探讨了在铝基体上化学镀镍-磷合金镀层的工艺中,采用酸性条件下直接置换锌进行前处理的可行性,并用正交实验法对该预处理工艺进行了优化。 结果表明:当置换时间为 10 s,HF 用量为 10 mL / L,置换温度为 25 ℃ ,OP 乳化剂用量为 20 mL / L 时,施镀后,可得到厚约 38 μm,硬度约 503 HV,且与基体结合良好的高磷镍-磷合金镀层。

Discussed Ni-P alloy plating process on aluminium substrate of electroless, used acid zinc directly under the condition of displacement to the feasibility of pretreatment and optimized the pretreatment process using the orthogonal experiment method. The experiments show that the high phosphorous nickel-phosphorus alloy coating can been got when the replacement time is 10 s, the HF concentration is 10 mL / L, the replacement temperature is 25 ℃ , OP emulsifier concentration is 20 mL / L. The thickness of the coating is about 38 μm, the hardness of the coating is about 503 HV, the combines of the coating with the aluminum substrates is well .