Products
Galvanized blue and white passivator
Zn-98 high corrosion resistance trivalent chromium blue zinc water
Features:
1, passivation film color is bright, film formation is slow, delicate, good corrosion resistance.
2, the operation range is wide, the passivation time on the automatic line is 25-45 seconds, the pH can be controlled between 2.0-2.8.
3, the air stop time can be as long as 25-30 seconds, the hole or concave will not turn yellow, still keep bright blue.
4, The thickness of the zinc coating is > 8μm, and the resistance of NSS BBB> 72 hours.
5, this product can be used for acid zinc and alkali zinc, especially suitable for ring line, vertical lifting line and other automatic line on the large area of the workpiece passivation process.
Solution composition and operating conditions:
Operating range Manual rolling/hanging standard Automatic rolling/hanging standard
Zn-98 blue zinc water 25-75ml/L 40-60ml/L 25-50ml/L
PH 2.0-2.8 2.0-2.5 2.0-2.8
Temperature 20-30℃ 20-30℃ 20-30℃
Passivation time 20-45 seconds 20-35 seconds 20-35 seconds
Air stop 20-35 seconds 25-35 seconds 20-35 seconds
1. The control of passivation time depends on the customer's requirements for appearance color.
2. The solution can be put into production with pH ≈2.5-2.8 when the cylinder is opened (it can be determined by 0.5-5.0 precision pH test paper produced by Shanghai San Aisi).
3. The opening concentration of automatic line is 25-50ml/L, and the opening concentration of manual line is 40-60ml/L.
Process flow:
1, ZN-98 trivalent chromium blue zinc water concentration is high, before opening the cylinder stir evenly add (note).
2, The passivation process of Zn-98 trivalent chromium blue zinc is as follows:
Galvanizing → three times washing →HNO3 light washing →Zn-98 passivation → secondary washing → hot pure water immersion washing (70-80℃) → compressed air dehydration drying → drying (60-80℃,10-20 minutes)
Production maintenance and adjustment:
1, Deionized water is used to prepare passivation working fluid.
2, ZN-98 blue passivation solution concentration range is wide, from cylinder opening 25ml/L to 75ml/L can be applied, just adjust the passivation time can get the same appearance. When the temperature of the passivation working fluid is low, the passivation time is relatively prolonged, and vice versa.
3, Zn-98 trivalent chromium blue zinc water 1L can be treated 4000-8000dm2.
4, When the zinc concentration in the passivation solution reaches 8g/L, 20% of the passivation solution should be updated.
fault treatment:
|
Abnormal phenomenon |
the reason |
deal with |
|
Light color, not blue enough |
PH is too high Low temperature The concentration is too low „ Not enough passivation time … Bad mixing |
Add appropriate amount of HNO3 to adjust to the process range increase or room temperature so as to reach the groove 20 is deg.] C or more Add concentration to the process range „ Extend passivation time …To detect the circulation of the bath liquid and require sufficient flow of the bath liquid near the workpiece |
|
Too dark, yellowish appearance |
PH is too low The concentration of passivation solution is too high Passivation time is too long |
Increase the PH value (add appropriate amount of alkali) Add deionized water to dilute to the normal process range Shorten the immersion time of the workpiece |
|
Uneven color |
Poor mixing The concentration is too low PH is abnormal |
Improve mixing Adjust the concentration to the process range Use precision test paper to detect and adjust PH to the process range |
|
The hole is whitish or yellow |
PH is too low |
Increase the PH value to the process range |
|
The workpiece is foggy and dull |
PH is too low Incorrect concentration of passivation solution Poor plating of workpiece „ Too much impurities |
Adjust the PH value to the process range Analyze and adjust the concentration of the passivation solution to the process range Improve the plating process „ Discard part of the old bath and replace part of the new bath |
Matters needing attention:
1, the accumulation of excessive metal impurities in the passivation solution (such as Cu > 2mg/L, Zn BBB> /L, Fe BBB2 8>/ L, etc.) will make the workpiece surface yellow fog, corrosion resistance decline.
2, It is suitable for passivation on the automatic line of alkaline zinc plating and acid zinc plating layer process, and it is necessary to choose the appropriate zinc brightener to make the performance of passivation liquid give full play to.
FAQ
1. Q: Do you make the products yourself? Are you a trader or a manufacturer?
A: Yes, the products are produced by our company. Our company is a manufacturer focusing on the R&D and manufacturing of environmental protection electroplating additives. Our factory has 5000 square meters with an annual capacity of 15000 tons.
2. Q: Can your company send samples for trial?
A: We can provide samples for trial.
3. Q: What is the quality of your products?
A: Our company all products core raw materials is used by Germany BASF, American Dow Chemical and other international brand products. The production process is strictly in accordance with the ISO9001 quality management system, from the incoming inspection, product inspection, according to the strict inspection standard, ensure that every drop of products qualified. Product quality you can rest assured, like BYD, Huawei, Foxconn such enterprises are also using our products.
4. Q: How long is the shelf life of your products?
A: The shelf life of our products is two years. If you do not use up the products within a short time after you buy them, we suggest you store them in a cool place, not in the sun or in a high temperature environment.
5. Q: Are your products environmentally safe?
A: Our products have passed the SGS test and are recognized as "Green and Environment-friendly Promotion Products". Many auto parts and electronic products which use our products can pass the strict environmental protection test when they are exported to Europe and America. Therefore, we can be trusted in terms of environmental protection and safety.
6. Q: Can your company provide technical services?
A: Yes, our company has a technical service team of more than 10 people. The technical engineers all have more than 20 years' experience in electroplating factory. They can provide customers with comprehensive technical of pre-sales and after sales.
7. Q: Is it possible to visit your company?
A: Yes, of course. You are very welcome! We can meet you at Jieyang airport, If you can come to our city. Also you can visit our factory through live video.
8. Q: Can you customize products according to our needs?
A: Yes, our company has research and development strength, the product formula derived from Europe and the United States laboratory, European and American engineers technical support, work together with domestic universities. Our company has a member of Guangdong province expert enterprise workstation, Shantou university science and technology correspondent workstation, Jieyang city environmental protection e
