Corrosion characterisation of alumina–magnesium metal matrix composites

Bakkar, Ashraf; Neubert, Volkmar

doi:10.1016/j.corsci.2006.07.002

Cited by 77 publications

(31 citation statements)

References 24 publications

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“…Following the authors' previous work [24,[26][27][28] on the corrosion of Mg-based alloys and composites in chloride-containing alkaline solutions the break-through-potential (E p ) is the main determining parameter for corrosion characterisation. Fig.…”

Section: Polarisation Of the Monolithic Alloysmentioning

confidence: 99%

“…Contained in these discs were the C-fibres/Mg composite blocks with dimensions of 120 mm × 120 mm × 35 mm, see Ref. [24]. Specimens were cut into small blocks 15 mm × 15 mm × 7 mm.…”

Section: Samplesmentioning

confidence: 99%

“…The equipment used was described in Ref. [24]. The carbon fibres (about 25 vol.%) were distributed quasi-isotropically in the horizontal plane.…”

Section: Mg Mmcsmentioning

confidence: 99%

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Corrosion behaviour of carbon fibres/magnesium metal matrix composite and electrochemical response of its constituents

Bakkar

Neubert

2009

Electrochimica Acta

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Section: Polarisation Of the Monolithic Alloysmentioning

confidence: 99%

“…Contained in these discs were the C-fibres/Mg composite blocks with dimensions of 120 mm × 120 mm × 35 mm, see Ref. [24]. Specimens were cut into small blocks 15 mm × 15 mm × 7 mm.…”

Section: Samplesmentioning

confidence: 99%

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Corrosion behaviour of carbon fibres/magnesium metal matrix composite and electrochemical response of its constituents

Bakkar

Neubert

2009

Electrochimica Acta

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“…Some documents indicated that magnesium alloy corrosion always began from the alloys substrate, Mg þ would appear in the corrosion process [29,30]. Consequently, based on these previous studies and analytical observations, the corrosion mechanism of the three Mg alloys in simulated sweat solution was represented.…”

Section: Corrosion Mechanismmentioning

confidence: 99%

Corrosion behavior of 3C magnesium alloys in simulated sweat solution

Zhang

Tao

2011

Materials & Corrosion

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AZ series Mg alloys AZ31, AZ61, and AZ80 are widely applied in 3C (computer, communication, and consumer electronic) industry. Their corrosion characters in simulated sweat solution have been investigated by electrochemical technology, surface analysis, and pH measurements. Electrochemical test results showed that the three magnesium alloys revealed different corrosion resistance (R t ) in simulated sweat solution, R t(AZ31) < R t(AZ61) < R t(AZ80) . Three major components of simulated sweat solution played different roles during corrosion processes. Lactic acid was a kind of strong erosive medium for the magnesium alloys, and NaCl can induce pitting corrosion on alloys surface, while urea acted as a corrosion inhibitor. The corroded surface morphology of the three magnesium alloys was observed using scanning electron microscopy (SEM) and corrosion products were analyzed by X-ray diffraction (XRD). Result of pH measurement tests showed that there were differences in climbing speed and final values of pH for the three magnesium alloys in simulated sweat solution.

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“…The reaction produces hydroxyl ions which migrate to the anode through the electrolyte to form zincate and a potential of 0.4 V (Equation 1). Another of the main problems for the air-cathode is related to the accumulation of the water produced during the reaction, which accelerates the degradation of the electrolyte and induces flooding at the gas diffusion cathode; also, another reaction between water and zinc occurs, resulting in hydrogen gas generation that causes severe corrosion of the metal anode (Equation 5) [11][12][13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Double-layer membrane cathode with improved oxygen diffusivity in zinc-air batteries

Ugalde

Naguib

2017

Energy Storage Materials

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. "Double-layer membrane cathode with improved oxygen diffusivity in zinc-air batteries." Energy Storage Materials 8 (2017): 1-9. Doi: 10.1016/j.ensm.2017.03.009 Copyright/LicenseThis work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License. To view a copy of this license, visit http://creativecommons.org/licenses/by-nc-nd/4.0/. How to cite TSpace itemsAlways cite the published version, so the author(s) will receive recognition through services that track citation counts, e.g. Scopus. If you need to cite the page number of the author manuscript from TSpace because you cannot access the published version, then cite the TSpace version in addition to the published version using the permanent URI (handle) found on the record page.This article was made openly accessible by U of T Faculty. Please tell us how this access benefits you. Your story matters. Double-Layer Membrane Cathode with Improved Oxygen Diffusivity in Zinc-Air Batteries AbstractThe commercialization of portable zinc-air batteries has been limited to the coin cell shape, mainly due to issues related to the cathode morphology. These types of batteries commonly use an aqueous electrolyte, which is susceptible to changes in air temperature and humidity that can cause leakage and block the air-cathode. This problem entails the use of bulky systems that require an empty gap between the porous cathode and the electrolyte to avoid flooding. This paper presents a novel fabrication method and morphology for a conductive and flexible doublemembrane nanocomposite air-cathode. The pore morphology for each membrane was designed for two purposes using two different foaming techniques. The foaming technique includes supercritical CO 2 in a high-pressure chamber to create a hydrophobic closed-cell structure. On the other hand, NaCl was used as a temporary space-holder to create a hydrophilic open-cell morphology. The closed-cell membrane presented an optimal performance as a hydrophobic oxygen diffusion layer whereas the hydrophilic open-cell membrane, apart from increasing the catalytic surface area, also increased the water absorption by 12 times with a swelling capacity of 68%. The electrochemical tests exhibited stable performance without presenting leaking even when bent under a relative humidity of 85-90 %. The specific energy density achieved was as high as 198 W h kg -1 , which is similar to that of some of the available commercial alkaline cells.Furthermore, the double-membrane air-cathode also has the advantages of low cost, high recyclability and the possibility of multiple configurations including flexibility for both primary and secondary configurations.

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Corrosion characterisation of alumina–magnesium metal matrix composites

Cited by 77 publications

References 24 publications

Corrosion behaviour of carbon fibres/magnesium metal matrix composite and electrochemical response of its constituents

Corrosion behaviour of carbon fibres/magnesium metal matrix composite and electrochemical response of its constituents

Corrosion behavior of 3C magnesium alloys in simulated sweat solution

Double-layer membrane cathode with improved oxygen diffusivity in zinc-air batteries

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