ELECTROCHEMICAL IMPEDANCE SPECTROSCOPY OF TWO DIFFERENT AGED STATUS OF A NEW TYPE Al-Cu-Li ALLOY TREATED BY DIFFERENT AGING PROCESSES

LI Hong-ying; ZENG Zai-de

Corrosion & Protection > 2007 > 28(11): 549-552.

LI Hong-ying, ZENG Zai-de. ELECTROCHEMICAL IMPEDANCE SPECTROSCOPY OF TWO DIFFERENT AGED STATUS OF A NEW TYPE Al-Cu-Li ALLOY TREATED BY DIFFERENT AGING PROCESSES[J]. Corrosion & Protection, 2007, 28(11): 549-552.

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ELECTROCHEMICAL IMPEDANCE SPECTROSCOPY OF TWO DIFFERENT AGED STATUS OF A NEW TYPE Al-Cu-Li ALLOY TREATED BY DIFFERENT AGING PROCESSES

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Received Date: January 29, 2007

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Electrochemical impedance spectroscopy (EIS) and the corrosion behavior of a new type Al-Cu-Li alloy in T6 aged and T8 aged status during corrosion process were studied.The corrosion resistance of T8-treated samples was better than that of T6-treated ones because of the deformation before aging.The difference of the two type samples in corrosion behavior was analyzed by microstructure observation,including grain boundary and sub-boundary,precipitates in matrix of samples before corrosion.Due to the deformation,precipitate T1 phase in T8-treated samples was smaller than that in T6-treated ones,which leaded to smaller stress caused by corrosion products in T8-treated samples.Thus,corrosion resistance of T8-treated samples was better than that of T6-treated ones.
- EIS,
- Al-Cu-Li alloy,
- Corrosion,
- Microstructure

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ELECTROCHEMICAL IMPEDANCE SPECTROSCOPY OF TWO DIFFERENT AGED STATUS OF A NEW TYPE Al-Cu-Li ALLOY TREATED BY DIFFERENT AGING PROCESSES

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