Fabrication of anodic porous alumina via anodizing in cyclic oxocarbon acids

Tatsuya Kikuchi, Daiki Nakajima, Jun Kawashima, Shungo Natsui, Ryosuke O. Suzuki

Research output: Contribution to journalArticlepeer-review

40 Citations (Scopus)

Abstract

The growth behavior of anodic porous alumina formed by anodizing in novel electrolyte solutions, the cyclic oxocarbon acids croconic and rhodizonic acid, was investigated for the first time. High-purity aluminum specimens were anodized in 0.1 M croconic and rhodizonic acid solutions at various constant current densities. An anodic porous alumina film with a cell size of 200-450 nm grew uniformly on an aluminum substrate by rhodizonic acid anodizing at 5-40 A m -2 , and a black, burned oxide was formed at higher current density. The cell size of the porous alumina increased with current density and Corresponding anodizing voltage. Anodizing in croconic acid at 293 K caused the formation of thin anodic porous alumina films as well as black, thick burned oxides. The uniformity of the porous alumina improved by increasing the temperature of the croconic acid solution, and anodic porous alumina films with a uniform film thickness were successfully obtained. Our experimental results showed that the cyclic oxocarbon acids croconic and rhodizonic acid could be employed as a suitable electrolyte for the formation of anodic porous alumina films.

Original languageEnglish
Pages (from-to)276-285
Number of pages10
JournalApplied Surface Science
Volume313
DOIs
Publication statusPublished - 2014 Sep 15
Externally publishedYes

Keywords

  • Aluminum
  • Anodic porous alumina
  • Anodizing
  • Croconic acid
  • Rhodizonic acid

ASJC Scopus subject areas

  • Chemistry(all)
  • Condensed Matter Physics
  • Physics and Astronomy(all)
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films

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