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TR-125
PostTime:2012/5/22 9:11:58    hit:1872
 

TR-125 Trivalent Chrome Multicolor Passivator

For Zinc and Zinc Alloy Plating

 

Properties

1.    Trivalent chrome passivator process without hexavalent and oxidizer, got SGS international certification

2.    Apply to zinc and zinc alloy trivalent chrome multicolor passivator process, excellent anticorrosive property

3.    Exceeds the requirements for hexavalent multicolor passivator according DIN 50 021 SS

4.    Produces coatings of a clear, green, slightly iridescent colour

5.    The passivation layer can also be dyed with organic colourings

6.    Reduce the cost of disposing waste water due to trivalent solution, satisfy the environmental requirements for prohibiting hexavalent chrome passivator layer

7.    Long service life, even with feed-back of rinse-water

8.    Comply with American GME00252 and GMW-3011

Process Sequence

Plate zinc Wash Immerse Nitric Acid Wash Immerse TR-125 Cool water wash Hot water wash

(remove ion-water) Dry

 

Operation and Application Indication

New solution make-up

Operation range

Best operation

TR-125

10 vol% - 15 vol%

12.5 vol%

ATTENTION: Fill in TR-125 first and then dilute with tap water up to the final volume (hot tap water is possible).

Wash(Before dry)          remove ion-water

Immersion time              30-90 seconds              60 seconds

Temp                              55-80                      60

pH                                  1.6-2.4                           2.0

Adjust with nitric acid or nahco3 (or Na2CO3)

 

Tank material: steel with heat resistant and acid resistant plastic inliner Heating: necessary, , out of acid resistance material (e.g. Teflon, glass) Agitation: rack or (low) air agitation

 

Consumption: For each liter of dragged out solution, 125 ml of TR-125 concentrate has to be added; best is a dosage of

TR-125 according to the throughput.

 

Hints: As last step before the passivation we recommend an acid dip in 0.5 Vol% nitric acid (conc.), especially for parts plated in alkaline electrolytes.

 
 
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