Passivation of Iron Phosphate According to Qualisteelcoat Standard
- Precipitation can be easily added to the final rinse tank using DI water.
- Improves corrosion resistance and paint adhesion.
PreCoat ADL-4P is a chromium (VI)-free passivation coating used to enhance the chemical treatment quality in traditional phosphate processes. The product is added in the final demi-coat bath , improving corrosion resistance and paint adhesion.
AD Chemicals – A Pioneer in Passivation Technology Innovation
AD Chemicals has built its reputation on innovation and continuous product improvement. The company has developed a wide range of additives for phosphate processes, based on chromium(III) and polymers . PreCoat ADL-4P is one of its outstanding innovations, making traditional phosphate processes more stable and efficient.
Precoat ADL-4P Passivation for Iron Phosphate Process
PreCoat is a chromium (III) -based passivation coating added to the final demi-coat bath of the phosphate line. The product creates a passivation layer on the metal surface, significantly improving adhesion and increasing corrosion resistance of the final product.
PreCoat is tested according to Qualisteelcoat standards and undergoes numerous laboratory tests on samples processed directly from customers’ production lines to demonstrate its superior effectiveness.
Laboratory testing – Passivation PreCoat ADL-4P
Test setup:
Sample panels with and without PreCoat were processed simultaneously on a spray-type iron phosphate line.
- 3 minutes of phosphate
- 3-minute rinse
- The rinsing tank used was relatively clean (conductivity 300 μS).
- Half of the samples were atomized with PreCoat ADL-4P solution.
- All the samples were then painted.
- Next is a 500-hour salt spray test (ASTM B117) – meeting Qualisteelcoat standards.
Result:
Expert advice on phosphate
Setting up a dipping/spraying line
A typical phosphate line usually includes 7 treatment tanks . The illustration below shows the addition of Passivation ADL-4P.
The product can also be added to the final rinsing tank of a 3-step phosphate process .
Suitable for both dip and spray lines .
PreCoat ADL-4P – A Smart Upgrade Solution to Replace Traditional Phosphates
When combined with Cleaner Neutral , PreCoat ADL-4P is an excellent alternative to the traditional phosphate process.
This chromium (VI)-free passivation is added to the final demi-coating step , providing:
- Superior corrosion resistance
- Better paint adhesion
- Increase the efficiency and sustainability of the production line.
- Complies with standards such as Qualisteelcoat
Even existing phosphate lines can be upgraded with PreCoat ADL-4P to improve overall quality.
Exceeding Market Standards
With PreCoat ADL-4P, AD Chemicals demonstrates that traditional standards for phosphate processes can be upgraded to a new level .
The product is both economical and delivers superior quality , suitable for most current phosphate lines.
Learn More
1. Chemicals for the Coiled Steel Industry .
2. Pre-treatment Chemicals
3. Chemicals for Hot-Dip Galvanizing (HDG)
4. Specialized Information
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DK-Chemicals: Metal surface pretreatment solutions for industry
DK-Chemicals provides chemical surface treatment solutions for metals serving the aluminum, galvanized sheet, color-coated steel, coil-coating, and related industrial applications.
With a focus on providing advanced, environmentally friendly technologies that meet modern production requirements, DK-Chemicals partners with customers in selecting suitable pre-treatment solutions, optimizing surface quality, and enhancing product durability after coating.
Contact DK Chemicals’ technical team today for detailed advice on Iron.
Contact DK Chemicals’ technical team today for detailed advice .
DK Chemical Company Limited
Address: 50 Street No. 12, Cityland Park Hills Residential Area, Go Vap Ward, Ho Chi Minh City
Hotline: 0909678599
