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EFFECT OF AGING ON CORROSION BEHAVIOR OF Al-Cu-Li-Zr ALLOY CONTAINING Sc

LU Cong-ge

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Abstract

Corrosion behavior of an Al-Cu-Li-Zr alloy containing Sc aged at different regimes was investigated.The results show that intergranular corrosion and exfoliation corrosion of Al-Cu-Li-Zr alloy containing Sc were accelerated with increasing the aging temperature for each T6 state or with prolonging the aging time at 160℃,which were in accord with the results of polarization tests in EXCO solution.The T1 phase and PFZ,as the anodes of the alloy,are the key factors,responsible to the corrosion behavior of the alloy.

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What this paper is about

Corrosion behavior of an Al-Cu-Li-Zr alloy containing Sc aged at different regimes was investigated.The results show that intergranular corrosion and exfoliation corrosion of Al-Cu-Li-Zr alloy containing Sc were accelerated with increasing the aging temperature for each T6 state or with prolonging the aging time at 160℃,which were in accord with the results of polarization tests in EXCO solution.The T1 phase and PFZ,as the anodes of the alloy,are the key factors,responsible to the corrosion behavior of the alloy.

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Available abstract

Corrosion behavior of an Al-Cu-Li-Zr alloy containing Sc aged at different regimes was investigated.The results show that intergranular corrosion and exfoliation corrosion of Al-Cu-Li-Zr alloy containing Sc were accelerated with increasing the aging temperature for each T6 state or with prolonging the aging time at 160℃,which were in accord with the results of polarization tests in EXCO solution.The T1 phase and PFZ,as the anodes of the alloy,are the key factors,responsible to the corrosion behavior of the alloy.

Key concepts: Materials science, Alloy, Intergranular corrosion, Corrosion, Metallurgy, 6111 aluminium alloy, Polarization (electrochemistry), Anode

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