Effects of Er addition and cooling rate on the corrosion resistance of Zn-5Al alloys. Issue 8 (24th May 2023)

• Record Type: Journal Article
• Authors: Ge, Zhen; Huang, Chengcong; Qi, Liang; Tang, Liang; You, Shengyi
• Is Part Of: Materials science and technology. Volume 39:Issue 8(2023)
• Page Start: 1030
• Page End: 1038
• Publication Date: 2023-05-24
• Subjects: Zn-5Al alloy -- Er -- microstructure -- corrosion resistance; Materials science -- Periodicals; Microstructure -- Periodicals; Metallurgy -- Periodicals; 620.1105
• DOI: 10.1080/02670836.2022.2157529
• Languages: English
• ISSNs: 0267-0836

Abstract

Abstract : 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.