Influence of surface chemistry on the formation of crystalline hydroxide coatings on Mg alloys in liquid water and steam systems

Chong Ke, Yajie Wu, Yao Qiu, Junhao Duan, Nick Birbilis, Xiao-Bo Chen

Research output: Contribution to journalArticleResearchpeer-review

34 Citations (Scopus)

Abstract

An environmentally-friendly ‘steam-coating’ treatment was employed to prepare protective coatings on magnesium (Mg) and its alloys against corrosion. This involved a hydrothermal surface treatment performed in water vapour using a closed stainless steel autoclave at 150 °C for 3 h. The correlation between coating functionality and alloy chemistry, including the concentration of alloying elements of aluminium, zinc and rare earth, was studied. It was determined that Al played a significant role in the formation of a protective Mg(OH)2 coating, whilst Zn and RE elements were not a key contributor to protective development.

Original languageEnglish
Pages (from-to)145-159
Number of pages15
JournalCorrosion Science
Volume113
DOIs
Publication statusPublished - 1 Dec 2016

Keywords

  • A. Magnesium
  • A. Rare earth elements
  • B. Polarisation
  • B. SEM
  • C. Interfaces
  • C. Passive film

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