Zn含量对Al-Zn-Mg-Cu合金挤压棒材耐剥落腐蚀性能的影响

杨臻珅,刘胜胆,唐建国,叶凌英

Effect of Zn Content on Exfoliation Corrosion Resistance of Al-Zn-Mg-Cu Alloy Extruded Rod

Zhenshen YANG,Shengdan LIU,Jianguo TANG,Lingying YE

表3 图8中第二相粒子在短时浸泡过程中化学成分变化

Table 3 The changes of chemical composition of second phase particles in Fig.8 during immersion

Particles Immersion time/min Elements (%, atomic fraction) Zn Mg Cu Fe Na Al A 0 2.51 0.14 3.70 13.16 - 80.49 20 2.39 0.25 3.99 13.03 - 80.34 80 3.73 0.98 6.81 20.39 - 68.09 B 0 14.87 24.01 10.64 - - 50.48 20 4.64 4.07 24.47 - 5.43 61.39 80 5.14 2.56 19.16 - - 73.14 C 0 14.64 19.50 10.45 - - 55.41 20 5.46 2.61 0.91 - - 91.02 80 4.21 3.38 0.82 - - 91.59