1. concentrated liquid
2. for trivalent chromium passivation of aluminum
3. Its anti-corrosion performance is superior to six valence chromium passivation.
4. can also be used for aluminum alloy and aluminum casting.
5. also can be used for the pretreatment of paint, powder coating and sizing processing.
6. It is easy to operate for immersion, spray, hand wipe.
7. formed a transparent, light colored coating.
8. low contact resistance, less than 0.8 mOhm/cm2.
9. can be resistant to the high temperature of 100 centigrade degree without detracting from its corrosion resistance ability
10. environmental protection, safe non-toxic, simple operation and wastewater treatment.
11. meet or exceed the MIL-DTL-81706 and MIL5541 corrosion standard (according to ASTMB-117 and DIN 50021 SS neutral salt spray test standard Quasi, more than 336 hours to appear white rust)
Technological process
Standard immersion technology
Aluminum alloy (silicon content <1%): alkaline degreasing → alkali erosion → descaling → immerse AL-100
Aluminum alloy (silicon content >1%): alkaline degreasing → cleaning → immerse AL-100
Standard spray process
Acidic degreasing → spray AL-100
Note:
1. The film with AL-100 treatment can be carried out immediately a coating process after drying. It is better for coating process to place 24 hours after passivation.
2. Maintenance: adjust the concentration and pH to the best state according to regular analysis.
3. Consumption: The consumption almost only depends on the carrying amount. Every 1m2 product (including carrying amount), need to add a concentrated solution of 15-25ml.
Operating instructions
AL-100 diluted with deionized water to make up: please clean thoroughly before making up, for the new channel and new production lines, cleaning with 10% sulfuric acid solution, then clean thoroughly with water, then add the measured AL-100 and deionized water, stirring evenly, measure the pH value, and adjust the pH value to 3.9.
| New solution Preparation | Technology process | Optimum range |
| AL-100 |
Spray (100-500ml/L) Immerse(100-500ml/L) |
250ml/L 200ml/L |
| Temp. | 30-40℃ | 40℃ |
| PH | 3.7-3.95 |
3.9 (adjust with 5% sulfuric acid solution or 1% sodium hydroxide solution) |
| Time |
30-60s (as coating pretreatment at 40℃) 1-3min (as corrosion treatment) |
1 minute
2 minutes |
|
1-4min (as coating pretreatment at 30℃) 2-6min (as corrosion treatment) |
2 minutes
4 minutes |
|
| Spray pressure | 0.5-1.5bar | 1bar |
| Stir | Not necessary | |
| Bath material | Stainless steel or with acid and fluoride resistant lining of steel | |
| Filter | Filter when necessary (at least 2 cycles per hour) | |
| Heating | Heat when necessary (Heating equipment should be acid and fluoride resistant) | |
| Cooling | Not necessary | |
| Exhaust device | Suggest to use for health of workers |
