2/Mg2Zn11）和三元共晶（Zn/Al/Mg2Zn11）組成，而含有RE和Ti元素的合金中出現(xiàn)了新相(Ce1-xLax)Zn11和Al2Ti。電化學(xué)阻抗譜表明，相對(duì)于Zn-2.5Al-3Mg合金，Zn-2.5Al-3Mg-0.1RE-0.2Ti合金的耐蝕性得到了顯著的提高。XPS分析結(jié)果表明，RE元素的添加促進(jìn)腐蝕產(chǎn)物Zn5(CO3)2(OH)6和MgAl2O4的形成，而RE和Ti元素的同時(shí)添加促進(jìn)腐蝕產(chǎn)物 Zn5(CO3)2(OH)6、ZnAl2O4和MgAl2O4的形成，且都抑制了疏松多孔ZnO的生成。Zn5(CO3)2(OH)6、ZnAl2O4和MgAl2O4能夠很好地粘附在試樣表面，提供一層致密的保護(hù)層，從而提高Zn-2.5Al-3Mg合金的耐腐蝕性。"/>

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添加RE和Ti元素對(duì)Zn-2.5Al-3Mg合金微觀結(jié)構(gòu)和耐腐蝕性能的影響
作者:
作者單位:

1.濟(jì)南大學(xué) 材料科學(xué)與工程學(xué)院，山東 濟(jì)南 250022;2.山東省建筑工程質(zhì)量檢驗(yàn)檢測(cè)中心有限公司，山東 濟(jì)南 250031;3.山東省環(huán)科院環(huán)境工程有限公司，山東 濟(jì)南 250013

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中圖分類號(hào):

基金項(xiàng)目:

山東省自然科學(xué)基金 (NO. ZR2021ME191)


Effect of Adding RE and Ti Elements on Microstructure and Corrosion Resistance of Zn-2.5Al-3Mg Alloy
Author:
Affiliation:

1.School of Materials Science and Engineering, University of Jinan, Jinan 250022, China;2.Shandong Quality Inspection and Testing Center of Construction Engineering Co., Ltd, Jinan 250031, China;3.Shandong Huankeyuan Environmental Engineering Co., Ltd, Jinan 250013, China

Fund Project:

Natural Science Foundation of Shandong Province (ZR2021ME191)

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    摘要:

    采用XRD、SEM、TEM和XPS等研究了RE和Ti元素對(duì)Zn-2.5Al-3Mg合金微觀結(jié)構(gòu)和耐蝕性的影響。結(jié)果表明，Zn-2.5Al-3Mg合金的微觀結(jié)構(gòu)由富Zn相、二元共晶（Zn-MgZn2/Mg2Zn11）和三元共晶（Zn/Al/Mg2Zn11）組成，而含有RE和Ti元素的合金中出現(xiàn)了新相(Ce1-xLax)Zn11和Al2Ti。電化學(xué)阻抗譜表明，相對(duì)于Zn-2.5Al-3Mg合金，Zn-2.5Al-3Mg-0.1RE-0.2Ti合金的耐蝕性得到了顯著的提高。XPS分析結(jié)果表明，RE元素的添加促進(jìn)腐蝕產(chǎn)物Zn5(CO3)2(OH)6和MgAl2O4的形成，而RE和Ti元素的同時(shí)添加促進(jìn)腐蝕產(chǎn)物 Zn5(CO3)2(OH)6、ZnAl2O4和MgAl2O4的形成，且都抑制了疏松多孔ZnO的生成。Zn5(CO3)2(OH)6、ZnAl2O4和MgAl2O4能夠很好地粘附在試樣表面，提供一層致密的保護(hù)層，從而提高Zn-2.5Al-3Mg合金的耐腐蝕性。

    Abstract:

    The effect of addition of RE and Ti on the microstructure and corrosion resistance of Zn-2.5Al-3Mg alloy were investigated by XRD, SEM, TEM and XPS. Results reveal that the microstructure of the Zn-2.5Al-3Mg alloy is composed of Zn-rich phase, binary eutectic (Zn-MgZn2/Mg2Zn11) and ternary eutectic (Zn/Al/Mg2Zn11). New phases of (Ce1?xLax)Zn11 and Al2Ti appear with the addition of RE and Ti elements. Electrochemical impedance spectroscopy indicates that the corrosion resistance of Zn-2.5Al-3Mg-0.1RE-0.2Ti alloy can be significantly improved compared to that of Zn-2.5Al-3Mg alloy. XPS analysis results show that the addition of RE element promotes the formation of Zn5(CO3)2(OH)6 and MgAl2O4 in the corrosion products, while the simultaneous addition of RE and Ti elements promotes the formation of corrosion products Zn5(CO3)2(OH)6, ZnAl2O4 and MgAl2O4, and inhibits the formation of loose porous ZnO. Zn5(CO3)2(OH)6, ZnAl2O4 and MgAl2O4 attach well to the surface of the sample, which provides a dense protective layer for the alloys, thus improving the corrosion resistance of Zn-2.5Al-3Mg alloy.

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陳文萱,周國(guó)榮,王學(xué)鋒,馬龍悅,趙德剛,李永生,王棟,秦碧蓮.添加RE和Ti元素對(duì)Zn-2.5Al-3Mg合金微觀結(jié)構(gòu)和耐腐蝕性能的影響[J].稀有金屬材料與工程,2023,52(8):2737~2745.[Chen Wenxuan, Zhou Guorong, Wang Xuefeng, Ma Longyue, Zhao Degang, Li Yongsheng, Wang Dong, Qin Bilian. Effect of Adding RE and Ti Elements on Microstructure and Corrosion Resistance of Zn-2.5Al-3Mg Alloy[J]. Rare Metal Materials and Engineering,2023,52(8):2737~2745.]
DOI：10.12442/j. issn.1002-185X.20220941

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  • 收稿日期:2022-12-03
  • 最后修改日期:2023-06-01
  • 錄用日期:2023-03-20
  • 在線發(fā)布日期: 2023-08-25
  • 出版日期: 2023-08-24