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Highlight
TR-138 trivalent chrome passivator
,multicolor chrome passivator
,post treatment chemicals with warranty
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ModelTrivalent Chromium Passivator
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AppearanceMulticolor
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UseZinc Plating
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TypePassivator For Zinc Plating
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Place of OriginCHINA
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Brand NameFENGFAN
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Model NumberTR-138
TR-138 Trivalent Chrome Multicolor Passivator
TR-138 Trivalent Chrome Multicolor Passivator
Properties
- Trivalent chrome passivation process without hexavalent and oxidizer, got SGS international certification.
- Apply to zinc and zinc alloy trivalent chrome multicolor passivation process, excellent anticorrosive property.
- Exceed the requirements of hexavalent multicolor passivation according to DIN 50 021 SS.
- Produce coatings of a clear, green, nearly like rainbow color.
- The passivation layer can also be dyed with organic colorings.
- Reduce the cost of disposing waste water due to trivalent solution, satisfy the environmental requirements for prohibiting hexavalent chrome passivator layer.
- Long service life, even with feed-back of rinse-water.
- Comply with American standard GME00252 and GMW-3011.
Process Flow
Plate zinc → Wash → Immerse Nitric Acid (0.5%) → Wash → Immerse TR-138→ Wash with cool water → Wash with hot deionized water → Dry
Operation and Application Indication
| Preparation | Range of operation | Best operation |
|---|---|---|
| TR-138 concentrate solution | 100-150ml/L | 125ml/L (Gravity: 1 ml = 1.425±0.02 g) |
| Wash | Deionized water | |
| Immersion time | 30-90 sec. | 60 sec. |
| Temp. | 10-40℃ | 25℃ |
| PH | 1.6-2.4 | 2.0 Adjust the PH with dilute nitric acid or 10% sodium hydroxide |
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