METASU YFB-NAA / NBA
Trivalent chromium black passivation for chloride bath
<Characteristics>
- Contains trivalent chromium and produces a more appealing black appearance compared to conventional agents.
- Ideal black passivation for zinc plating in chloride bath.
- Extended service life is achieved compared to conventional passivation agents.
- Corrosion resistance is greatly improved compared to conventional products, with a general corrosion resistance of SST192hr.
- Does not contain silver or dyes.
The benefits described above are results obtained at YUKEN, and performance in the customer environment should be verified separately.
Product Specifications
Attributes
| Appearance | Dark blue strongly acidic liquid (METASU YFB-NAA) Red strongly acidic liquid (METASU YFB-NBA) |
|---|
Bath makeup conditions
| Chemicals used | Usage range |
|---|---|
| METASU YFB-NAA | 20 – 60ml/L |
| METASU YFB-NBA | 60 – 100ml/L |
Usage conditions
| Item | Range | Remark |
|---|---|---|
| Process temperature | 30 – 50°C | |
| Process time | 40 – 90 seconds | |
| pH | 1.8 – 2.5 | Verify pH value before usage. Adjust using caustic soda or hydrochloric acid if the pH value falls outside of the specified range. ◎ The pH value must be adjusted to 2.2 during bath makeup. |
| Agitation | Yes | In the case of basket processing, use vibratory agitation. In the case of rack processing, use air agitation or vibratory agitation. |
Replenish conditions
| Chemicals used | Replenishment reference (standard) |
|---|---|
| METASU YFB-NAA | 5 – 20ml/100dm2 |
| METASU YFB-NBA | 40 – 80ml/100dm2 |
| Synthetic hydrochloric acid | pH adjustment |
Adjust the pH value to fall within the specified range.
Inquiry about the product
Feel free to contact us if you have any questions or matters to discuss.
