The role of β(Al12Mg17) phase on corrosion behavior of the AZ91 alloy in NaCl aqueous solution

The role of β(Al12Mg17) phase on corrosion behavior of the AZ91 alloy in NaCl aqueous solution

The effect of the β phase (Al Mg ) on the corrosion resistance in a NaCl solution was investigated by electro chemical methods.Volume fraction of β phase in each specimen was controlled systematically by isothermal annealing at 473 K as 0%, 4%, 22% and 100 %, respectively. Although α phase shows low...

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Bibliographic Details
Published in:Archives of metallurgy and materials Vol. 62; no. 1; pp. 155 - 158
Main Authors: Hatakeyama, M., Shimono, K., Iwashima, D., Saikawa, S., Sunada, S.
Format: Journal Article
Language:English
Published: Warsaw De Gruyter Open 01-03-2017
Polish Academy of Sciences
Subjects:
Alloys
Aluminum
Beta phase
Concentration (composition)
Corrosion
Corrosion currents
Corrosion effects
Corrosion resistant alloys
Current density
Isothermal annealing
light alloy
Magnesium
Sodium chloride
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Summary:The effect of the β phase (Al Mg ) on the corrosion resistance in a NaCl solution was investigated by electro chemical methods.Volume fraction of β phase in each specimen was controlled systematically by isothermal annealing at 473 K as 0%, 4%, 22% and 100 %, respectively. Although α phase shows lower corrosion current density than that of β phase, the α/β mixed phase specimen showed higher corrosion current density than that of α phase.It strongly suggests that β phase act as cathodic electrode in the alloys.
ISSN:2300-1909
1733-3490
2300-1909
DOI:10.1515/amm-2017-0021