MX-5100H Decorative Trivalent
Black Chromium (yellow black) Plating
Features:
1. The process of chromium plating is
friendly-environment. The color of blue-black chromium alloy coating bears the
resemblance of dark gun above the bright nickel substrate.
2. Well-colored coating, Good adhesion of
coating, high coverage.
3. High corrosion and can endure for 72hours
in NSS test (neutral salt spray).
4. No harmful compound. Not likely to deposit
crystallization at low temperature, easy to control, Coating cohesion cannot be
affected by current interrupt.
5. Contain no hexavalent chromium, up to RHOS
standard, easy to deposit of waste water.
Plating
solution composition and operation condition:
Operation condition
|
Optimum value
|
Control scope
|
MX-5100 Hchromium salt
|
130g/l
|
120-150g/l
|
MX-5100 Hconductive salt
|
270g/l
|
250-300g/l
|
MX-5100 Hstabilizer
|
80ml/l
|
70-80 ml/l
|
MX-5100 Hwetting agent
|
3ml/l
|
2-5 ml/l
|
MX-5100 Hregulator
|
15ml/l
|
5-20ml/l
|
MX-5100 Hblackening agent
|
40 ml/l
|
20-60ml/l
|
Chromium metal (assay value)
|
22g/l
|
20-24g/l
|
PH value
|
2.8
|
2.5-3.2
|
Temperature
|
32℃
|
25-38℃
|
Proportion
|
25
|
22-26
|
Cathodic current density
|
20A/dm2
|
10-30A/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
|
0.12-0.3um/m
|
Exhaust fan
|
need
|
Hull cell test condition
|
8A, 90s, 32℃mixing, 85-90% ductility
|
