| 湿热条件下超塑性锌铝合金的晶间腐蚀研究 |
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| 引用本文： | 沈磊,宋振纶.湿热条件下超塑性锌铝合金的晶间腐蚀研究[J].腐蚀科学与防护技术,2012(2):153-157. |
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| 作者姓名： | 沈磊 宋振纶 |
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| 作者单位： | 中国科学院宁波材料技术与工程研究所 |
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| 基金项目： | 国家支撑计划项目(2009BAE71B05);宁波市重大科技计划项目(2008B10026)资助 |
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| 摘 要： | 评估了超塑性锌铝合金在高温高湿环境下晶间腐蚀的程度.在铝含量为(1～22)mass%的范围内,耐蚀性呈不单调变化.退火有利于提高耐蚀性.退火温度达300℃时,耐蚀性提高最多.晶间腐蚀深度由富铝相的百分比和晶粒细化两大因素综合决定.富铝相加速腐蚀,而晶粒的细化作用则阻碍腐蚀.晶间腐蚀深度随腐蚀时间延长呈线性增长.
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| 关 键 词： | 超塑性锌铝合金 腐蚀 湿热 |
Intergranular Corrosion of Superplastic Zn-Al Alloys in High Temperature and High Humidity Environment |
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| SHEN Lei,SONG Zhen-lun.Intergranular Corrosion of Superplastic Zn-Al Alloys in High Temperature and High Humidity Environment[J].Corrosion Science and Protection Technology,2012(2):153-157. |
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| Authors: | SHEN Lei SONG Zhen-lun |
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| Affiliation: | Ningbo Institute of Material Technology & Engineering,Chinese Academy of Sciences,Ningbo 315000 |
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| Abstract: | The corrosion rate of superplastic Zn-Al alloys in high temperature and high humidity environments was investigated.With mass fraction of Al in the range of(1～22) mass%,the corrosion resistance of the alloys varies unmonotonously.Annealing is favorable to increasing the corrosion resistance of the alloys.The alloys annealed 300℃showed the highest increment in corrosion resistance.Intergranular corrosion depth is determined by two factors i.e.the fraction of Al-rich phase and the grain fineness.Al rich phase deteriorates the corrosion resistance while fine grains increase the corrosion resistance.Intergranular corrosion depth is linear to corrosion time. |
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| Keywords: | superplastic Zn-Al alloys corrosion high temperature and high humidity |
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