下列配方适合于不锈钢等易钝化基体预镀镍的是::( )
A、NiSO4·7H2O120~150g/L,NaCl7~12g/L,H3BO330~45g/L,pH5.0-5.6
B、NiSO4·7H2O240~260g/L,HCl120~130mL/L
C、NiSO4·7H2O200~250g/L,NaCl7~12g/L,H3BO320-25g/L,柠檬酸钠50-300g/L,pH7.0~7.2
D、NiSO4·7H2O150g/L,NH4Cl20g/L,H3BO325g/L,pH5.6-5.9
发布时间:2024-11-03 23:52:43