okeoma Kelechukwu et al 18 observed the AlFeMn and MnFe particles in the AA8011 aluminum alloy containing 0.1 % of Mn used as a packaging foil. They noticed that the presence of the Fe and Si elements in the material support the precipitation of the dispersoids and decreases the solubility of Mn in a solid solution.…”

Section: Corrosion Morphology Of Aluminum Packaging Foilmentioning

confidence: 99%

Corrosion behavior and the weak-magnetic-field effect of aluminum packaging paper

Zazi¹,

Chopart²,

Bilek³

2016

Mater. Tehnol.

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Aluminum can be absorbed through the digestive system from water and drinks and the food that contains natural traces and processed food or the food cooked in aluminum cookware. Some studies show that the people exposed to high levels of aluminum may develop kidney, bone and brain diseases. Aluminum foil (AlFeSi) is daily used as packaging for food and drugs stored in the refrigerator where an electric motor induces a magnetic field of a few microteslas. The purpose of this work is to study the corrosion behavior of various aluminum packaging foils and the effect of a weak magnetic field on the morphology and the corrosion kinetics in the 0.3 % and 3 % of mass fractions of NaCl solutions. The mean results for various aluminum packaging foils show that localized corrosion is controlled by the electrochemical potentials of different phases constituting the aluminum foil and the concentration of the precipitates from the other phases. The morphology and the corrosion kinetics of aluminum packaging foil in the 0.3 % and 3 % of mass fractions of NaCl solutions are different with and without an application of a weak magnetic field. Electrochemical tests applied to cheese packaging paper show that the introduction of a magnetic field decreases the polarization resistance, the potential of passivation and the value of the open-circuit potential at the beginning of the corrosion; however, its passivation-current density increases at the beginning of the corrosion. The values of the open-circuit potential with and without a weak magnetic field are the same after thirty days of corrosion. Keywords: aluminum packaging foil, weak magnetic field, aluminum alloys, corrosion, passivation Aluminij se lahko absorbira v prebavni sistem iz vode in pija~in iz hrane, ki vsebuje naravne sledi ter obdelane hrane ali hrane, kuhane v aluminijasti posodi. Nekatere {tudije ka`ejo, da ljudje izpostavljeni visokemu nivoju aluminija, lahko zbolijo na ledvicah, kosteh in mo`ganih. Aluminijeva folija (AlFeSi), ki se dnevno uporablja kot embala`a za hrano in zdravila, se hrani v hladilniku, kjer elektromotor inducira magnetno polje jakosti nekaj mikroteslov. Namen {tudije je predstavitev korozijskega obna{anja razli~nih aluminijevih embala`nih folij in vpliv {ibkega magnetnega polja na morfologijo in kinetiko korozije v 0,3 % in 3 % raztopini NaCl. Rezultati ka`ejo, da je pri razli~nih aluminijevih folijah lokalna korozija kontrolirana z elektrokemijskim potencialom razli~nih faz, ki sestavljajo aluminijevo folijo in s koncentracijo izlo~kov drugih faz. Morfologija in kinetika korozije aluminijevih embala`nih folij v 0,3 % in 3 % raztopini NaCl, sta razli~ni pri prisotnosti ali odsotnosti {ibkega magnetnega polja. Elektrokemijski preizkusi, izvr{eni na ovojni foliji za sir, so pokazali, da prisotnost magnetnega polja na za~etku korozije zmanj{a polarizacijsko odpornost, potencial pasivacije in vrednost potenciala odprtega kroga, vendar pa gostota pasivacijskega toka nara{~a. Vrednost potenciala odprtega kroga je po tridesetih dneh enaka, ob pris...

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“…8006 aluminium alloys are mostly preferred by foil and sheet aluminium manufacturers for food packaging applications (Kurt et al, 2013;Kelechukwu et al, 2014;Rahimi et al, 2015). The twin-roll casting method is ideal for the production of foil aluminium because of cost-effectiveness and fewer production stages.…”

Section: Introductionmentioning

confidence: 99%

Corrosion behaviour of twin-roll cast 8006 aluminium alloy foil with different thicknesses for the food packaging industry

Eken

Sarıoğlu

Küçük

2021

JEDT

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Purpose The purpose of this paper is to investigate and find out the surface and electrochemical behaviours of twin roll cast (TRC) 8006 aluminium alloy with different thicknesses due to the cold rolling rates after the TRC process. Design/methodology/approach The 8006 aluminium alloys are mostly used for the food packaging industry, as they are corrosion resistant, lightweight and shapable materials. The present work investigates the surface and corrosion behaviours of 8006 aluminium alloys at different thicknesses. TRC aluminium alloys were cold-rolled at two different reduction rates before investigation. X-ray diffraction (XRD) and energy dispersive spectroscopy (EDX) tests were used to examine the phase and elemental analyses. FE-SEM and 3D profilometry also used to observe surface morphology. Open circuit potential (OCP), potentiodynamic polarization and electrochemical impedance spectroscopy tests (EIS) were carried out to find out corrosion behaviours. The results show that the more cold rolling reduction (CRR), the more corrosion rate and surface affection of the TRC 8006 aluminium alloys. Findings According to the electrochemical tests (OCP, potentiodynamic polarization test and EIS) and surface morphology results (such as SEM, 3D profilometry and XRD) the more the rolling rate the less the corrosion resistance. Originality/value First corrosion behaviour investigation of twin-rolled 8006 Al alloys using electrochemical techniques. First investigation of CRR effects on electrochemical corrosion behaviour of 8006 Al alloys with 3.5 wt.% NaCl solution using EIS. First investigation of 8006 Al alloys as a food packaging material with electrochemical ways.

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The Effects of Heat Treatment on the Electrochemical Properties and Corrosion of Aluminium Alloy AA8011 in an Aqueous Acid Media

Cited by 3 publications

References 15 publications

Electrochemical and In Situ Spectroscopic Evidences toward Empowering Ruthenium-Based Chalcogenides as Solid Acid Fuel Cell Cathodes

Electrochemical and In Situ Spectroscopic Evidences toward Empowering Ruthenium-Based Chalcogenides as Solid Acid Fuel Cell Cathodes

Corrosion behavior and the weak-magnetic-field effect of aluminum packaging paper

Corrosion behaviour of twin-roll cast 8006 aluminium alloy foil with different thicknesses for the food packaging industry

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