Forbrite chrome plating process was designed as a low concentration and ligh throw bath.
It provides a very wide bright plate range.
1. High current efficiency, 25% is attainable, low energy consumption.
2. Wide bright plate range.
3. Excellent covering power.
4. Addition of sulfuric acid is not required.
Ⅱ. Bath compositions and operating conditions :
|Chromic acid||190-210 g/l||200 g/l|
|Cr-A 5X||1- 2 ml/l||1.6 ml/l|
|Cr-B 5X||2.4-3.6 ml/l||3.0 ml/l|
|Current density||5-12 A/dm2||10 A/dm2|
For each kilogram new addition of chromic acid, 3ml/l of Cr-B 5X should be added.
In case of spots, yellow or gvey deposits, 0.4ml/l of Cr-A 5X should be