水热封孔处理对半固态Al-2Si合金阳极氧化膜耐蚀性影响
Influence of Hydrothermal Sealing on Corrosion Resistance of Anode Oxide Film of Semi-solid Al-Si Alloy
朱柏崴 1庄百亮 2周士鼎 1朱天宇 1安蓉蓉 2傅诤之 3刘二亮1
作者信息
- 1. 常州大学机械与轨道交通学院,常州 213000
- 2. 中国机械总院集团江苏分院有限公司,常州 213100
- 3. 福建金瑞高科有限公司,三明 353301
- 折叠
摘要
研究了水热封孔处理对半固态成形Al-2Si合金表面阳极氧化层耐蚀性能的影响.结果表明,水热封孔处理后,半固态成形Al-2Si合金试样表面阳极氧化膜产生大量裂纹,且裂纹主要集中于共晶区的氧化膜区域;由于裂纹存在,水热封孔处理后试样耐蚀性极差;分析蚀坑可知,经过水热封孔处理试样表面腐蚀严重,蚀坑数量明显多于未经水热封孔处理试样.这些蚀坑主要位于共晶组织部位,且在蚀坑中观察到富Fe金属间化合物,这表明引起蚀坑的主要因素仍为Al-Si基体中的富Fe金属间化合物.
Abstract
The influence of hydrothermal sealing(HTS)treatment on the corrosion resistance of anodized Al-2Si alloy by semi-solid casting was investigated.The results reveal that large amounts of cracks are generated in the anodized layer after HTS treatment,which are mainly aggregated in the oxide film of eutectic region,resulting in poor corrosion resistance.Corrosion pit analysis indicates that the anodized surface shows a severe corrosion,and amounts of pits are significantly higher than that of specimens without HTS,which are mainly located in the eutectic region.Fe-rich inter-metallic particles are observed in the corrosion pits,indicating that the formation of corrosion pits is induced by Fe-rich intermetallic particles in Al-Si matrix.
关键词
半固态成形/Al-2Si合金/阳极氧化/耐蚀性Key words
Semi-solid Casting/Al-2Si Alloy/Anodizing/Corrosion Resistance引用本文复制引用
基金项目
江苏省产学研合作资助项目(BY2021333)
江苏省科技基础设施建设计划资助项目(BK20230632)
安徽省重点研究与开发计划资助项目(202104G01020019)
江苏省自然科学基金资助项目(BK20211069)
江苏省高等学校自然科学研究资助项目(20KJB460009)
出版年
2024
NETL
NSTL
万方数据