RTP CHEMIZINK Ni-S is a brightener system for acidic zinc/nickel electrolytes. With this process, zinc-nickel alloy layers with a nickel content of 10 to 16 % can be precipitated in one layer. The system is suitable for rack and drum galvanisation. The corrosion-resistance of the precipitated layers is far superior to traditional zinc-plating processes. It is free from hard complexing agents, only uses one power circuit, and thereby offers a significant advantage over many competitive processes.