The invention discloses a novel acidic
zinc-plating additive. The additive comprises the following components of, in percentage by weight, 25%-35% of
fatty alcohol-
polyoxyethylene ether sulphonate, 8%-12% of octyl
phenol polyoxyethylene ether; 3%-8% of
fatty alcohol-
polyoxyethylene ether block
copolymer, 0.2%-0.8% of benzyl fork
acetone, 0.2%-0.8% of o-chlorobenzaldehyde, 2%-7% of high-purity diffusant NNO, 2%-7% of
sodium benzoate, 0.8%-1.2% of nicotinic acid, 0.8%-1.2% of
cinnamic acid and the balance pure water. According to the additive, a
zinc-plated layer with good brightness, leveling and
ductility can be rapidly obtained in acid
zinc-plating; the
cloud point is high, the
temperature resistance is good, the current efficiency is high, the light emitting speed is fast, throwing is good, the efficiency is high, and the zinc-plated layer is suitable for rolling plating and hanging plating; the zinc-plated layer is compact in
crystallization, non-brittle of zinc and free of foaming,various blue-white and colorful
passivation treatment can be easily accepted, and the
corrosion-resistant performance is excellent; and the consumption of the additive is less in the plating liquid,supplement and maintenance are convenient, and the additive is economical and practical.