【摘要】 提出了一种采用HF与HNO3退除镁合金上化学镀镍磷镀层的方法。测试了不同HF与HNO3组合的退镀液的性能,并分别测定了不同HF与HNO3含量对退镀效果的影响。结果表明,退镀液中含有一定含量的F-,可保护基体不受腐蚀,其生成的保护膜主要为MgF2。当退镀液中w(HF)∶w(HNO3)∶w(H2O)为4∶3∶3时,效果最好。由于HF有剧毒,因此操作过程应采取相应的防护措施。更多还原

【Abstract】 A method using HF and HNO₃ to strip electroless Ni-P coating on Mg alloy substrate was proposed. The performance of stripping solution with different content of HF and HNO₃ and the influence of different content of HF and HNO₃ on stripping effect were tested respectively. The results prove that a quantity of F^- in stripping solution can protect the substrate from corrosion by forming protective film which mainly is MgF₂. When （w（HF）∶）w（HNO₃）∶w（H₂O） is 4∶3∶3, the stripping solution has best stripping effect. Because HF has severe toxicity, protective measures must be taken during operation.更多还原