摘要
通过全浸泡法和失重法研究了Al-8Si合金在5%Na Cl(p H=6.5~7.2)溶液中的腐蚀行为,并观察了腐蚀前后Al-8Si合金组织形貌的变化。结果表明,合金质量减少量与时间呈幂函数关系;腐蚀从共晶Si相附近及晶界处优先开始,以晶间腐蚀和点蚀为主。
The corrosion behaviors of Al-8Si alloy in 5%NaCl （pH=6.5-7.2） solution was investigated by the methods of full immersion and mass loss, and the variation of microstructures of the alloy before and after corrosion was observed. The results show that the mass loss of the Al-8Si alloy presents a power fimction relationship on the corrosion time. The corrosion occurs preferentially near the eutectic Si phase and grain boundary. The corrosions are mainly intercrystalline corrosion and the pitting corrosion.
出处
《铸造技术》
北大核心
2017年第10期2356-2359,2364,共5页
Foundry Technology
基金
广西大学行健文理学院自然科学基金资助项目(2015ZKLX02)
广西有色金属及特色材料加工重点实验室开放课题基金资助项目(GXKFJ16-02)
广西教育厅科研资助项目(2017KY0032)
关键词
Al-8Si合金
腐蚀行为
点蚀
晶间腐蚀
Al-8Si alloy
corrosion behaviors
pitting corrosion
intercrystalline corrosion
