Effect of Zr Addition on the corrosion MG behavior of extruded alloys in NaCl solution

Seok Hoan Jeong, Byung Jin Kim, Hyun Kyu Lim, Won Tae Kim, Do Hyang Kim, Soon Hyeok Jeon

Research output: Contribution to journalArticle

Abstract

The effect of Zr addition on the corrosion behavior of an extruded Mg-10Gd-1Zn alloy (GZ101) in 3.5 mass% NaCl solution was investigated by electrochemical and immersion tests in 3.5% NaCl solution. The addition of 1 mass% Zr to GZ101 (to afford GZ101-1Zr) decreased the fraction of 14H (number of stacking layers and H-Hexahedral structure) and lamellar long period stacking ordered (LPSO) phases across the α-Mg matrix and increased the fraction of the X-phase (Mg12GdZn) formed at grain boundaries. Extruded GZ101-1Zr exhibited a significantly smaller corrosion rate than extruded GZ101 (0.13 vs. 2.11 mm·year−1) due to containing less 14H/lamellar LPSO phases (detri- ¯ mental to corrosion resistance) and featuring a noble {1010} prismatic texture in the extrusion direction.

Original languageEnglish
Pages (from-to)499-502
Number of pages4
JournalMaterials Transactions
Volume59
Issue number3
DOIs
Publication statusPublished - 2018

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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