Introducton to The Corrosion of Aluminium

Vargel, Christian

doi:10.1016/b978-008044495-6/50011-2

Cited by 99 publications

(86 citation statements)

References 11 publications

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“…In contrast, there were no notable changes in the structural morphology of the Al substrate after discharging in phosphate buffer, indicating that the thin Al 2 O 3 film on the Al substrate without ZnO modifier provides corrosion protection of the Al surface by preventing oxygen and anion transport to the metal surface, which is consistent with the literature reports [19,20,36]. Thereby, the ZnO modifier aides in the corrosion of metallic Al to generate Al(OH) 3 film and hydrogen gas on the surface of the Al anode in phosphate electrolyte.…”

Section: Effect Of Zno Modifiersupporting

confidence: 92%

“…The investigation of the activation of Al in physiological saline buffer is an attractive area in energy conversion applications in order to further improve the performance of electrochemical power sources for ultra-low power implantable bioelectronic devices. Although Al is highly reactive, it is protected by a surface layer of inert transparent Al 2 O 3 film (3e6 nm thick) that forms immediately upon exposure to air and/or water, thereby providing excellent corrosion resistance [19,20]. However, Al will react with aqueous alkaline and acidic solutions to generate hydrogen [21e27] and various anions such as, Cl-and gluconate anions have been shown to induce pitting corrosion of Al in water [25e29].…”

Section: Introductionmentioning

confidence: 99%

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Energy conversion from aluminium and phosphate rich solution via ZnO activation of aluminium

Slaughter

Sunday

Stevens

2015

Materials Chemistry and Physics

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h i g h l i g h t s g r a p h i c a l a b s t r a c t ZnO activation of metallic Al for generating electricity for bioelectronic applications. Selective electrocatalysis in phosphate rich electrolyte. A cell operating in physiological saline buffer produces an open-circuit voltage of 0.751 V. A maximum power density of 1.77 mW cm À2 was obtained.a b s t r a c t Electrochemical power sources have motivated intense research efforts in the development of alternative 'green' power sources for ultra-low powered bioelectronic devices. Biofuel cells employ immobilized enzymes to convert the available chemical energy of organic fuels directly into electricity. However, biofuel cells are limited by short lifetime due to enzyme inactivation and frequent need to incorporate mediators to shuttle electrons to the final electron acceptor. In this context, other electrochemical power sources are necessary in energy conversion and storage device applications. Here we report on the fabrication and characterization of a membrane-free aluminium/phosphate cell based on the activation of aluminium (Al) using ZnO nanocrystal in an Al/phosphate cell as a 'green' alternative to the traditional enzymatic biofuel cells. The hybrid cell operates in neutral phosphate buffer solution and physiological saline buffer. The ZnO modifier in the phosphate rich electrolyte activated the pitting of Al resulting in the production of hydrogen, as the reducing agent for the reduction of H 2 PO 4 À ions to HPO 3 2À ions at a formal potential of À0.250 V vs. Ag/AgCl. Specifically, the fabricated cell operating in phosphate buffer and physiological saline buffer exhibit an open-circuit voltage of 0.810 V and 0.751 V and delivered a maximum power density of 0.225 mW cm À2 and 1.77 mW cm À2 , respectively. Our results demonstrate the feasibility of generating electricity by activating Al as anodic material in a hybrid cell supplied with phosphate rich electrolyte. Our approach simplifies the construction and operation of the electrochemical power source as a novel "green" alternative to the current anodic substrates used in enzymatic biofuel cells for low power bioelectronics applications.

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Section: Effect Of Zno Modifiersupporting

confidence: 92%

Section: Introductionmentioning

confidence: 99%

Energy conversion from aluminium and phosphate rich solution via ZnO activation of aluminium

Slaughter

Sunday

Stevens

2015

Materials Chemistry and Physics

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“…As for aluminium, on a freshly prepared surface and in unpolluted air, the critical threshold of relative humidity is about 70% [19]. The northern Taklamakan Desert atmosphere is characterized by its very higher annual average evaporation (2800.0 mm), and lower annual average precipitation (48.9 mm) and RH (47%).…”

Section: Discussionmentioning

confidence: 99%

Atmospheric corrosion of aluminium in the northern Taklamakan Desert environment

Sun

Zheng

Wen

et al. 2009

Materials & Corrosion

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Atmospheric corrosion of aluminium in the northern Taklamakan Desert environment in China was investigated through the field exposure over a period of 2 years and the laboratory-accelerated test of dry-wet cycles. The results demonstrated that aluminium 1050 suffered serious atmospheric corrosion in the field exposure, which resulted from high soluble salt content and a high pH value of surface desert soil deposited on the samples. The soluble salt in surface desert soil could sufficiently decrease the relative humidity at which corrosion current density suddenly increased. Moreover, aluminium suffered more serious corrosion when there was more soluble salt content in surface desert soil. Among those salts, magnesium chloride caused the most serious corrosion attack.

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“…The intermetallic particles exhibit cathodic activity relative to the aluminum matrix. [1][2][3][4] Therefore, they are catalytic sites for the cathodic reactions and nucleation of pits. [5][6][7] AA1050 has been used in conventional engineering applications, i.e., architectural, automotive industries, containers, and equipment for the food and chemical industries, where corrosion resistance is required and the mechanical strength is relatively unimportant.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical investigation of the epoxy nanocomposites containing MnAl2O4 and CoAl2O4 nanopigments applied on the aluminum alloy 1050

et al. 2015

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The MnAl 2 O 4 and CoAl 2 O 4 nanopigments were synthesized through solution combustion method. The nanopigments extracts in the 3.5 wt% NaCl solution were prepared. Electrochemical impedance spectroscopy (EIS) and linear polarization (LP) techniques were utilized to investigate the corrosion inhibition properties of the pigments in the solutions containing pigments extracts. The epoxy nanocomposites were prepared and applied on the aluminum specimens. EIS and pull-off measurements were performed to characterize the corrosion protection properties of the epoxy nanocomposites. It was revealed that the MnAl 2 O 4 pigment showed higher corrosion inhibition properties than CoAl 2 O 4 in the solution phase. In addition, MnAl 2 O 4 enhanced the corrosion resistance and decreased the adhesion loss of the epoxy coating on the aluminum substrate significantly. The MnAl 2 O 4 nanopigment improved the corrosion resistance of the epoxy coating through increasing the barrier performance and releasing inhibitive species.

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Introducton to The Corrosion of Aluminium

Cited by 99 publications

References 11 publications

Energy conversion from aluminium and phosphate rich solution via ZnO activation of aluminium

Energy conversion from aluminium and phosphate rich solution via ZnO activation of aluminium

Atmospheric corrosion of aluminium in the northern Taklamakan Desert environment

Electrochemical investigation of the epoxy nanocomposites containing MnAl2O4 and CoAl2O4 nanopigments applied on the aluminum alloy 1050

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