HEXAVALENT PASSIVATIONS
| Process | Compositions& Operating Conditions | Applications & Features | |
| BLUE -DIP BL - 115 |
Concentration Nitric Acid (tech.) Time |
3-4 g/l 15-18 ml/l 5-15 sec. |
Produces brilliant blue bright conversion coating on zinc and provides excellent corrosion resistance. With SST of 24 hrs. |
| BLUE -DIP BL - 65 |
Concentration Nitric Acid (tech.) Time |
4-5 g/l 15-18 ml/l 5-15 sec. |
Produces blue color conversion coating. It's a low cost passivation. With SST of 24 hrs. |
| GREEN DIP - 198 | Concentration Time |
50-100 ml/l 20-30 sec. |
Dark military green colour protect- -ive coating on zinc plated articles. With SST upto 96 hrs. |
| LIGHT OLIVE GREEN - 101 | Concentration Time |
50-100 ml/l 20-30 sec. |
Light olive green colour protective coating on zinc plated articles. With SST upto 96 hrs. |
| YELLOW DIP - 195 | Concentration Temperature Time |
20-30 ml/l Room 20-30 sec. |
Gives yellow iridescent chromate layer. With SST upto 48 hrs. |
| YELLOW DIP - 295 | Concentration Nitric Acid Temperature Time |
12-15 ml/l 2.5- 3 ml/l Room 20-30 sec. |
Gives yellow iridescent chromate layer. With SST upto 72 hrs. |
| YELLOW DIP - 595 | Concentration Nitric Acid Temperature Time |
8-10 ml/l 2.5- 3 ml/l Room 20-30 sec. |
Gives yellow iridescent chromate layer. With SST upto 72 hrs. |
| BLACK PASSIVATION 280 |
Concentration 280-A Conc. 280-B Temperature Time |
60-80 ml/l 100-120 ml/l 25-35°C 20-30 sec. |
Gives a dark black coloured hexavalent- passivation with S.S.T. of more than 96 hrs. |
| HEXVALENT BLACK | HEXVALENT BLACK 178A HEXVALENT BLACK 178B Temperature Time |
70-80 ml/l 100-120 ml/l 30-40 °C 15-20 sec. |
Produces black conversion coating on zinc plated articles with S.S.T of more than 72 hours. |
TRIVALENT PASSIVATIONS
| Process | Compositions& Operating Conditions | Applications & Features | |
| TRIVALENT PASSIVATIONS TC-461 |
Concentration Temperature pH Time |
80-100 ml/l 25-35°C 2 - 2.2 20-25 sec. |
Gives a light - blue trivalent chromate passivation with S.S.T of more than 48 hrs. |
| TRIVALENT EXTRA BLUE TC-462 |
Concentration Temperature pH Time |
50-100 ml/l 25-35°C 2 - 2.2 25-30 sec. |
Gives a Dark - blue trivalent chromate passivation with S.S.T of more than 72 hrs. |
| TRIVALENT BLUE BL-7500 | Concentration Temperature pH Time |
25-40 ml/l 25-30°C 1.8 - 2.0 20-30 sec. |
Gives a more bluish purple finish with a good salt spray life can be used online without disturbing the PH meters. |
| BLUE PASS NT-188 | Concentration | 4-5 ml/l | A dye based post dip after passivation to enhance the blue color. |
| THICK LAYER TRICON P.G. - 3100 |
Concentration Temperature pH Time |
80-120 ml/l 30-50°C 1.8-2.2 40-60 sec. |
Gives a very good iridescent finish green colour with a very good salt spray life of more than 96 hours. |
| THICK LAYER TRICON YELLOW S.V. - 3800 |
Concentration Temperature pH Time |
80-120 ml/l 30-50°C 1.8-2.2 40-60 sec. |
Gives a very good iridescent yellow with pink colour with a good salt spray life of upto 120 hours. |
| TRIVALENT BLACK PAS. 1500 FOR ACID & ALKALINE ZINC PLATED PARTS |
Concentration 1500-A Concentration 1500-B Temperature pH Time |
60-80 ml/l 60-80 ml/l 25-30°C 1.6-1.8 30-60 sec. |
Gives a black coloured trivalent passivation on acid & alkaline zinc plated parts. Black sealer or top coat is must to enchance the color and SST life. |
| TRIVALENT BLACK (ALK.) 1900 |
Concentration 1900-A Concentration 1900-B Temperature pH Time |
50-60 ml/l 40-80 ml/l 20-30°C 2.1-2.6 20-60 sec. |
Gives a uniform black trivalent passivation on alkaline zinc rack or barrel plated parts. A clear top coat or a black sealer is must to enhance the colour adhesion and improve the SST. |
| TRIVALENT SILVER PASSIVATION TS-1200 |
Concentration Temperature pH Time |
80-100 ml/l 30-50°C 1.8-3.0 40-60 sec |
Gives an silver coloured trivalent passivation on zinc alloy platings with SSTof more than 96 hrs. |
| TRIVALENT BLACK PASSIVATION ON ZINC NICKEL ALLOY PLATINGS 2900 |
Concentration 2900 Temperature pH Time |
80-120 ml/l 20-30°C 1.6-1.9 40-90 sec. |
Gives a uniform black trivalent passivation on alkaline zinc nickel (nickel 12-14%) on rack and barrel parts. A clear or black top coat is must to enhnce colour adhesion and improve SST. |
| THICK LAYER TRICHROME LC-860 |
Concentration Temperature pH Time |
100-150 ml/l 40-60°C 1.8-2.2 60 sec. |
Gives an iridescent coloured trivalent passivation with SST of more than 200 hrs |
| YELLOW TRIVALENT 652 WITH COLOR BOOSTER |
Concentration 652-A brass colour use 652-B For golden colour use 652-C Temperature pH Time |
80-100 ml/l 10-20 ml/l 10-20 ml/l 30-40°C 1.8-2.2 30-60 sec. |
Gives a yellow coloured trivalent passivation, similar to hexavalent. yellow, SST life can be enhanced with top coats. |
| THICK LAYER TRANSPARENT ON ZINC NICKEL ALLOY 2500 |
Concentration Temperature Time pH Adjusted with dilute hcl or NAOH pre dip should 1% HCL only |
100-120 ml/l 20-25°C 45-90 sec. 2.5-3.5 |
Gives a transparent silver white colour on Zinc/NICKEL alloy platings with S.S.T of up to 200 hours with a topcoat. |
| Trivalent Yellow Passivation KT-150 | Concentration Temperature Time pH |
80-120 ml/l 30-50°C 20-40 sec. 1.8-2.2 |
Gives a very good iridescent pinkish white colour on both acidic and alkaline zinc plated parts |
| Trivalent Thick Layer KT-190 | Concentration Temperature Time pH |
80-120 ml/l 30-50°C 30-60 sec. 1.8-2.2 |
Gives a very good iridescent pinkish yellow colour on both acidic and alkaline zinc plated parts |