Black Trivalent Chrome Plating For Furnature Chair & Door Hindge Environmental process not contain hexavalent chrome. Quality
Black Trivalent Chrome Plating For Furnature Chair and Door Hindge and Decoration accessories
Operation Instruction
TVCB trivalent chromium Black Cr-technology not only can meet the need of chromate
procedure but also can meet the requirement for environmental safety.
Trivalent chromium black Cr-plating technology has the characteristics as follow:
This process can eliminate the emission of toxic hexvalvalent chromium from the plating
factory. It can tolerate the block of current, has a good even-plating ability, improve the covering
capacity, reduce the burning situation on high current density area.
This process uses graphite as the anode, and has long life, no pollution, no lead.
The sensitivity of metal ions impurities, which is in the bath, can be removed by ion-exchange device,
1.baths composition:
Materials range best
TVC-CC chromium salt 115-130g/l 120g/l
TVCB conducting salt 290-305g/l 300g/l)
TVC-CAT stabilizer 50-70ml/l 60ml/l
TVC-MS wetting agent 6-8ml/l 6ml/l
TVC-EXT complexing agent 1-2ml/l 1ml/l
TVCB black chromium 1# 20-30ml/l 20ml/l
TVCB black chromium 3# 25-30ml/l 25ml/l
Trivalent chromium 20-24g/l 22g/l
pH value 2.5-3.0 2.6
temperature 30-38°C 32°C
proportion 1.20-1.21(32°C) 1.20(32°C)
cathode current density 8-20A/dm2 13A/dm2
anode current density 3.25-5.5A/dm2 4.25 A/dm2
andoe special graphite anode
filtration continous filtering
agitate medium grade mechanical agitate or air agitate
heat pure titanium heater
Application:
Black Trivalent Chrome Plating are widely applied in the industries of furnature and decoration accessories and constructural hardware like door hindge.
TVCB Black Trivalent Chrome Plating For Furnature & Decoration Accessory & Door Hindge
