Controlling the thickness of electrochemically produced porous alumina membranes: the role of the current density during the anodization

Christoulaki, Anastasia; Dellis, Spilios; Spiliopoulos, Nikolaos; Anastassopoulos, D.L.; Vradis, Alexandros A.

doi:10.1007/s10800-014-0680-4

Cited by 15 publications

(10 citation statements)

References 37 publications

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“…The lowest growth rate has been observed in a phosphoric acid electrolyte. [30][31][32] In this study, coating thickness is a function of anodisation duration at second step and thickness of anodic alumina coating was measured by thickness metre Dual Scope MP40 and eddy current method. The measurements were performed in 10 different points on the anodised surface and an average value was reported in Table 3.…”

Section: Contact Anglementioning

confidence: 99%

Porous anodic alumina coating for optimisation of pool-boiling performance

Nazari

Saedodin

2017

Surface Engineering

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Studies on boiling show that this phenomenon is strongly influenced by geometry and chemistry of surface. One of the methods to control boiling and achieve optimum conditions for increasing the heat transfer coefficient (HTC) is to change the chemistry and structure of the surface by using coating. In this research, one of the techniques of electrochemical coating, that is called anodising, is used for coating aluminium oxide layer on the surface of aluminium samples. With pool-boiling test on anodised samples using deionised water and measuring HTC and critical heat flux (CHF), it can be concluded that porous anodic alumina coating can increase HTC and CHF of nucleate pool boiling, due to change wettability and geometrical structure of surface.

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Section: Contact Anglementioning

confidence: 99%

Porous anodic alumina coating for optimisation of pool-boiling performance

Nazari

Saedodin

2017

Surface Engineering

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“…The geometrical characteristics of PAM can be easily controlled during their synthesis process. PAMs with pore diameter between 10 and 250 nm and interpore distance between 25 and 500 nm can be easily synthesized, while the thickness of PAMs can be several hundreds of micrometers [2].…”

Section: Solid State Physics and Poly-mer Physics Research Labora-torymentioning

confidence: 99%

Solar Energy Materials and Systems for an Aesthetic and Sustainable Future

Tripanagnostopoulos

Leftheriotis

Vradis

et al. 2014

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Renewable energy sources have an important role in global energy demand in the 21st century. New investigations in solar energy materials and solar energy systems offer new opportunities for a sustainable future, adapting local energy needs, environmental protection and aesthetics. Solar energy can be used almost everywhere, with visible materials and systems. In this paper, an overview of new solar energy materials and systems is presented, focused on the work that is performed in the Laboratories of the University of Patras and of the Technical Educational Institute. The research activities of these Laboratories are on nanotechnology, biotechnology, microalgae hydrogen production, photovoltaics, smart glazings and materials for solar energy systems. A brief description of the achieved improvements on these solar energy materials is included, where energy performance and system cost play an important role together with aesthetics, considering their wide application in the future.

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“…Much work have been done to explore the mechanism [15,16] of anodization. Besides, the influence of anodization parameters (such as potential [17,18], current density [19], electrolyte temperature, and anodization time [20]) on the microstructure and properties of PAA coatings has been also intensively studied. Studies found that during the anodization process, the growth and dissolution of aluminum oxide happened simultaneously and competed with each other.…”

Section: Introductionmentioning

confidence: 99%

Effect of Negative Current on the Microstructure of Oxide Coatings Prepared by Hybrid Pulse Anodization

Huang

Jiang

Liu

et al. 2018

Metals

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The oxide coatings were prepared on 6061 Al alloy at different negative current densities in oxalic acid using the hybrid pulse anodization (HPA) method at room temperature. The variation curves of positive and negative voltages with anodization time were recorded. The nanopore diameters and distribution regularities in HPA coatings were analyzed with the Image-Pro Plus software based on field-emission scanning electron microscope (FE-SEM) images. The results showed that the negative current could reduce the growth rate of HPA coatings, and thus led to a small thickness of the coatings within the same anodization time. Besides, appropriate negative current densities resulted in the better distribution uniformity of nanopores, but the excessive negative current densities tended to cause inferior nanopore arrangement. These were attributed to the existence of the negative current, causing H+ and O2− to move in opposite directions, so that a large number of H+ concentrated on the surface of the HPA coatings, resulting in the accelerated dissolution of the coatings.

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Controlling the thickness of electrochemically produced porous alumina membranes: the role of the current density during the anodization

Cited by 15 publications

References 37 publications

Porous anodic alumina coating for optimisation of pool-boiling performance

Porous anodic alumina coating for optimisation of pool-boiling performance

Solar Energy Materials and Systems for an Aesthetic and Sustainable Future

Effect of Negative Current on the Microstructure of Oxide Coatings Prepared by Hybrid Pulse Anodization

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