Effects of Er addition and cooling rate on the corrosion resistance of Zn-5Al alloys

Effects of Er addition and cooling rate on the corrosion resistance of Zn-5Al alloys

Galfan (Zn-5Al-RE) coating is widely used in high-strength steel wires. The effects of cooling rate and the adulteration of erbium (Er) on the microstructure and corrosion resistance of Zn-5Al alloys were investigated in this study. The results show that the Zn-5Al alloy is made up of the primary η-...

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Veröffentlicht in:Materials science and technology 2023-05, Vol.39 (8), p.1030-1038
Hauptverfasser: Ge, Zhen, Huang, Chengcong, Qi, Liang, Tang, Liang, You, Shengyi
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Sprache:eng
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corrosion resistance
microstructure
Zn-5Al alloy
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container_issue 8
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container_title Materials science and technology
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creator Ge, Zhen
Huang, Chengcong
Qi, Liang
Tang, Liang
You, Shengyi
description Galfan (Zn-5Al-RE) coating is widely used in high-strength steel wires. The effects of cooling rate and the adulteration of erbium (Er) on the microstructure and corrosion resistance of Zn-5Al alloys were investigated in this study. The results show that the Zn-5Al alloy is made up of the primary η-Zn phase and eutectic structure at a high cooling rate. As the cooling rate decreases, the corrosion current firstly increased and then decreased due to decrease of the primary η-Zn content , the appearance and grew of α-Al phase. Moreover, the addition of Er leads to the formation of Er-containing intermetallic compounds in the Zn-5Al alloy, reducing the size of the primary η-Zn and α-Al phase, decreasing the corrosion current density, and improving the density and compactness of the corrosion product.
doi_str_mv 10.1080/02670836.2022.2157529
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The effects of cooling rate and the adulteration of erbium (Er) on the microstructure and corrosion resistance of Zn-5Al alloys were investigated in this study. The results show that the Zn-5Al alloy is made up of the primary η-Zn phase and eutectic structure at a high cooling rate. As the cooling rate decreases, the corrosion current firstly increased and then decreased due to decrease of the primary η-Zn content , the appearance and grew of α-Al phase. 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Zn-5Al alloy
title Effects of Er addition and cooling rate on the corrosion resistance of Zn-5Al alloys
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