中南大学学报（自然科学版）2012，Vol.43Issue(12)：4666-4670,5.
添加Zn对5083铝合金组织和腐蚀性能的影响
Effect of addition of Zn on microstructure and corrosion property of 5083Al alloy
摘要
Abstract
5083Al alloy, 5083Al alloy containing 0.7% Zn (mass fraction), ?Al3Mg2) phase, t(Mg32(Al,Zn)49) phase were prepared by cast metallurgy. The microstructures and corrosion properties of alloys by 180 ?, 2 h annealing after cold-rolled were studied by TEM, exfoliation corrosion test and polarization curve measurement. The electrochemical properties of ?phase, t-phase and a(Al) were studied by polarization curve measurement. The results show that rod-like ?phase precipitations are distributed continuously along the grain boundary of 5083A1 alloy without Zn and the susceptibility to exfoliation corrosion is high, while globular r-phase precipitations are distributed discontinuously along the grain boundary and formed uniformly in the grain interior of 5083A1 alloy with Zn and alloy has low exfoliation corrosion susceptibility. The corrosion potential of?phase, t-phase and a(Al) is -1.085 V, -0.813 V and -0.812 V respectively, and t-phase improves the corrosion performance of Al-5083 alloy.关键词
5083铝合金/锌/τ相/剥落腐蚀Key words
5083A1 alloy/ Zn/ t-phase/ exfoliation corrosion分类
矿业与冶金引用本文复制引用
杨磊,罗兵辉,占戈,柏振海..添加Zn对5083铝合金组织和腐蚀性能的影响[J].中南大学学报（自然科学版）,2012,43(12):4666-4670,5.基金项目
国家"十一五"科技军工配套项目(JPPT-115-2-1133) （JPPT-115-2-1133）
