MATERIALS TRANSACTIONS
Online ISSN : 1347-5320
Print ISSN : 1345-9678
ISSN-L : 1345-9678
Electrochemical Properties of Porous Pd-Based Bulk Metallic Glasses
Fengxiang QinGuoqiang XieTakeshi WadaShengli ZhuZhenhua Dan
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2013 Volume 54 Issue 8 Pages 1347-1350

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Abstract

The corrosion behavior of porous Pd42.5Cu30Ni7.5P20 bulk metallic glasses with various porosities in Hanks’ solution was investigated. The results revealed that all bulk metallic glasses exhibited similar corrosion behavior. The bulk metallic glasses with the porosity of 0 and 18% were spontaneously passivated with passive current densities between 10−2 and 10−1 A/m2 in anodic polarization curves. The bulk metallic glasses with 40 and 55% porosity exhibited an anodic process with the current density increasing gradually. As the anodic potential increasing, no obvious passivity breakdown occurred in the anodic polarization process. The polarization resistance decreased with the increasing of the porosity from 0 to 55%. The breakdown potential of the passive film for the bulk metallic glass with 55% porosity was about 100 mV lower than that of the 0% porosity Pd42.5Cu30Ni7.5P20 bulk metallic glass.

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© 2013 The Japan Institute of Metals and Materials
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