Aluminium as the anode in primary alkaline batteries

Sarangapani, K.B.; Balaramachandran, V.; Kapali, V.; Iyer, S. Venkatakrishna; Potdar, M. G.

doi:10.1016/0376-4583(85)90112-8

Cited by 13 publications

(2 citation statements)

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“…The corrosion inhibitive effects of tungstates have been much reported. However, most of these reports have been on its inhibitive effects on iron, carbon steels, and stainless steels (ferrous metals and alloys) [215,[397][398][399][400][401][402][403][404], with only few reports on tunsgtate inhibition of aluminum corrosion [405][406][407][408]. Though the toxicity of tungsten/tungstate have hitherto been considered to be low [409][410][411][412], recent reports have brought it into scrutiny as an emergent toxicant , and thus the likelihood of tungsten/tungstate use coming under strict regulatory control in the near future is significant.…”

Section: Toxicity Concerns With Respect To Plausible Strategies For Mmentioning

confidence: 99%

The Sealing Step in Aluminum Anodizing: A Focus on Sustainable Strategies for Enhancing Both Energy Efficiency and Corrosion Resistance

2020

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Increasing demands for environmental accountability and energy efficiency in industrial practice necessitates significant modification(s) of existing technologies and development of new ones to meet the stringent sustainability demands of the future. Generally, development of required new technologies and appropriate modifications of existing ones need to be premised on in-depth appreciation of existing technologies, their limitations, and desired ideal products or processes. In the light of these, published literature mostly in the past 30 years on the sealing process; the second highest energy consuming step in aluminum anodization and a step with significant environmental impacts has been critical reviewed in this systematic review. Emphasis have been placed on the need to reduce both the energy input in the anodization process and environmental implications. The implications of the nano-porous structure of the anodic oxide on mass transport and chemical reactivity of relevant species during the sealing process is highlighted with a focus on exploiting these peculiarities, in improving the quality of sealed products. In addition, perspective is provided on plausible approaches and important factors to be considered in developing sealing procedures that can minimize the energy input and environmental impact of the sealing step, and ensure a more sustainable aluminum anodization process/industry.Coatings 2020, 10, 226 2 of 55 sealing methods. Furthermore, the applicability of another hitherto popular sealing process; chromate sealing, is currently limited to essential parts in the aerospace industry due to toxicological, health, and environmental implications traced to Cr(VI) employed in the process [7][8][9][10][11][12][13][14][15][16]. On the other hand, the advantages of another industrially utilized sealing process; the nickel fluoride (cold) sealing process is limited by the toxicity of nickel salts which narrows its range of application, and introduces added costs due to post-sealing wastewater treatments and management [17][18][19][20]. Further efforts at sealing anodized aluminum at temperatures lower than that used in hydrothermal (high temperature) sealing, have led to much variety in the chemical constitution and operating temperatures of sealing baths [21]. On the basis of temperature at which the sealing step is carried out, sealing can be classified into three major categories; high temperature, mid-temperature, and room-temperature or cold sealing. In this work sealing at temperatures from 0 to 40 • C is classified as low temperature sealing, from ≥ 40 • C to 70 • C as intermediate or mid temperature sealing, and sealing at temperatures > 70 • C as high temperature sealing.

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Section: Toxicity Concerns With Respect To Plausible Strategies For Mmentioning

confidence: 99%

The Sealing Step in Aluminum Anodizing: A Focus on Sustainable Strategies for Enhancing Both Energy Efficiency and Corrosion Resistance

2020

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“…However, in alkaline electrolytes pure aluminum self-discharges readily by corrosion, resulting in utilization of much less than 100%. With the purpose of improving the behavior of the aluminum anode, two methods are usually used: (1) alloying aluminum with other elements [13][14][15]; (2) modifying the electrolyte by adding inhibitors [15][16][17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Influences of zinc oxide and an organic additive on the electrochemical behavior of pure aluminum in an alkaline solution

Wang

Shao

et al. 2005

J Appl Electrochem

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The corrosion behavior of pure aluminum in inhibited and uninhibited 4 M KOH was investigated by means of hydrogen collection, polarization curve measurement and electrochemical impedance spectroscopy (EIS). The results showed that the corrosion of pure aluminum was greatly inhibited by the addition of ZnO and dimethyl amine epoxy propane (designated as DE). EIS and EDAX analyses revealed that ZnO produces its effect by depositing on the aluminum surface, which increases the overpotential of hydrogen evolution. It was also found that the addition of DE could greatly improve the deposition of zinc layers.

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Characterisation of different grades of commercially pure aluminium as prospective galvanic anodes in saline and alkaline battery electrolyte

et al. 1989

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Aluminium as the anode in primary alkaline batteries

Cited by 13 publications

References 1 publication

The Sealing Step in Aluminum Anodizing: A Focus on Sustainable Strategies for Enhancing Both Energy Efficiency and Corrosion Resistance

The Sealing Step in Aluminum Anodizing: A Focus on Sustainable Strategies for Enhancing Both Energy Efficiency and Corrosion Resistance

Influences of zinc oxide and an organic additive on the electrochemical behavior of pure aluminum in an alkaline solution

Characterisation of different grades of commercially pure aluminium as prospective galvanic anodes in saline and alkaline battery electrolyte

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