Mg和RE元素对热浸镀Zn-Al-Mg合金镀层组织和性能的影响
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摘要
热浸镀制备了6种不同成分的Zn-Al-Mg和Zn-Al-Mg-RE合金镀层,并对镀层的厚度、硬度、表面和截面的组织结构、耐蚀性进行了分析,研究了Mg、RE元素对热浸镀Zn-Al-Mg合金镀层组织和性能的综合影响。结果表明:添加RE后,合金镀层的厚度减小。镀层的厚度随着镁含量的减小而呈现增大。一部分合金镀层的硬度因稀土和镁含量的增大而增大。Mg和RE的添加使镀层组织细化,镀层质量优化。镀层耐蚀性也随着Mg和RE的添加而增强。
Six kinds of Zn-Al-Mg and Zn-Al-Mg-RE alloy coatings with different compositions were prepared by hot dip galvanizing. The thickness,surface and cross-sectional structure,hardness,and corrosion resistance of the coatings were analyzed. The effects of Mg and RE on the microstructure and properties of hot dip Zn-Al-Mg alloy coating were studied. The results show that after adding RE,the thickness of alloy coating decreases. The thickness of the coating increases with the decrease of magnesium content. The hardness of the alloy coating increases with the increase of RE and Mg content. Mg and RE elements make the coating fine and optimize the quality of the coating. The corrosion resistance of the coating is enhanced with the addition of Mg and RE.
Six kinds of Zn-Al-Mg and Zn-Al-Mg-RE alloy coatings with different compositions were prepared by hot dip galvanizing. The thickness,surface and cross-sectional structure,hardness,and corrosion resistance of the coatings were analyzed. The effects of Mg and RE on the microstructure and properties of hot dip Zn-Al-Mg alloy coating were studied. The results show that after adding RE,the thickness of alloy coating decreases. The thickness of the coating increases with the decrease of magnesium content. The hardness of the alloy coating increases with the increase of RE and Mg content. Mg and RE elements make the coating fine and optimize the quality of the coating. The corrosion resistance of the coating is enhanced with the addition of Mg and RE.
引文
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[2]宋进英,杜国强,王跃华,等.热浸镀55%Al-43.4%Zn-1.6%Si合金镀层表面锌花尺寸不均原因及腐蚀特征[J].钢铁钒钛,2016,37(3):151-157.Song Jinying,Du Guoqiang,Wang Yuehua,et al.Study on the inhomogeneous defect and corrosion resistance characteristic of 55%Al-43.4%Zn-1.6%Si alloy coating on the steel substrate[J].Iron Steel Vanadium Titanium,2016,37(3):151-157.
[3]Liu W,Li Q,Li M C.Corrosion behaviour of hot-dip Al-Zn-Si and AlZn-Si-3Mg coatings in Na Cl solution[J].Corrosion Science,2017,121:72-83.
[4]刘金刚.无铵助镀下热浸镀锌镀层形成机理的研究[D].昆明:昆明理工大学,2016.
[5]桂艳,许乔瑜,栾向伟,等.热浸Zn-Al-Mg-Ce合金镀层的耐腐蚀性能[J].电镀与涂饰,2016,35(3):136-140.Gui Yan,Xu Qiaoyu,Luan Xiangwei,et al.Corrosion resistance of hot-dip galvanized Zn-Al-Mg-Ce alloy coating[J].Electroplating and Finishing,2016,35(3):136-140.
[6]郭太雄,刘常升,刘春富.热浸镀铝锌合金镀层钢板表面锌花形成的研究进展[J].材料保护,2016,49(2):50-54.Guo Taixiong,Liu Changsheng,Liu Chunfu.Research progress on formation of zinc sparkle on hot-dipped aluminium-zinc alloy coated steel sheet[J].Material Protection,2016,49(2):50-54.
[7]吴长军,范赛林,苏旭平,等.Zn-Ni-Ti热浸镀层组织及其耐蚀性[J].材料热处理学报,2015,36(9):156-160.Wu Changjiun,Fan Sailin,Su Xuping,et al.Microstructure and corrosion resistance of hot-dipped Zn-Ni-Ti coatings[J].Transaction of Materials and Heat Treatment,2015,36(9):156-160.
[8]刘灿楼,江社明,刘昕,等.热浸镀Zn-Al-Mg-Ni-V合金镀层的组织及耐蚀性[J].材料保护,2015,48(9):56-57.Liu Canlou,Jiang Sheming,Liu Xin,et al.Microstructure and corrosion resistance of hot-dipped Zn-Al-Mg-Ni-V alloy coating[J].Journal of Materials Protection,2015,48(9):56-57.
[9]刘继拓.热浸Zn-Al-Mg和Zn-Al-Mg-Si合金镀层制备及组织性能研究[D].汉中:陕西理工大学,2015.
[10]徐远志.稀土元素对热镀铝锌镀层的影响研究[J].云南冶金,2015,44(2):92-96.Xu Yuanzhi.Study on the effect of rare earth element on hot dip Al-Zn coating[J].Yunnan Metallurgy,2015,44(2):92-96.
[11]Yasuhide M,Kazumi N,Akira T,et al.Excellent corrosion-resistant Zn-Al-Mg-Si alloy hot-dip galvanized steel sheet“Super DYMA”[J].Nippon Steel Technical Report,2003(87):24-26.
[12]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,2014,24(8):2020-2025.He Zhirong,He Ying,Liu Jituo,et al.Effects of Al and RE on microstructure and corrosion resistance of Zn-Al alloy coatings[J].The Chinese Journal of Nonferrous Metals,2014,24(8):2020-2025.
[13]Yu K C,Li J,Liu X,et al.Microstructure of hot-dip galanized ZnAl-Mg alloy coating[J].Journal of Shanghai Jiao Tong University,2012,17(6):663-667.
[14]刘璇.热浸镀Al-Zn-In-Si和Al-Zn-Sn-Si镀层的耐腐蚀性能及微观组织研究[D].沈阳:东北大学,2014.
[15]朱广林.Mg和RE对Zn-23Al-0.3Si镀层的改性研究[D].沈阳:东北大学,2014.
[16]Schuerz S,Luckeneder G H,Fleischanderl M,et al.Chemistry of corrosion products on Zn-Al-Mg alloy coated steel sheet[J].Corrosion Science,2010,52(10):3271-3279.
[17]何应.热浸镀Zn-Al-RE合金镀层的制备和性能研究[D].汉中:陕西理工大学,2014.
[18]杨东.锌-铝-镁-稀土合金镀层的制备及其耐腐蚀性能研究[D].西安:西安建筑科技大学,2014.
[19]Yao C Z,LüH B,Zhu T P,et al.Effect of Mg content on microstructure and corrosion behavior of hot dipped Zn-Al-Mg coatings[J].Journal of Alloys and Compounds,2016,670(15):239-248.
[20]孔纲,王丽平,车淳山.热浸镀Zn-Al-Mg合金镀层的研究与应用[J].材料保护,2014,47(4):45-47.Kong Gang,Wang Liping,Che Chunshan.Research and application of hot-dipped Zn-Al-Mg alloy coating[J].Material Protection,2014,47(4):45-47.