电解铜箔镀锌镍钴合金及其性能

Znic–nickel–cobalt alloy plating on electrolytic copper foil and its performance

对电解铜箔的毛面电镀锌镍钴合金。镀液组成和工艺条件为：NiSO4·6H2O 15-30 g/L,ZnSO4·7H2O 5-15 g/L,CoSO4·7H2O 2-4 g/L,配位剂110-150 g/L,添加剂B 0.1-0.5 g/L,温度50-60°C,pH 8-11,电流密度2~6 A/dm2,时间3-5 s。对镀锌镍钴合金镀层的微观结构、高温抗变色性、抗拉强度、耐热性、耐蚀性等性能进行表征。结果表明,所得锌镍钴合金镀层均匀,呈暗红色,对电解铜箔抗拉强度和延伸率的影响不大。镀锌镍钴合金铜箔的耐热性和耐蚀性优于镀锌镍合金铜箔。另外,镀锌镍钴合金铜箔的高温抗变色性和蚀刻性极好,在蚀刻过程中铜箔无侧蚀现象。

Zinc–nickel–cobalt alloy plating was carried out on the rough side of electrolytic copper foil. The bath composition and process conditions are as follows： NiSO4·6H2O 15-30 g/L, ZnSO4·7H2O 5-15 g/L, CoSO4·7H2O 2-4 g/L, complexant 110-150 g/L, additive B 0.1-0.5 g/L, temperature 50-60 °C, pH 8-11, current density 2-6 A/dm2, and time 3-5 s. The properties of zinc–nickel–cobalt plated copper foil such as microstructure, discoloration resistance at high temperature, tensile strength, heat resistance, and corrosion resistance were characterized. The results showed that the zinc–nickel–cobalt coating obtained is uniform and dark red, and has little effect on the tensile strength and elongation of electrolytic copper foil. The zinc–nickel–cobalt plated copper foil has better heat and corrosion resistance than the zinc–nickel plated copper foil, excellent discoloration resistance at high temperature, and favorable etching performance. No undercut phenomenon is observed during the etching of zinc–nickel–cobalt plated copper foil.