Achieving an acid resistant surface on magnesium alloy via bio-inspired design

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalNot applicablepeer-review

2 Scopus Citations
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Author(s)

  • Xuming Zhang
  • Shu Xiao
  • Zhongzhen Wu
  • Guosong Wu
  • Kejian Ding

Detail(s)

Original languageEnglish
Pages (from-to)150-161
Journal / PublicationApplied Surface Science
Volume478
Early online date22 Jan 2019
Publication statusPublished - 1 Jun 2019

Abstract

Developing acid-resistant magnesium alloys is challenging because of the high chemical reactivity of magnesium in acidic media. In this work, a bio-inspired strategy by taking advantage of the super-hydrophobic effects on lotus leaves is described. The self-layered coating consisting of an inner compact layer and outer Mg-Al layered double hydroxide (LDH) microsheet-based layer prepared hydrothermally exhibits enhanced corrosion resistance in saline solutions but cannot resist corrosion in sulfuric acid. After depositing a fluorocarbon polymer film on the microsheets using a polytetrafluoroethylene (PTFE) target by magnetron sputtering, a super-hydrophobic surface is created on the magnesium alloy. Compared to the surface modified hydrothermally, the super-hydrophobic surface provides better corrosion protection in H2SO4 due to trapped air pockets in the microsheet array. The dual process offers a promising means to mitigate corrosion of magnesium alloys in acidic media.

Research Area(s)

  • Corrosion resistance, Hydrothermal treatment, Magnesium alloy, Magnetron sputtering, Super-hydrophobic surface

Citation Format(s)