铸造技术2025，Vol.46Issue(2)：167-175,9.DOI:10.16410/j.issn1000-8365.2025.4250
V、Zr复合微合金化调控Al-Si-Cu-Mg合金耐蚀性能研究
Study of the Corrosion Resistance of Al-Si-Cu-Mg Alloy Enhanced by V and Zr Co-microalloying
摘要
Abstract
Al-Si-Cu-Mg series alloys with high Cu contents are widely used in automotive engineering because of their excellent strength and toughness,but the inclusion of Cu greatly reduces their corrosion resistance,limiting their application range.Therefore,on the basis of the commonly used Al-9Si-4Cu-0.22Mg alloy,the effects of V and Zr co-microalloying on the corrosion resistance of the alloy were investigated via microstructure observation and electrochemical testing.The results show that the addition of both V and Zr improve the corrosion resistance.However,when the addition of V exceeds 0.13 wt.%,the corrosion resistance of the alloy decreases.The corrosion morphology observations reveal that V and Zr co-microalloying significantly reduce the tendency for pitting.The electrochemical test results show that the A12 alloy with 0.13 wt.%V and 0.19 wt.%Zr has the best corrosion resistance,with a corrosion current density reduction of 51.6%and an equivalent passive film thickness increase of 129%.The strengthening of the passive film is the main reason for the improved corrosion resistance.关键词
Al-Si-Cu-Mg合金/V、Zr含量/耐蚀性/电化学分析Key words
Al-Si-Cu-Mg alloy/V,Zr addition/corrosion resistance/electrochemical analysis分类
矿业与冶金引用本文复制引用
刘志斌,王瑞,王东涛,钟纪康,张鸣鹤,张孝足,孙岚曦,伍复发,长海博文..V、Zr复合微合金化调控Al-Si-Cu-Mg合金耐蚀性能研究[J].铸造技术,2025,46(2):167-175,9.基金项目
轧制技术及连轧自动化国家重点实验室开放基金(2022RALKFKT008) （2022RALKFKT008）
