Chromium-Free VI Anti-Corrosion Solution With PreCoat A32
Aluminum is widely used in construction, automotive, electronics, and aerospace industries due to its lightweight and natural corrosion resistance. However, in marine, high-humidity, or industrial environments, aluminum surfaces still require additional protection through specialized surface treatment technologies. One of the most effective solutions currently available is passivation of aluminum using Chromium(III) technology .
This is why passivation technology for aluminum is widely used to increase corrosion resistance, improve paint adhesion, and extend product lifespan.
Today, with the trend toward phasing out Chromium(VI), Chromium VI-free aluminum passivation solutions are becoming the preferred choice for many businesses worldwide.
PreCoat A32 – High-Performance Chromium III Passivation Solution
PreCoat A32 is a passivation chemical line for aluminum based on Chromium(III) technology, developed to replace traditional Chromium(VI) systems in a wide range of industrial applications.
The product creates a transparent, uniform transformation layer that effectively protects aluminum surfaces under a variety of environmental conditions.
Advantages of aluminum passivation PreCoat A32
- Does not contain Chromium(VI).
- High corrosion resistance.
- Increases paint adhesion.
- Maintain surface electrical conductivity.
- Compatible with existing processing lines.
- Reduce environmental impact.
- Support in meeting international standards.
Corrosion Resistance of PreCoat A32
The conversion layer formed by PreCoat A32 helps protect the aluminum surface under a variety of operating conditions.
The product has been evaluated through standard corrosion tests such as:
- ASTM B117
- Qualicoat
- GSB
- MIL-DTL-81706B
- MIL-DTL-5541
Test results show superior corrosion resistance and suitability for a wide range of industrial applications requiring high durability.
Applications Of Aluminum PreCoat A32 Passivation Chemical
Automotive Industry
Protect aluminum components from corrosive environments and extend their lifespan.
Aerospace Industry
Meets stringent technical requirements for corrosion resistance and surface stability.
Electronics Industry
Maintain electrical conductivity while protecting the metal surface.
Construction And Architecture Industry
Applications include aluminum profiles, curtain walls, and outdoor structures.
Industrial Engineering
Protect aluminum components and equipment in harsh manufacturing environments.
Why Are Businesses Switching To Chromium-Free VI Technology?
Modern manufacturing trends are moving towards:
- Reduce emissions of hazardous chemicals.
- Comply with international environmental standards.
- Improve workplace safety.
- Simplify waste management procedures.
- Increase sustainability in production.
Chromium III passivation technology such as PreCoat A32 effectively meets these requirements while maintaining high corrosion resistance.
Comparison Of Cr(VI) And Cr(III) Technologies
For many years, chromium(VI)-containing chromate systems were widely used due to their high corrosion resistance. However, the current trend is shifting towards chromium(III) or chrome-free technologies.
Therefore, many manufacturers are switching to passivation solutions for Cr(III)-containing aluminum to meet modern technical and environmental requirements.
| Criteria | Chromium(VI) | Chromium(III) |
|---|---|---|
| Corrosion resistance | Very high | Very high |
| Paint adhesion | High | High |
| RoHS compliance | Are not | Have |
| Comply with REACH | Limit | Have |
| Environmental impact | High | Lower |
| Usage trends | Decreasing | A sharp increase |
Learn More
1. Surface Treatment Solutions Before Painting
PreCoat Z31 – a complete surface treatment system based on Chromium(III) technology , providing superior corrosion resistance and paint adhesion while being completely free of Chromium(VI). Specifically, using PreCoat Z31 will optimize paint performance and the long-term durability of the coating.
2. Spray Passivation Solution
The unique spray passivation solution allows for direct treatment on galvanized steel surfaces without the need for traditional dipping tanks. This technology offers high flexibility and easy integration into any galvanizing line without requiring major infrastructure changes.
3. Passivation for Hot-Dip Galvanizing – ADL-32
ADL-32 is a Chromium III (Cr3+) passivation chemical for hot-dip galvanized steel (HDG), used directly in the Quench Tank after the galvanizing process.
4. Passivation of Chrome III (Cr3+)
PrimeCoat® Z80x Series is a line of chemicals developed using Phosphate/Silane technology to provide high corrosion protection while meeting the trend of environmentally friendly production. PrimeCoat® Z80x is developed to replace passivation systems using Chromium VI (Cr⁶⁺), helping businesses transition to chrome-free technology while maintaining effective surface protection and corrosion resistance in a wide range of industrial applications.
5. Pre-treatment Chemicals
PrimeCoat® A109 is a water-based, chrome-free metal surface pretreatment chemical manufactured using advanced nanotechnology. It is an effective alternative to traditional chromate pretreatment systems, specifically developed for aluminum coils and cold-rolled steel. The product can replace traditional non-washing chromate pretreatment systems while still ensuring the necessary corrosion protection and adhesion to metal surfaces.
6. Specialized Information
We constantly update our articles and industry news to provide information that meets the needs of each customer.
| NEW ARTICLE |
Value Added From DK-CHEMICLAS
In addition to supplying AD CHEMICALS surface treatment chemicals , DK CHEMICALS also supports customers in optimizing production processes and improving line operational efficiency.
Key features include:
- In-depth technical consulting .
- Optimize production costs .
- Improve product quality.
- Reduce the error rate in production.
- Increase competitiveness in the market.
- Support the deployment of environmentally friendly technologies.
DK CHEMICALS ‘ team of experts has practical experience in continuous production lines, helping customers choose the most suitable solution for each type of material and specific technical requirement. Contact us for expert advice!
D.K. Chemicals Co., Ltd.
Address: 50 Street No. 12, Cityland Park Hills Residential Area, Go Vap Ward, Ho Chi Minh City
Hotline: 0909678599
Email: de@dk-chemicals.vn
