Electrochemical corrosion of as-cast and annealed Zr48Cu36Al8Ag8 BMG in 0.1 M NaCl solution

Jing Chie Lin, Mao Chia Huang, Ongki B. Anggriawan, Jason Shian Ching Jang, Moch Agus Choiron

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

1 Scopus citations

Abstract

Electrochemical corrosion of as-cast and annealed zirconium-based bulk metallic glass (BMG) Zr48Cu36Al8Ag8 in 0.1 M NaCl solution was investigated in this work. The as-cast specimen, in complete amorphous form, contained null percent of crystal phase (denoted as 0C); however, the annealed ones contained 11, 25, 50, 75 and 100 % crystal phase (denoted as 11C, 25C, 50C, 75C and 100C, respectively) determined by the annealing duration of 0C specimen at 471 °C. Through monitoring of open circuit potential (OCP), measurements of direct-current polarization resistance (PR), Tafel plot (TP), cyclic anodic potentiodynamic polarization (CAPD), and electrochemical impedance spectroscopy (EIS), we found that the corrosion behavior of the Zr48Cu36Al8Ag8 was determined by the the crystal phase present in the specimens dominated by the annealing durations. The corrosion resistance decreased in the order: 25C > 11C > 0C > 50C > 75C > 100C. This result revealed that the corrosion resistance inclined to be better and reached a maximum with increasing the percentage of the crystal phase from 0 to 25%; however, it decreased with further increasing the crystal phase over 25%. A corrosion mechanism is proposed to rationalize the sequence of corrosion resistance. According to the mechanism, the remained free volume and residual strain energy are responsible for the specimens containing crystal phase less than 25% (i.e., 0C, 11C and 25C); whereas crystal defects such as grain boundaries governed the corrosion of those containing crystal phase more than 25 % (i.e., 50C, 75C and 100C).

Original languageEnglish
Title of host publicationMaterials Science and Nanotechnology II
EditorsShinhoo Kang, Gong Hao, Lu Li
PublisherTrans Tech Publications Ltd
Pages65-69
Number of pages5
ISBN (Print)9783038357100
DOIs
StatePublished - 2016
EventInternational Conference on Materials Science and Nanotechnology, ICMSNT 2016 - Seoul, Korea, Republic of
Duration: 12 May 201614 May 2016

Publication series

NameMaterials Science Forum
Volume863
ISSN (Print)0255-5476
ISSN (Electronic)1662-9752

Conference

ConferenceInternational Conference on Materials Science and Nanotechnology, ICMSNT 2016
Country/TerritoryKorea, Republic of
CitySeoul
Period12/05/1614/05/16

Keywords

  • Annealing
  • Bulk metallic glass (BMG)
  • Corrosion
  • Crystal percentages
  • NaCl solution
  • ZrCuAlAg

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