铸造及半固态成型镁-铝-锌合金在盐水中的腐蚀行为
Corrosion Behavior of As-Casted and Semisolid Mg-Al-Zn Alloys in Salt Solution
摘 要
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.
铸造
半固态成型
腐蚀行为
Mg-Al-Zn alloy
as-cast
semisolid
corrosion behavior
Abstract
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 element 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.
中图分类号 TG146
所属栏目 材料性能及其应用
基金项目 吉林省科技发展计划资助项目(20030503-1);吉林大学“九八五工程”科技创新平台资助项目
收稿日期 2009/2/11
修改稿日期 2009/8/18
网络出版日期
作者单位点击查看
备注张倩倩(1981-),女,辽宁凌源人,讲师,博士.
引用该论文: ZHANG Qian-qian,CAO Zhan-yi,LIU Yong-bing. Corrosion Behavior of As-Casted and Semisolid Mg-Al-Zn Alloys in Salt Solution[J]. Materials for mechancial engineering, 2010, 34(2): 52～55
张倩倩,曹占义,刘勇兵. 铸造及半固态成型镁-铝-锌合金在盐水中的腐蚀行为[J]. 机械工程材料, 2010, 34(2): 52～55
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【4】宋雨来,刘耀辉,朱先勇,等.压铸镁合金腐蚀行为研究进展[J].铸造,2007,56(1):36-40.
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【6】FAN Z.Semisolid metal process[J].International Materials Reviews,2002,47(2):49-85.
【7】胡红军,杨明波,彭东,等.镁合金触变注射成形技术综述[J].铸造,2006,55(8):763-766.
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【10】李海宏,陈体军,郝远,等.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,2007,40(10):12-15.
【11】徐卫军,吕维玲,郝远,等.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,2006,35(8):18-20.
【12】张友法,李世龙,曹占义,等.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,2007,27(2):369-372.
【13】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(3):19-23.
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