挤压变形对金属镁耐腐蚀性能的影响
Influence of Extrusion Deformation on Corrosion Rate of Pure Magnesium
摘 要
在35 g·L-1NaCl水溶液中,用失重法、气体收集法和电化学方法研究了挤压变形对金属镁耐腐蚀性能的影响.结果表明：金属镁在挤压变形的过程中发生了动态再结晶,由大至几百微米大小不均匀的晶粒变为约25 μm的等轴晶,晶粒细化,晶界的面积增多,即阳极增多,阳极反应速率增加,耐腐蚀性能下降.
晶粒细化
耐腐蚀性能
挤压变形
pure magnesium
grain refinements
corrosion resistance
extrusion deformation
Abstract
Influence of extrusion deformation on the corrosion rate of pure magnesium was studied by means of weight loss,gas collection and electrochemical methods in 35 g·L-1 NaCl solution.The results show that the dynamic re-crystallization of pure magnesium occurres during the process of the extrusion deformation and the grain size is decreased from the size of a few hundreds micro meter (μm) to 25 μm.The area of grain boundaries as the anode is increased by the deformation.The reaction rate of the anode is much quicker than the magnesium without deformation and the corrosion resistance is decreased.
中图分类号 TG174.1
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收稿日期 2007/6/30
修改稿日期 2007/9/1
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备注王赫男(1974-),女,辽宁沈阳人,讲师,硕士.
引用该论文: WANG He-nan,ZHAO Yu-hua,ZHANG Wei-xia. Influence of Extrusion Deformation on Corrosion Rate of Pure Magnesium[J]. Materials for mechancial engineering, 2008, 32(3): 42～44
王赫男,赵玉华,张伟霞. 挤压变形对金属镁耐腐蚀性能的影响[J]. 机械工程材料, 2008, 32(3): 42～44
被引情况:
【1】祁玉红,付巳超,高红,陈刚,陈旭, "AZ31镁合金板在PBS模拟体液中的腐蚀行为和拉伸性能",机械工程材料 38, 16-19(2014)
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参考文献
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【4】Reidar Tunold,Hans Holtan,May-britt,et al.The corrosion of magnesium in aqueous solution containing chloride ions[J].Corrosion Science,1997,17:353-365.
【5】Greenbaltt J.A mechanism for the anodic dissolution of magnesium[J].Journal of the Electrochemistry Society,1956,103:539-547.
【6】Letzig D,Swiostek J,Bohlen J,et al.Magnesium Wrought Alloy Properties of the AZ-Series[C]//Magnesium Technology 2005.San Francisco,US:TMS (The Mineral,Metals & Materials Society),2005:55-59.
【7】Haitao Zhou,Chuming Liu,Qudong Wang,et al.Grain Refinement of Wrought AZ61 Magnesium Alloy[C]//Magnesium Technology 2005.San Francisco,US:TMS (The Mineral,Metals & Materials Society),2005:91-95.
【8】孙秋霞.材料腐蚀与防护[M].北京:冶金工业出版社,2003.
【9】Song G L,Atrens A,St John D.An Hydro-evolution Method for the Estimation of the Corrosion Rate of Magnesium alloys[C]//Magnesium Technology 2001.San Francisco,US:TMS (The Mineral,Metals & Materials Society),2001:255-259.
【10】Simaranov A Y,Sokolova I,Marshaknv A I,et al.Nature of the film on AZ91 magnesium alloy[J].Protection of Metal,1992,27:329-335.
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