Effect of heat treatment on the corrosion behaviour of amorphous Mg-18 at% Ni alloy

M. S. Ong; Y. Li; D. J. Blackwood; S. C. Ng; C. H. Kam

doi:10.1016/S0925-8388(98)00679-3

Effect of heat treatment on the corrosion behaviour of amorphous Mg-18 at% Ni alloy

M. S. Ong
, Y. Li^*
, D. J. Blackwood
, S. C. Ng
, C. H. Kam

^*Corresponding author for this work

National University of Singapore

Research output: Contribution to journal › Article › peer-review

16 Scopus citations

Abstract

The effect of heat treatment on the corrosion resistance of rapidly solidified amorphous Mg₈₂Ni₁₈ ribbons has been studied by hydrogen evolution testing in 3% NaCl solution and potentiodynamic scanning in 0.01 M NaCl solution. The results show that the dissolution rate for the partially crystallised sample obtained after 4 min heat treatment at 160°, was lower in comparison to the fully crystalline or fully amorphous samples. Comparison of the polarisation responses of the samples showed that, for the partially crystallised samples, passivation current density was lower than that of the fully amorphous sample, although passivation behaviour was weaker. With prolonged heat treatment duration, fully crystallised samples exhibited a marked deterioration of corrosion resistance. The corrosion results were discussed and correlated with the progress of crystallisation processes by means of XRD, DSC, TEM and SEM.

Original language	English
Pages (from-to)	252-258
Number of pages	7
Journal	Journal of Alloys and Compounds
Volume	279
Issue number	2
DOIs	https://doi.org/10.1016/S0925-8388(98)00679-3
State	Published - 2 Oct 1998
Externally published	Yes

Keywords

Amorphous
Electrochemical
Heat treatment
Hydrogen Evolution Testing
Mg-Ni alloy

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10.1016/S0925-8388(98)00679-3

Cite this

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title = "Effect of heat treatment on the corrosion behaviour of amorphous Mg-18 at\% Ni alloy",

abstract = "The effect of heat treatment on the corrosion resistance of rapidly solidified amorphous Mg82Ni18 ribbons has been studied by hydrogen evolution testing in 3\% NaCl solution and potentiodynamic scanning in 0.01 M NaCl solution. The results show that the dissolution rate for the partially crystallised sample obtained after 4 min heat treatment at 160°, was lower in comparison to the fully crystalline or fully amorphous samples. Comparison of the polarisation responses of the samples showed that, for the partially crystallised samples, passivation current density was lower than that of the fully amorphous sample, although passivation behaviour was weaker. With prolonged heat treatment duration, fully crystallised samples exhibited a marked deterioration of corrosion resistance. The corrosion results were discussed and correlated with the progress of crystallisation processes by means of XRD, DSC, TEM and SEM.",

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year = "1998",

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doi = "10.1016/S0925-8388(98)00679-3",

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TY - JOUR

T1 - Effect of heat treatment on the corrosion behaviour of amorphous Mg-18 at% Ni alloy

AU - Ong, M. S.

AU - Li, Y.

AU - Blackwood, D. J.

AU - Ng, S. C.

AU - Kam, C. H.

PY - 1998/10/2

Y1 - 1998/10/2

N2 - The effect of heat treatment on the corrosion resistance of rapidly solidified amorphous Mg82Ni18 ribbons has been studied by hydrogen evolution testing in 3% NaCl solution and potentiodynamic scanning in 0.01 M NaCl solution. The results show that the dissolution rate for the partially crystallised sample obtained after 4 min heat treatment at 160°, was lower in comparison to the fully crystalline or fully amorphous samples. Comparison of the polarisation responses of the samples showed that, for the partially crystallised samples, passivation current density was lower than that of the fully amorphous sample, although passivation behaviour was weaker. With prolonged heat treatment duration, fully crystallised samples exhibited a marked deterioration of corrosion resistance. The corrosion results were discussed and correlated with the progress of crystallisation processes by means of XRD, DSC, TEM and SEM.

AB - The effect of heat treatment on the corrosion resistance of rapidly solidified amorphous Mg82Ni18 ribbons has been studied by hydrogen evolution testing in 3% NaCl solution and potentiodynamic scanning in 0.01 M NaCl solution. The results show that the dissolution rate for the partially crystallised sample obtained after 4 min heat treatment at 160°, was lower in comparison to the fully crystalline or fully amorphous samples. Comparison of the polarisation responses of the samples showed that, for the partially crystallised samples, passivation current density was lower than that of the fully amorphous sample, although passivation behaviour was weaker. With prolonged heat treatment duration, fully crystallised samples exhibited a marked deterioration of corrosion resistance. The corrosion results were discussed and correlated with the progress of crystallisation processes by means of XRD, DSC, TEM and SEM.

KW - Amorphous

KW - Electrochemical

KW - Heat treatment

KW - Hydrogen Evolution Testing

KW - Mg-Ni alloy

UR - https://www.scopus.com/pages/publications/0032475608

U2 - 10.1016/S0925-8388(98)00679-3

DO - 10.1016/S0925-8388(98)00679-3

M3 - 文章

AN - SCOPUS:0032475608

SN - 0925-8388

VL - 279

SP - 252

EP - 258

JO - Journal of Alloys and Compounds

JF - Journal of Alloys and Compounds

IS - 2

ER -

Effect of heat treatment on the corrosion behaviour of amorphous Mg-18 at% Ni alloy

Abstract

Keywords

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