A new method to improve the corrosion resistance of titanium for hydrometallurgical applications

Jing Liu, Akram Alfantazi, Edouard Asselin

Research output: Contribution to journalArticlepeer-review

27 Scopus citations

Abstract

The main objective of the present work was to develop a method to fabricate titanium oxide films with high corrosion resistance by controlled chemical oxidation with H 2 O 2 solutions at 90 °C. The prepared chemically oxidized films (COFs) were characterized by X-ray diffraction (XRD) measurements and found to be a mixture of anatase and rutile or pure rutile, depending mainly on the presence of Cl - and SO 4 2- in H 2 O 2 solutions. XRD results indicated that the addition of SO 4 2- ions promoted the formation of anatase; while the addition of Cl - ions favored the formation of rutile. Linear polarization resistance and electrochemical impedance spectroscopy measurements were used to evaluate the corrosion resistance of the as grown COFs for hydrometallurgical applications. Results verified that chemical oxidation with H 2 O 2 solutions is capable of improving the corrosion resistance of Ti for hydrometallurgical applications. Chemical oxidation with 2 M H 2 O 2 /0.1 M HCl solution led to the best improvement of the corrosion resistance of Ti.

Original languageBritish English
Pages (from-to)480-487
Number of pages8
JournalApplied Surface Science
Volume332
DOIs
StatePublished - 30 Mar 2015

Keywords

  • Chemical oxidation
  • Corrosion resistance
  • Hydrometallurgy
  • Titanium

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