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鎂合金在多因素耦合作用下的腐蝕行為
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國(guó)家自然科學(xué)基金 (51001079);中國(guó)博士后科學(xué)基金 (20100471586);山西省高等學(xué)校青年學(xué)術(shù)帶頭人支持計(jì)劃;山西省自然科學(xué)基金 (2011011020-2)


Corrosion Behavior of Magnesium Alloys under the Multi-Factor Coupling Effects
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    摘要:

    選擇鑄態(tài)和擠壓態(tài)AZ61鎂合金,采用SEM、XRD和電化學(xué)測(cè)試等分析手段,研究在120 ℃和1.8 MPa的NaCl氣氛中鎂合金的腐蝕形貌和腐蝕機(jī)理。結(jié)果表明,在NaCl氣氛、溫度、壓力和合金組織狀態(tài)等多因素耦合作用下,由于β相重新分布以及晶粒尺寸變小,使得擠壓態(tài)AZ61鎂合金的腐蝕速率大于鑄態(tài)的腐蝕速率,但腐蝕產(chǎn)物均以Mg(OH)2為主。較高的溫度與NaCl氣氛共同作用是加快鎂合金腐蝕的主要原因

    Abstract:

    The cast AZ61 magnesium alloy and the extruded alloy were chosen to study the corrosion morphology and mechanism by means of SEM, XRD and electrochemical testing, under the NaCl atmosphere at 120 oC and 1.8 MPa. The results show that due to the multi-factor coupling effects of NaCl atmosphere, temperature, pressure and microstructure, the corrosion rate of the extruded AZ61 magnesium alloy is larger than that of the cast AZ61 alloy, because of the re-distribution of β phases and smaller grain size. But both of the corrosion products are mainly Mg(OH)2. The environmental factors play an important role in the corrosion behavior of magnesium alloys. Higher temperature and sodium chloride atmosphere work together to accelerate the corrosion rate of Mg alloys

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侯利鋒,田 赟,李永剛,衛(wèi)英慧.鎂合金在多因素耦合作用下的腐蝕行為[J].稀有金屬材料與工程,2014,43(3):636~640.[Hou Lifeng, Tian Yun, Li Yonggang, Wei Yinghui. Corrosion Behavior of Magnesium Alloys under the Multi-Factor Coupling Effects[J]. Rare Metal Materials and Engineering,2014,43(3):636~640.]
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  • 收稿日期:2013-03-18
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  • 在線發(fā)布日期: 2014-06-27
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