MX-3100B Decorative trivalent white chromium plating
additive
Feature:
1. The process of
chromium plating is friendly-environment, blue-black chromium alloy coating can
be acquired above the bright nickel base.
2. Well-colored
coating, Good adhesion of coating, high coverage.
3. High corrosion
resistance and strong hardness, reach
more than 96 hours in NSS (neutral salt spray ) test and 40 hours in CASS(salt
spray ) test
4 . No harmful
compound. High tolerance for sulfate radical ion and chloride ion, easy to
control,
5. Contain no
hexavalent chromium, cohesion cannot be affected by current interrupt, easy to
deposit of waste water.
6. Excellent
process stability, fast deposition, high current efficiency, thus energy
consumption can be greatly reduced.
Plating
solution composition and operation condition:
composition
|
optimum value
|
control scope
|
MX-3100 Bchromium salt
|
130g/l
|
120-150g/l
|
MX-3100 Bconductive salt
|
270g/l
|
250-300g/l
|
MX-3100 Bstabilizer
|
75ml/l
|
70-80 ml/l
|
MX-3100 Bwetting agent
|
3ml/l
|
2-5 ml/l
|
MX-3100 Bregulator
|
3ml/l
|
2-4ml/l
|
chromium metal (assay value)
|
22g/kl
|
20-24 g/kl
|
PH value
|
2.7-3.0
|
2.5-3.5
|
temperature
|
30℃
|
25-35℃
|
proportion
|
25
|
22-26
|
cathodic current density
|
12A/dm2
|
8-20A/dm2
|
Anode material
|
special graphite anode
|
filter
|
continuous filtration
|
mixing
|
moderate machinery or air mixing
|
heat/cool
|
titanium, iron teflon heating pipe or cold water pipe
|
anode area: cathode area
|
1.5-2: 1
|
deposition rate
|
0.16-0.3um/m
|
exhaust fan
|
need
|
hull cell test condition
|
8A, 60s, 30℃ mixing, 85% ductility
|
