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AM60鎂合金大氣腐蝕及動(dòng)力學(xué)分析
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太原理工大學(xué),太原理工大學(xué),太原理工大學(xué),太原理工大學(xué),太原理工大學(xué)

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中圖分類(lèi)號(hào):

TB304

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國(guó)家自然科學(xué)基金資助（項(xiàng)目號(hào)51374151, 51001079, 51208333, 21201129）;國(guó)家自然科學(xué)基金項(xiàng)目（面上項(xiàng)目，重點(diǎn)項(xiàng)目，重大項(xiàng)目）


Atmospheric Corrosion and Dynamic Analysis of AM60 Mg Alloy
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Taiyuan University of Technology,Taiyuan University of Technology,Taiyuan University of Technology,Taiyuan University of Technology,Taiyuan University of Technology

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    摘要:

    本文研究了鑄態(tài)和擠壓態(tài)AM60鎂合金在太原地區(qū)的大氣腐蝕行為。試驗(yàn)結(jié)果表明鑄態(tài)合金的腐蝕速率高于擠壓態(tài)合金。鑄態(tài)合金中的共晶組織比α-Mg更具耐大氣腐蝕能力，但是這導(dǎo)致了共晶相周?chē)摩?Mg相腐蝕嚴(yán)重，且腐蝕產(chǎn)物膜也不均勻保護(hù)性差。擠壓態(tài)合金的最大腐蝕深度要遠(yuǎn)小于鑄態(tài)合金。擠壓態(tài)合金的顯微組織比鑄態(tài)更加均勻，而且不含有共晶組織，導(dǎo)致擠壓態(tài)合金表面的腐蝕產(chǎn)物膜更加致密也更具有保護(hù)性。擠壓變形不會(huì)引起AM60鎂合金大氣腐蝕性能的下降。

    Abstract:

    Atmospheric corrosion behaviour of cast and as-extruded AM60 Mg alloy was studied in this paper. The results showed that the corrosion rate of cast alloy was higher than that of as-extruded alloy. α-Mg-Mg17Al12 eutectics in cast alloy had better corrosion resistance than α-Mg phase in outdoor atmospheric environment, which would lead to the α-Mg phase being corroded seriously than the nearby eutectics. Then, the corrosion films on as-extruded alloy would not be uniform and had a poor protective effect. The maxium depth of corrosion pit in as-extruded alloy was deeper than that in cast alloy. The as-extruded alloy had much uniform mircrostructures and did not contain eutectics than cast alloy, which caused the corrosion film formed on surface of the former had better protection effect than that on the latter’s surface. Extruded process can not lead to a decrease in atmospheric corrosion resistance of AM60 Mg alloy.

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劉東風(fēng),李永剛,衛(wèi)英慧,侯利鋒,郭春麗. AM60鎂合金大氣腐蝕及動(dòng)力學(xué)分析[J].稀有金屬材料與工程,2016,45(2):369~374.[liu dongfeng, li yonggang, wei yinghui, Hou lifeng, Guo chunli. Atmospheric Corrosion and Dynamic Analysis of AM60 Mg Alloy[J]. Rare Metal Materials and Engineering,2016,45(2):369~374.]
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歷史
  • 收稿日期:2014-03-14
  • 最后修改日期:2014-06-03
  • 錄用日期:2014-07-01
  • 在線發(fā)布日期: 2016-07-19
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