Temperature influence on well-ordered nanopore structures grown by anodization of aluminium in sulphuric acid
By Grzegorz D. Sulka, K. G. Parkoła. 2007
214 citations recorded by the source corpus.
Abstract The nanostructure dimensions and regularity of the hexagonal arrangement of nanopores formed by self-organized anodization of aluminium in a 20 wt.% sulphuric acid was investigated at various cell potentials and temperatures. The quantitative analyses of defects and Fourier transforms (FFT) performed from SEM images showed that regularity of nanopores arrangement can be improved by increasing anodizing potential, independently of the anodizing temperature. The best result in controlled anodization of aluminium can be obtained at 25 V and the temperature of 1 °C. The pore size and interpore distance distribution diagrams constructed for 1000 independent measurements showed that increasing uniformity of pore diameter and interpore distance is directly responsible for improvement of the regularity of hexagonal arrangement of nanopores observed with increasing anodizing potential at temperatures of −8 or 1 °C. At 25 V and independently of the anodizing temperature, the reduced number of generated defects is predominant factor improving regularity of the nanopore arrangement. The temperature influence on the lattice data, porosity of the nanostructure and real current density at the bottom of nanopores have been demonstrated.
Subfields: Biomedical Engineering, Materials Chemistry, Pollution
View Paper: https://www.semanticscholar.org/paper/4f4b3c61e41b4d74ea22f43d641a103e4ec210c1
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Citations in the corpus
- A Review on Anodizing of Aerospace Aluminum Alloys for Corrosion Protection (2020, background): “However, its low porosity [120], detrimental for adhesion, and its greater thickness [123], detrimental for fatigue, make it unsuitable as a CAA alternative as a pre-treatment for aerospace painting and bonding applications.”