HN-09 Hexavalent Black Chromium Plating Process
Commodity Name
HN-09 Hexavalent Black Chromium Plating Process
Composition and Working Conditions
|
Bath Solution Composition
and Working Conditions
|
Application
|
Standard Make- up
|
|
Chromium trioxide
|
300~400 g/L
|
350g/L
|
|
HN-09 A Blackening solution
|
70~100 mL/L
|
80mL/L
|
|
HN-09B Stabilizer
|
30~40 g/L
|
35g/L
|
|
HN-09 Carrier
|
10~15 mL/L
|
12mL/L
|
|
Specific gravity
|
27~33°Bé
|
30°Bé
|
|
Temperature
|
20-40 ℃
|
30℃
|
|
Current density of cathode
|
30~60 A/dm2
|
40 A/dm2
|
|
Anode
|
Lead-antimony-tin alloy
|
|
Agitation
|
Medium air agitation
|
|
Filtration
|
Need
|
|
Heating and cooling
equipment
|
Need
|
Application and Advantage
1. Adopt
solubility and mixed catalyst, easy to operate.
2. Even
and esthetic coating with good covering power and dispersive ability.
3. Adopt
lead-tin-antimony anode, which can improve the quality of chromium layer and
the stability of plating solution.
4. Good
corrosion resistance and high-temperature resistance, even when the temperature rises to about 500℃, the black chromium layer won’t change color
and get crisp, has good thermostability.
5. Be
widely used in protective decorative chromium layer which works for decreasing reflectance
or used in functional layer which has special demand, such as the applications
in the area of light industry, instrument, aerospace.