Features
AL200 is suitable for passivation treatment of aluminum, which can form a titanium-zirconium composite conversion film on aluminum substrate and has good corrosion resistance.
- Nickel-free and chromium-free process;
- It can be used for pretreatment of liquid coating, powder coating, sizing, etc., and can replace trivalent chromium or hexavalent chromium processes;
- Passivation speed is fast, and it is not easy discoloring;
- Used for pretreatment of painting: greatly improve the binding force of printing or painting.
The film layer is colorless and transparent, which does not affect the appearance of the workpiece.
Working conditions
| Item |
Standard |
Optimal |
| AL-200 |
10~25g/L |
15g/L |
| Temperature |
20~35℃ |
25~30℃ |
| Pure water conductance |
≤30μs/cm |
≤15μs/cm |
| Processing time |
1~5min |
3min |
| pH |
4.0 ~ 5.0 |
4.0 ~ 5.0 |
| Air stirring |
Not recommended |
Not recommended |
| Circulating filtration |
Recommended use |
Recommended use |
Use Scenarios
Surface Pretreatment Before Coating or Painting
AL‑200 can be applied on aluminum parts that will subsequently receive paint, powder coat, or adhesive bonding. In these cases, providing a stable passivated surface reduces underfilm corrosion, improves adhesion, and extends service life. For factories or shops offering aluminum anodizing service, using AL‑200 as pretreatment helps ensure that anodized layers or subsequent coatings adhere well and last longer. Parts produced with aluminum anodizing kits in small or medium batches also benefit from this passivation step to maintain consistency.
Applications in Outdoor or Corrosive Environments
Equipment, enclosures, architectural fixtures, or signage made of aluminum exposed to weather, humidity, or coastal atmospheres can benefit from AL‑200. The chromium‑free passivation film helps protect such anodized aluminum or aluminum alloy parts from corrosion that would otherwise degrade surface finish or structural integrity over time. For manufacturers supplying parts into marine, automotive, or infrastructure projects, AL‑200 offers protective performance without regulatory drawbacks associated with traditional alodine coating methods.
Use in Mixed‑Alloy or Die Casting Production
Die casting aluminum often includes varied alloying elements and may have porosity or non‑uniform surface finish. AL‑200 is suitable for such substrates because it is designed for both aluminum and aluminum alloy, including die castings. Workshop operations that combine die cast, extrusion, or sheet aluminum components can standardize on AL‑200 for passivation, aligning with aluminum anodizing process workflows. This reduces complexity in chemical inventory and helps maintain corrosion protection across different substrate types.
About Us
Wuhan Fengfan International Trade Co., Ltd. is a wholly owned subsidiary of Wuhan Fengfan Electrochemical Technology Co., Ltd., founded in 1984.
Fengfan is specialized in development, production, and export of metal surface finishing chemicals, including electroplating agents, pretreatment chemicals, anodizing chemicals, and conversion coatings. It serves both domestic and international markets, providing support for aluminum anodizing service and related industries.
The company’s facilities include R&D laboratories, pilot electroplating and anodization trial units, and full‑scale production lines. Fengfan has capacity to produce thousands of tons annually of surface treatment additives.
Its product offerings include chromium‑free passivators like AL‑200, trivalent chromium products, and other agents used in anodizing aluminum process or applications that require anodized aluminum surface treatments.
FAQ
What does “chromium‑free passivator” mean for AL‑200?
It means AL‑200 does not use hexavalent chromium in its formulation, offering protective film formation that avoids environmental and regulatory issues tied to traditional alodine coating processes.
Is AL‑200 effective in salt spray tests?
Yes. AL‑200 improves neutral salt spray resistance on aluminum and aluminum alloy surfaces, based on performance data shared in promotional materials.
Can AL‑200 be used before anodizing?
Yes. It is suited for use in pretreatment workflows prior to anodizing, as part of aluminum anodizing service or anodizing aluminum process to enhance corrosion resistance and surface readiness.
Which aluminum substrates are compatible with AL‑200?
Both aluminum alloys and die cast aluminum are mentioned as compatible substrates for AL‑200.
Does AL‑200 affect the appearance of aluminum?
The product is described as forming a conversion film that maintains the metal’s original look without discoloration or residue.
Order AL‑200 now to upgrade your aluminum anodizing service with chromium‑free protection and reliable corrosion resistance!
