MX-Zn-D-31L Zinc plating trivalent chromium blue
passivation
Features:
1. It belongs to environmental protection series,
high corrosion-resistant passivation, up to RoHS request, no hexavalent
involved;
2. Easy to operate,
brightly and evenly colored, great brightness;
3. Great corrosion
resistance, 8μm zinc plating could reach more than 72 hours in NSS(neutral salt
spray ) test;
4. Applicable to all
post-processing of zinc plating;
Process
and operation condition
|
|
scope
|
Recommended value
|
|
MX-Zn-D-31L
|
40—70ml/L
|
Barrel plating 70ml/L; rack
plating 50ml/L
|
|
PH value
|
2.2—2.8
|
Barrel plating 2.3; rack
plating 2.5
|
|
Temperature
|
18—35℃
|
25℃
|
|
Passivation time
|
10-30s
|
16s
|
|
Mixing
|
Air mixing
|
Air mixing
|
Maintenance
MX-Zn-D-31L replenishment
is in proportion to the treatment area
Add 1LMX-Zn-D-31L every
time dealing with 2000dm2of plating pieces, there is
discrepancy according to product requirement and input;
As for barrel plating,
input is large, increase MX-Zn-D-31L replenishment properly to keep passivation
concentrate on pH value 2.2-2.8 and
guarantee products’ corrosion resistance.
