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Mn添加對擠壓態(tài)Mg-Zn-Y-Nd合金微觀組織和腐蝕行為的影響
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1.太原科技大學;2.太原理工大學

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山西省高等學?？萍汲晒D化項目（TSTAP），山西省新興產業(yè)領軍人才項目，中央引導地方科技發(fā)展專項資金項目（YDZX20181400002967），山西省研究生優(yōu)秀創(chuàng)新項目（2019Y483）。


Microstructure and corrosion behavior of extruded Mg-Zn-Y-Nd alloy respect to Mn addition
Author:
Affiliation:

1.Taiyuan University of Science and Technology;2.Taiyuan University of Technology

Fund Project:

Transformation of Scientific and Technological Achievements Programs of Higher Education Institutions in Shanxi (TSTAP), the Leading Talents in Emerging Industries of Shanxi Province, the Central Special Funds Guiding the Development of local Science and Technology（YDZX20181400002967）, the Graduate Innovation Project of Shanxi Province (2019Y483).

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    摘要:

    通過光學顯微鏡，配備能量色散光譜儀的掃描電子顯微鏡，X射線衍射儀，浸泡法和電化學測試的方法研究了Mn的添加對擠壓Mg-Zn-Y-Nd合金在3.5wt.％NaCl溶液中的微觀組織和腐蝕行為的影響。結果表明，在研究的Mg-Zn-Y-Nd合金中添加Mn可以誘導Mg3Y2Zn3（I相）沉淀，可以抑制熱擠壓過程中動態(tài)再結晶（DRX）晶粒的粗化。同時，添加了Mn也可以提高合金的耐腐蝕性。不含Mn的Mg-5.6Zn-1Y-0.4Nd合金與含錳1.0 wt.％的Mg-5.6Zn-1Y-0.4Nd合金腐蝕速率分別為18.78 mm·y-1和9.89mm·y-1。而耐腐蝕性的提高主要歸因于腐蝕產物層保護性的增強。

    Abstract:

    The effect of Mn addition on the microstructure and corrosion behavior of extruded Mg-Zn-Y-Nd alloy immersed in 3.5 wt.% NaCl solution were studied by optical microscope, scanning electron microscope equipped with energy dispersive spectroscope, X-ray diffraction, immersion, and electrochemical measurements. Results suggest that the Mn addition in the studied Mg-Zn-Y-Nd alloy can induce Mg3Y2Zn3 (I-phase) precipitation which may inhibit dynamic recrystallizaiton (DRX) grain coarsening during hot extrusion. Meanwhile, its corrosion resistance was improved owing to the addition of Mn. The corrosion rates of free and 1.0 wt.% Mn containing Mg-5.6Zn-1Y-0.4Nd alloys were 18.78 and 9.89 mm·y?1, respectively. The improvement of corrosion resistance is mainly due to an enhanced protectiveness of the corrosion product layer.

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引用本文

劉寶勝,王亞寧,張躍忠,侯利鋒,衛(wèi)英慧. Mn添加對擠壓態(tài)Mg-Zn-Y-Nd合金微觀組織和腐蝕行為的影響[J].稀有金屬材料與工程,2021,50(1):49~55.[劉寶勝,wangyaning, zhangyuezhong, houlifeng, weiyinghui. Microstructure and corrosion behavior of extruded Mg-Zn-Y-Nd alloy respect to Mn addition[J]. Rare Metal Materials and Engineering,2021,50(1):49~55.]
DOI：10.12442/j. issn.1002-185X.20191005

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  • 收稿日期:2019-11-28
  • 最后修改日期:2019-12-09
  • 錄用日期:2019-12-10
  • 在線發(fā)布日期: 2021-02-05
  • 出版日期: