The corrosion and electrochemical behaviour of pure aluminium in alkaline methanol solutions

Wang, Junbo; Wang, Jianming; Shao, Haibo; Zhang, Jianqing; Chen, Cao

doi:10.1007/s10800-007-9310-8

Cited by 64 publications

(42 citation statements)

References 25 publications

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“…Alcohols used to form both aqueous and non-aqueous alkaline KOH solutions for aluminium corrosion tests include methanol [162,163], ethanol [164] and propanol [165]. Without any water, there was no hydrogen evolution from the surface of the aluminium in these alkaline alcohol solutions.…”

Section: Alcoholsmentioning

confidence: 99%

“…The open-circuit corrosion current density was extremely low at 0.0976 mA cm À2 in a 4 mol dm À3 KOH solution at 25 C [164]. These solutions almost completely inhibited the oxidation of aluminium as replacing water with the other solvents decreases the ionic conductivity of the electrolyte and the hydration of the surface product layer [161,162]. The rate of oxidation of the aluminium was improved upon mixing the alkaline alcohol solutions with water, although still inferior to the performance in a 100% aqueous solution.…”

Section: Alcoholsmentioning

confidence: 99%

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Developments in electrode materials and electrolytes for aluminium–air batteries

Egan¹,

León²,

Wood³

et al. 2013

Journal of Power Sources

403

191

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h i g h l i g h t s< Discussion of the rationale to choose a suitable alloy for Aleair battery. < Effect of the properties and preparation route to enhance the oxidation of Al. < Effect of the inhibitors on the anode oxidation in the alkaline electrolyte. This review shows the influence of the materials, including: aluminium alloy, oxygen reduction catalyst and electrolyte type, in the battery performance. Two issues are considered: (a) the parasitic corrosion of aluminium at open-circuit potential and under discharge, due to the reduction of water on the anode and (b) the formation of a passive hydroxide layer on aluminium, which inhibits dissolution and shifts its potential to positive values. To overcome these two issues, super-pure (99.999 wt%) aluminium alloyed with traces of Mg, Sn, In and Ga are used to inhibit corrosion or to break down the passive hydroxide layer. Since high-purity aluminium alloys are expensive, an alternative approach is to add inhibitors or additives directly into the electrolyte. The effectiveness of binary and ternary alloys and the addition of different electrolyte additives are evaluated. Novel methods to overcome the self-corrosion problem include using anionic membranes and gel electrolytes or alternative solvents, such as alcohols or ionic liquids, to replace aqueous solutions. The air cathode is also considered and future opportunities and directions for the development of aluminiumeair cells are highlighted.

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Section: Alcoholsmentioning

confidence: 99%

Section: Alcoholsmentioning

confidence: 99%

Developments in electrode materials and electrolytes for aluminium–air batteries

Egan¹,

León²,

Wood³

et al. 2013

Journal of Power Sources

403

191

View full text Add to dashboard Cite

show abstract

“…When immersed in an alkaline medium containing KOH or NaOH, aluminum can suffer anodic dissolution releasing AlO -and Al(OH) -4 ions. This aluminum species tends to form a passive layer of Al(OH) 3 85 through the reduction of electrolytes such as water, 86 or methanol, 87 causing hydrogen evolution in the process. 87,88 The exposure of different metals to biodiesel and the presence of dissolved oxygen can increase the corrosivity of the fuel.…”

Section: Metallic Corrosion Mechanisms and The Formation Of Corrosionmentioning

confidence: 99%

“…This aluminum species tends to form a passive layer of Al(OH) 3 85 through the reduction of electrolytes such as water, 86 or methanol, 87 causing hydrogen evolution in the process. 87,88 The exposure of different metals to biodiesel and the presence of dissolved oxygen can increase the corrosivity of the fuel. Different factors may be involved in the corrosion processes in biodiesel, such as changes in the acid values, increases in water content, the presence of oxidation products, the presence of metal species and changes in the structural characteristics of the biodiesel.…”

Section: Metallic Corrosion Mechanisms and The Formation Of Corrosionmentioning

confidence: 99%

The oxidative stability of biodiesel and its impact on the deterioration of metallic and polymeric materials: a review

Zuleta¹,

Baena

Ríos³

et al. 2012

J. Braz. Chem. Soc.

142

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O objetivo deste artigo é analisar as principais questões com relação às estabilidades oxidativa e de armazenamento de biodiesel e como elas afetam diferentes materiais metálicos e poliméricos presentes em peças de automóvel e em estruturas de armazenamento de biodiesel. Adicionalmente, este trabalho apresenta uma revisão das técnicas para a medição da estabilidade oxidativa e para avaliação da degradação de materiais metálicos e poliméricos. Quando biodiesel é oxidado, ocorre uma série de mudanças nas suas propriedades, tais mudanças afetam não só a qualidade do biodiesel, mas também as propriedades dos materiais que estão em contato com o biodiesel. Com a oxidação, propriedades do biodiesel como o índice de acidez, índice de peróxidos e viscosidade aumentam, entretanto os índices de iodo e teor de ésteres metílicos diminuem. As alterações das propriedades químicas e físicas do biodiesel podem afetar a integridade e a estabilidade dos materiais que estão em contato com o combustível. A atual situação relacionada com a estabilidade dos materiais revistos neste artigo poderia limitar o uso extensivo de biodiesel, como tem sido proposto em vários países, e deveria ser considerada como um fenômeno de grande importância na tecnologia de biodiesel.The purpose of this paper is to analyze the main issues concerned with the oxidative and storage stabilities of biodiesel and how they affect different metallic and polymeric materials present in automotive parts and in biodiesel storage structures. In addition, this work presents a review of the techniques used for measuring the oxidative stability and for evaluating the degradation of metallic and polymeric materials. When biodiesel is oxidized, a series of changes in its properties occurs. These changes not only affect biodiesel quality, but also the properties of the materials that are in contact with it. Upon oxidation, biodiesel properties like the acid value, peroxide value and viscosity increase, while the iodine value and the content of methyl esters decrease. The changes in the chemical and physical properties of biodiesel can affect the integrity and stability of the material. The situation reviewed in this paper, which talks about the stability of materials, could limit the extensive use of biodiesel. Such measures have been proposed in several countries, and it is a topic of great importance for biodiesel technology.

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“…It has been reported that anodic dissolution of aluminium in the alkaline medium takes place through a stepwise addition of surface hydroxyl species, culminating in the chemical dissolution of Al (OH) 3 in the presence of surface oxide film. The overall anodic reaction taking place in the corrosion of aluminium in the alkaline solution is represented as under [22][23][24][25] …”

Section: Potentiodynamic Polarization Studymentioning

confidence: 99%

Electrochemical approach of Kalmegh leaf extract on the corrosion behavior of aluminium alloy in alkaline solution

Chaubey¹,

Singh²,

Quraishi

2016

Int J Ind Chem

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Introduction The effect of Kalmegh leaf extract (KLE) on the corrosion behavior of aluminium in 1 M NaOH solution was studied using electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization (PDP) studies.Results Inhibition efficiency (g%) increased with increasing the concentration of extract and maximum inhibition efficiency observed is 82.24 and 82.45% from EIS and PDP studies, respectively, at higher concentration. Conclusion The adsorption of the inhibitor on aluminium surface was in accordance with the Langmuir adsorption isotherm. Potentiodynamic polarization study showed mixed type inhibition with predominantly cathodic effect. SEM and AFM study was carried out to support the experimental inhibition data.

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The corrosion and electrochemical behaviour of pure aluminium in alkaline methanol solutions

Cited by 64 publications

References 25 publications

Developments in electrode materials and electrolytes for aluminium–air batteries

Developments in electrode materials and electrolytes for aluminium–air batteries

The oxidative stability of biodiesel and its impact on the deterioration of metallic and polymeric materials: a review

Electrochemical approach of Kalmegh leaf extract on the corrosion behavior of aluminium alloy in alkaline solution

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