Effect of anodising electrolyte on performance of AZ31 and AM60 magnesium alloys microarc anodic oxides

A. Da Forno, M. Bestetti, N. Lecis

Research output: Contribution to journalArticle

4 Citations (Scopus)


Various oxide film layers were grown onto AZ31 and AM60 magnesium alloy substrates by microarc anodic oxidation (MAO) in alkaline phosphate solutions with different additives such as silicate, aluminate and tetraborate. Surface morphologies and phase composition of the films were assessed by scanning electron microscopy (SEM) and X-ray diffraction (XRD) respectively. The adhesion strength of the anodic oxides was evaluated by scratch testing. The electrolyte composition affects the surface morphology and the adhesion of the oxides to the alloy substrates. The anodising solution consisting of phosphate, tetraborate and silicate produces a better oxides adhesion compared to those achieved in other electrolytic solutions.

Original languageEnglish
Pages (from-to)336-341
Number of pages6
JournalTransactions of the Institute of Metal Finishing
Issue number6
Publication statusPublished - Nov 2013
Externally publishedYes



  • Anodising electrolyte
  • Magnesium alloys
  • Microarc anodic oxidation
  • Scratch test
  • Spark discharge

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Mechanics of Materials
  • Metals and Alloys
  • Surfaces, Coatings and Films

Cite this