集团风采

Advantages

Bath Composition and Working Conditions

Make up the solution

Equipments

Functions and addition of the brighteners

　● Bright layer with good ductility；
　● Solution with good dispersibility and excellent leveling；
　● Layer without pinholes but with terrific corrosion resistance；
　● Stable solution easy to control with a low maintenance cost；
　● Applicable for iron steel, zinc alloy die-cast and plastic. Through necessary preliminary finish (such as basic copper) ，it can
be used as a economical, practical and bright interlayer. ml/1000Ah

Bath composition & technical data	Application	Standard
cupric sulphate 　　　　　bright nickel sulfide 　　　　　chloride ion	190-240　g/l 　　　　50-70　　g/l 　　　　70-140　 g/l	220 　g/l 　　　60　　g/l 　　　120 　g/l
opening agent　HN-310 　　　　　brightener　HN-310A 　　　　　brightener　HN-310B	8-12 　　ml/l 　　　　0.4-0.6　ml/l 　　　　0.4-0.6　ml/l	10　ml/l 　　　0.5 ml/l 　　　0.5 ml/l
Temperature 　　　　　cathodic current density 　　　　　anodic current density 　　　　　anode 　　　　　voltage 　　　　　mixture	20-35。C 　　　　1-6A/dm² 　　　　0.5-2.5A/dm² 　　　　phosphatic copper（0.03-00.6% phosphorus) 　　　　1.5-6v 　　　　air or mechanical stirring	55-60。C 　　　3-5A/dm² 　　　0.5-2.5A/dm² 　　　phosphatic copper（0.03-00.6% phosphorus) 　　　1.5-6v 　　　air stirring

●　Fill up two-third of the preparatory tank with water, and heat it up to 40-50。C； the chloride ion content in the water shall be lower than 70mg/l. Add necessary cupric sulphate, and mix it up until completely dissolved.
●　Add some active carbon at the ratio of 2g/l and mix them up for over one hour, then filter the solution into a clean tank； add water to the approximate water level.
●　Add necessary bright vitriol and mix them up strongly to keep the solution temperature below 60。C.
●　Cool the solution to 25。C； according to the chloride ion content in the solution, add hydrochloric acid or sodium chloride correspondently to increase the chloride ion content.
●　Add the above additives and apply electrolysis
with 0.5A/dm2 current for about 2 hours, then begin the plating.
●　Tank：　　PVC-lined steel tank or other plastic-lined steel tanks, or plastic tank
●　Cooling apparatus： under too high temperature, the brightener consumption will be increased and the LCD brightness will be lowed down, when proper cooling apparatuses are necessary.
●　Circulating filtration： the sestons in the solution, such as dust, grease, etc., will lead to rough layer, pinhole or low brightness； it is advisable to apply continuous circulating filtration, when the filtration pump can filter the solution for min. four times within one hour.

Opening agent HN-310：　　　the shortage of it will lead to a loose striated layer in the high/ medium current area； the over capacity of it will lead to a nepheloid layer in the LCD.
Brightener HN-310A：　　　 the shortage of it will lead to a lower layer leveling in the whole current density area； the over capacity of it will lead to a sudden leveling weakness in the LCD as a well-marked demarvation.
Brightener HN-310B：　　　the shortage of it will lead to the burning of the layer； the over capacity of it will lead to serious fogging in the current area.
The function and influence of chloride ion： the chloride ion plays a very important role in the bright acid copper plating. Sufficient chloride ion helps the additive in the plating of compact, bright and smooth layer. The over capacity of it will result in a marked falling of the layer brightness and leveling, and a hoary film on the anode surface to lead to inactivation.

●　When the solution problem cannot be solved with none of the above additives, please check the chloride ion content！

HN-310 brightener consumption: 　　　　 HN-310A： 30-90ml/1000Ah
　　　　　　　　　　　　　　　　HN-310B： 30-90ml/1000Ah