2A02硬铝合金不同热处理后的腐蚀行为
发布时间：2019-02-21 15:59
【摘要】：对2A02硬铝合金进行了不同的时效处理,然后进行了腐蚀性能检测。采用恒温浸泡方法、极化曲线测量、扫描电镜等手段研究了不同时效处理对合金的组织及性能尤其是晶间腐蚀性能的影响。结果表明:对于单级时效而言,自然时效析出相较少,随时效温度升高,析出相增多,但大量析出相存在于晶界;两级时效析出相细小弥散,且均匀分布于晶内。硬铝合金的电化学腐蚀过程以晶间腐蚀为主,随时效温度的升高,耐蚀性增强。两级时效可获得均匀的晶粒结构与细小弥散的析出相分布形态,材料的耐蚀性能最好。
[Abstract]:The 2A02 hard aluminum alloy was subjected to different aging treatments and then a corrosion test was carried out. The effects of different aging treatments on the microstructure and properties of the alloy, especially the intercrystalline corrosion, were studied by means of constant temperature immersion method, polarization curve measurement and scanning electron microscope. The results show that, for single-stage aging, the natural aging phase is small, the temperature is increased at any time, the precipitation phase is increased, but a large amount of precipitation phase exists in the grain boundary, and the two-stage aging precipitation phase is fine and dispersed, and is uniformly distributed in the crystal. The electrochemical corrosion process of the hard aluminum alloy is mainly intergranular corrosion, and the temperature at any time is increased and the corrosion resistance is enhanced. the two-stage aging can obtain a uniform crystal grain structure and a fine dispersed precipitation phase distribution form, and the corrosion resistance of the material can be best.
【作者单位】： 河南科技大学材料科学与工程学院;亚稳材料制备技术与科学国家重点实验室(燕山大学);有色金属共性技术河南省协同创新中心;
【基金】：河南省基础与前沿技术研究计划项目(132300413212) 亚稳材料制备技术与科学国家重点实验室开放课题(201411) 河南科技大学创新能力培育基金项目(2014ZCX007)
【分类号】：TG166.3;TG146.21
本文编号：2427649
[Abstract]:The 2A02 hard aluminum alloy was subjected to different aging treatments and then a corrosion test was carried out. The effects of different aging treatments on the microstructure and properties of the alloy, especially the intercrystalline corrosion, were studied by means of constant temperature immersion method, polarization curve measurement and scanning electron microscope. The results show that, for single-stage aging, the natural aging phase is small, the temperature is increased at any time, the precipitation phase is increased, but a large amount of precipitation phase exists in the grain boundary, and the two-stage aging precipitation phase is fine and dispersed, and is uniformly distributed in the crystal. The electrochemical corrosion process of the hard aluminum alloy is mainly intergranular corrosion, and the temperature at any time is increased and the corrosion resistance is enhanced. the two-stage aging can obtain a uniform crystal grain structure and a fine dispersed precipitation phase distribution form, and the corrosion resistance of the material can be best.
【作者单位】： 河南科技大学材料科学与工程学院;亚稳材料制备技术与科学国家重点实验室(燕山大学);有色金属共性技术河南省协同创新中心;
【基金】：河南省基础与前沿技术研究计划项目(132300413212) 亚稳材料制备技术与科学国家重点实验室开放课题(201411) 河南科技大学创新能力培育基金项目(2014ZCX007)
【分类号】：TG166.3;TG146.21
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