ZP 9134 S, was fespecially formulated without silver in order to create bright black - colored chromate layer on zinc-iron aalloy coatings in rack and barrel.
Iron percentage has to be between 0.3 - 0.8 % in order to have a bright black color.
Even passivation film layers color shows similiarity to conventional zinc chromate layer, it has higher corrosion resistance.
The temperature of zinc - iron plating bath has to be between 26 - 30 °C in order to obtain optimum results.
Iron percentage has to be between 0.3 - 0.8 % in order to have a bright black color.
Even passivation film layers color shows similiarity to conventional zinc chromate layer, it has higher corrosion resistance.
The temperature of zinc - iron plating bath has to be between 26 - 30 °C in order to obtain optimum results.