铸造技术2025，Vol.46Issue(2)：176-186,11.DOI:10.16410/j.issn1000-8365.2025.4261
Cu、Mg元素对挤压铸造Al-Si-Mg-Cu合金耐蚀性能的影响
Effect of Cu and Mg on the Corrosion Resistance of Squeeze Casting Al-Si-Mg-Cu Alloy
摘要
Abstract
Mg and Cu can significantly improve the strength of Al-Si alloys,but at the same time,they also affect their corrosion resistance.To explore the influence of Mg and Cu on Al-Si alloys,which are based on an Al-7 wt.%Si-0.3 wt.%Mg alloy,electrochemical testing methods were used to analyse the effects of the addition of Mg and Cu on the corrosion resistance of Al-Si-Mg-Cu alloys after T6 heat treatment.The results show that with increasing contents of Mg and Cu and increasing corrosion time,the impedance value of the Al-7 wt.%Si-Mg-Cu alloy decreases,the radius of the Nyquist capacitance loop decreases,the corrosion current density increases,and the corrosion resistance of the alloy tends to decrease.When the content of Mg increases from 0.3 wt.%to 0.5 wt.%,the corrosion current density increases by 3.5%,and when the content of Cu increases from 0 wt.%to 0.65 wt.%,the corrosion current density increases by 10.1%.This indicates that with a slight increase in the contents of Mg and Cu,the corrosion resistance of the alloy slightly decreases.Although the nanophases precipitated by Mg and Cu during the aging process accelerate corrosion,the corrosion damage caused by the addition of a small amount of Mg and Cu to the alloy is relatively light.关键词
Al-Si-Mg-Cu/耐腐蚀性能/电化学/纳米相Key words
Al-Si-Mg-Cu/corrosion resistance/electrochemistry/nanophase分类
矿业与冶金引用本文复制引用
周威虎,陈来,王东涛,王瑞,李聪,李振宇,闫炫杰,长海博文..Cu、Mg元素对挤压铸造Al-Si-Mg-Cu合金耐蚀性能的影响[J].铸造技术,2025,46(2):176-186,11.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）
