TVCB Black Trivalent Chrome Plating For Furnature & Decoration Accessory & Door Hindge

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