| 摘要 |
PURPOSE:To develop a powdery compounding agent for electroless Ni plating which is easy to carry and store and yields easily a desired concn. of electroless Ni plating liquid by heating nickel sulfate having deliquescence or nickel chloride and other additives respectively at specific temps. and mixing these materials in the form of powder. CONSTITUTION:NiSO4.6H2O and NiCl2.6H2O having deliquescence are respectively heated for >=30min at 110-270 deg.C and 64-270 deg.C to form the powder of NiSO4 and NiCl2 having no deliquescence. The powder contg. >=1 kind thereof as an Ni ion source is used and additives such as sodium hypophosphite, sodium acetate, malic acid, ammonium carbonate, sodium hydrogencarbonate, etc. heated for >=20min at 40-190 deg.C are used. The powder and additives are mixed respectively at prescribed ratios, by which the compounding agent for electroless Ni plating liquid is produced. The agent in the powder form has no deliquescence and is handled conveniently. A prescribed concn. of electroless Ni plating liquid is obtd. easily by adding water and dissolving said agent. |
