通过正交试验对比分析了镀液pH值,主盐、还原剂以及络合剂浓度等因素对铝基表面化学镀镍-磷镀层磷含量及镀速的影响.结果表明:镀液pH值的影响最主要,其次为主盐和还原剂浓度;对于选定成分的酸性(3.5≤PH≤6)镀液,随pH值的增大,镀层磷原子分数由22.50o(pH=3.5)逐渐减至12.600(pH=6.0),而镀速随pH值的增大而增加,达到最大值21.0 μm·h-1(pH=5.0)后变化不大;镀层磷含量随主盐NiSO4浓度增大而降低,随还原剂NaH2PO2浓度增大而增加,而主盐和还原剂浓度的增大都可增加镀速;最终获得了磷原子分数为15.2%,镀速达到21.0 μm·h-1的镀层.
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