【摘要】 通过添加适量的添加剂,采用正交试验方法,研究了高氯化铵质量浓度下在Q235钢基体上低温电镀Ni-P合金的工艺参数。实验得出最佳工艺条件为:NiSO₄·6H₂O 40g/L、NaH₂PO₂·H₂O 30g/L、H₃BO₃ 15g/L、NH₄Cl 32g/L、添加剂T1 0.12g/L、添加剂T2 0.03g/L、添加剂T3 0.1g/L、施镀温度45℃、电流密度0.015A/cm²、pH=4。最佳工艺条件下所获镀层的EDS分析表明,镀层由靠近基体部位到镀层表面部位,P质量分数变化情况为6.61%→7.18%→8.73%。随着离基体距离的增大,镀层显微结构由晶态向微晶转化,最后为完全非晶态。更多还原

【Abstract】 By adding high concentrations of ammonium chloride and an appropriate amount of additives,the process parameters of electroplating Ni-P alloy plating on Q235 steel substrate are studied at low temperature.The optimal formulation is obtained by orthogonal test:NiSO₄·6H₂O 40g/L,NaH₂PO₂·H₂O 30g/L,H₃BO₃ 15g/L, NH₄Cl 32g/L,additive T1 0.12g/L,additive T2 0.03g/L,additive T3 0.1g/L,plating temperature 45℃,current density 0.015A/cm²,pH=4.EDS analysis of the coating made by optimal formulation indicates:from the part near substrate to the centre,and from the centre to the surface,the weight percentage of P ranges 6.61%→7.18%→8.73%.The microstructure of these coatings change from crystal to microcrystal,and finally to completely amorphous with increasing distance form the substrate.更多还原