Effect of Fe and Ce Content on Mechanical Properties and Corrosion Resistance of Galfan Alloy
WU Changjun1, LU Longfei1, YANG Wei1, SU Xuping1,2, WANG Jianhua1
1 Jiangsu Key Laboratory of Materials Surface Science and Technology, School of Materials Science and Engineering, Changzhou University, Changzhou 213164; 2 Jiangsu Collaborative Innovation Center of Photovolatic Science and Engineering, Changzhou University, Changzhou 213164
Abstract: The Zn-5Al-0.1Ce-xFe and Zn-5Al-yCe-0.1Fe alloys were prepared by adding Zn-Fe-Ce master alloys, which were melted in evacuated condition, into the Zn-Al bath. The influence of Fe and Ce contents on the microstructure and mechanical pro-perties of these alloys were investigated. And their electrochemical properties were measured by the electrochemical workstation. Experimental results indicate that FeAl3Znx particles form in the Zn-5Al-0.1Ce alloy when Fe content is above 0.02%. With the increase of the Fe content, the amounts of the FeAl3Znx phase and the proeutectic η-Zn phase increase, which make the microstructure of the Zn-Al eutectic change from lamellar to dot. Less than 0.1% Fe will improve the tensile strength of the Galfan alloy. With the increase of Fe content, the tensile strength of the alloy decreases slightly. The best comprehensive mechanical properties is obtained when 0.02%Fe is added in the alloy. And the corrosion resistance of the alloys increase when less than 0.04%Fe is added in to the Zn-5Al-0.1Ce alloy. Moreover, with the increase of Ce content, the mechanical properties of the Zn-5Al-yCe-0.1Fe alloys reduce, while its corrosion resistance changed slightly. Therefore, it is believed that the content of Fe and Ce in the liquid bath should be strictly controlled according to the requirement of the performance during in production process.
1 He Z R, He Y, Liu J T, et al. Effects of Al and RE on microstructure and corrosion resistance of Zn-Al alloy coatings [J]. Chinese J Nonferrous Met,2014(8):2020(in Chinese). 贺志荣, 何应, 刘继拓,等. Al和RE对Zn-Al合金镀层组织和耐蚀性的影响 [J]. 中国有色金属学报,2014(8):2020. 2 Souto R M, Scantlebury D J. Cathodic delamination of coil coatings produced with different Zn-based intermediate metallic layers [J]. Prog Organ Coat,2005,53(1):63. 3 Li Y D. Zn-5Al-RE alloy and its application [J]. Corros Protect,1996,17(3):132(in Chinese). 李定云. Zn-5Al-RE 合金及其应用 [J]. 腐蚀与防护,1996,17(3):132. 4 Ghuman A R P, Goldstein J I. Reaction mechanisms for the coatings formed during the hot dipping of iron in 0 to 10 pct Al-Zn baths at 450 to 700 ℃ [J]. Metall Trans,1971,2(10):2903. 5 Chen Z W, Gregory J T, Sharp R M. Intermetallic phases formed during hot dipping of low carbon steel in a Zn-5 pct Al melt at 450 ℃ [J]. Metall Trans A,1992,23(9):2393. 6 Z·elechower M, Kli J, Augustyn E, et al. The microstructure of annealed Galfan coating on steel substrate [J]. Archives Metall Mater,2012,57(2):517. 7 Gao Q Z, Feng B, Du A, et al. Research progress of formation mechanism of hot-dip Zn-5%Al-RE galfan alloy layer [J]. Hot Work Technol,2008,37(6):89(in Chinese). 高秋志, 冯彬, 杜安, 等. 热浸镀 Zn-5% Al-RE 合金层形成机理的研究进展 [J]. 热加工工艺,2008,37(6):89. 8 Du A, Cao X M, Ma R N,et al. Research on the cracking of hot-dip galfan coating of steel wire [J]. Mater Rev:Res,2010,24(4):63(in Chinese). 杜安, 曹晓明, 马瑞娜,等. 钢丝热浸镀 Galfan 合金镀层开裂的研究 [J]. 材料导报:研究篇,2010,24(4):63. 9 Rosalbino F, Angelini E, Macciò D,et al. Influence of rare earths addition on the corrosion behaviour of Zn-5% Al (Galfan) alloy in neutral aerated sodium sulphate solution [J]. Electrochim Acta,2007,52(24):7107. 10 Yang T Z, Wu C J, Wang J H, et al. Solidification microstructure and corrosion resistance of galfan alloy with different cooling conditions and Ce content [J]. Chin J Rare Metals,2015(7):583(in Chinese). 杨廷志, 吴长军, 王建华, 等. 冷却条件和 Ce 含量对 Galfan 合金凝固组织及其耐蚀性的影响 [J]. 稀有金属,2015(7):583. 11 Rosalbino F, Angelini E, Macciò D, et al. Application of EIS to assess the effect of rare earths small addition on the corrosion beha-viour of Zn-5% Al (Galfan) alloy in neutral aerated sodium chloride solution [J]. Electrochim Acta,2009,54(4):1204. 12 Wang K L, Zhang Q B, Sun M L, et al. Microstructure and corrosion resistance of laser clad coatings with rare earth elements [J]. Corros Sci,2001,43(2):255. 13 Tang Naiyong, Su Xuping. On the ternary phase in the zinc-rich corner of the Zn-Fe-Al system at temperatures below 450 ℃ [J]. Me-tall Mater Trans A,2002,33:1559. 14 Dou Y H, Liu Y, Xu F, et al. Effect of Fe on microstructure and mechanical properties of ZA27 alloy [J]. Mater Sci Eng Powder Metall,2012,17(3):309(in Chinese). 窦玉海, 刘咏, 徐菲, 等. Fe 元素对 ZA27 合金显微组织和力学性能的影响 [J]. 粉末冶金材料科学与工程,2012,17(3):309. 15 Guo T X, Dong X Q, Deng S H, et al. Influence of rare earth on hot-dipped 55% Al-Zn alloy coating [J]. Adv Mater Res,2013,774:1132.
渝公网安备50019002502923号 版权所有：《材料导报》编辑部
2017, Vol. 31 
