EPM A and ICP tests show that Al element are uniformly dispersed in zinc coatings containing A1(OH)3 or Al particles, though aluminium content in the former is 50 ppm and in the latter, 0.15wt%.

• EPMA和ICP显示含氢氧化铝和含铝粉镀层中的铝呈均匀分布状态；但前者铝的含量为50ppm；后者为0.；15wt%25。