通过光学显微镜、SEM和EDS等研究了不同成分铸造及半固态成型镁-铝-锌合金在盐水浸泡试验中的腐蚀行为.结果表明:当合金的锌含量(质量分数,下同)低于1%时,铸造试样的腐蚀速率高于其相应半固态成型试样的;当锌含量高于3%时,铸造试样的腐蚀只发生在表面,腐蚀速率低于其相应半固态成型试样的;腐蚀速率受合金锌含量及固相颗粒尺寸和数量的共同影响,合金锌元素含量越高,铸造试样的腐蚀速率越低;半固态成型试样的固相颗粒数量越多、尺寸越小,则腐蚀速率越高.
The corrosion behaviors in salt solution immersion test of as-casted and semisolid Mg-Al-Zn alloys with different compositions were analyzed by optical microscopy,SEM and EDS.The results demonstrate that when the content of zinc ekxnent was less than 1wt%,the corrosion rate of as-casted specimens was higher than that of the corresponding semisolid specimens.When the content of zinc element was more than 3wt%,the corrosion rate of as-casted specimens was lower than that of the corresponding semisolid specimens,and the corrosion of as-casted specimens occurred on the surface.The corrosion rate was affected by zinc content and solid particle size and quantity.The higher the zinc content,the lower the corrosion rate of as-casted specimens.The more the solid particle number and the smaller the solid particle size,the higher the corrosion rate of semisolid specimens.
参考文献
| [1] | 左铁镛.21世纪的轻质结构材料--镁及镁合金发展[J].新材料产业,2007(12):22-26. |
| [2] | 王渠东,吕宜振,曾小勤,丁文江,卢晨.镁合金在电子器材壳体中的应用[J].材料导报,2000(06):22-24. |
| [3] | 宋雨来,刘耀辉,朱先勇,王素环.压铸镁合金腐蚀行为研究进展[J].铸造,2007(01):36-40. |
| [4] | Z. Y. Nan;S. Ishihara;T. Goshima .Corrosion fatigue behavior of extruded magnesium alloy AZ31 in sodium chloride solution[J].International Journal of Fatigue,2008(7):1181-1188. |
| [5] | Z. Fan .Semisolid metal processing[J].International Materials Reviews,2002(2):49-85. |
| [6] | 胡红军,杨明波,彭东,王春欢.镁合金触变注射成形技术综述[J].铸造,2006(08):763-766. |
| [7] | 樊昱,吴国华,高洪涛,翟春泉.镁合金腐蚀的研究现状及发展趋势[J].铸造技术,2004(12):941-944. |
| [8] | 李海宏,陈体军,郝远,侯伟骜,吕维玲.触变成形AZ91D镁合金在NaCl溶液中的应力腐蚀行为研究[J].材料保护,2007(10):12-15,44. |
| [9] | 徐卫军,吕维玲,郝远,陈体军,马颖.触变成形AZ91D镁合金腐蚀过程中表面合金元素浓度变化分析[J].热加工工艺,2006(08):18-20,24. |
| [10] | 张友法,李世龙,曹占义,张倩倩,王媛.半固态镁合金微观组织定量分析的应用[J].特种铸造及有色合金,2007(05):369-372. |
| [11] | 张汉茹,郝远.AZ91D镁合金在含Cl-溶液中腐蚀机理的研究[J].铸造设备研究,2007(03):19-23,27. |
| [12] | Guang Ling Song;Andrej Atrens .Corrosion mechanisms of magnesium alloys[J].Advanced Engineering Materials,1999(1):11-33. |
| [13] | 吴振宁,李培杰,刘树勋,曾大本.镁合金腐蚀问题研究现状[J].铸造,2001(10):583-586. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%