Zinc Ammonium Chloride 25-30% — CHIMI FLUX Solution
ZnCl₂·2NH₄Cl (aq)
Zinc ammonium chloride solution is an aqueous galvanizing flux (ZnCl₂·2NH₄Cl) supplied ready to use at 25-30% active content. CHIMI FLUX Solution pre-treats steel before hot-dip galvanizing, prevents oxidation of prepared surfaces, and is also used in welding preparation and tin immersion. A clear liquid with a pH of 4.5-5.5, it is manufactured by CHIMI ART in Egypt and supplied in 200 L drums and 1000 L IBCs.
Product Overview
Zinc ammonium chloride solution is an aqueous galvanizing flux (ZnCl₂·2NH₄Cl) supplied ready to use at 25-30% active content. CHIMI FLUX Solution pre-treats steel before hot-dip galvanizing, prevents oxidation of prepared surfaces, and is also used in welding preparation and tin immersion. A clear liquid with a pH of 4.5-5.5, it is manufactured by CHIMI ART in Egypt and supplied in 200 L drums and 1000 L IBCs.
Technical Specifications
- Chemical Formula
- ZnCl₂·2NH₄Cl (aq)
- CAS Number
- 14639-97-5
- Appearance
- Clear liquid
- Concentration
- 25-30% active content
- pH Range
- 4.5-5.5
- Solubility
- Fully miscible with water
- Available Packaging
- 200L drums · 1000L IBC
- Shelf Life
- 12 months
- Storage Conditions
- Polyethylene containers
| Property | Value |
|---|---|
| Chemical Formula | ZnCl₂·2NH₄Cl (aq) |
| CAS Number | 14639-97-5 |
| Appearance | Clear liquid |
| Concentration | 25-30% active content |
| pH Range | 4.5-5.5 |
| Solubility | Fully miscible with water |
| Available Packaging | 200L drums · 1000L IBC |
| Shelf Life | 12 months |
| Storage Conditions | Polyethylene containers |
Applications
Dosing Guidelines
CHIMI FLUX Solution is supplied ready to use at 25-30% active content and can be applied by immersion or spray, or dosed into an existing flux bath to restore strength. The working concentration depends on the application: galvanizing pre-treatment typically runs stronger than welding preparation or tin immersion. Because lines differ in speed, steel condition and rinsing quality, establish the working strength through plant trials rather than a fixed figure, then hold it steady with routine density checks and volumetric top-up. Our technical team can help set a control range for your bath.
How It Works
The active double salt works exactly as in the powder grade: a film of zinc ammonium chloride dries onto the cleaned steel, dissolves residual oxides at dipping temperature, shields the surface from re-oxidation, and promotes fast, complete wetting by molten zinc so the coating forms evenly. Supplying the chemistry as a ready-made liquid changes the process control rather than the chemistry. Concentration is uniform throughout the container, so bath make-up and correction become simple volumetric additions instead of dissolving and mixing solid salt. The mildly acidic solution (pH 4.5-5.5) also gives a light final activation of the steel surface. In welding preparation the same film keeps joint areas oxide-free, and in tin immersion it wets the substrate so tin deposits uniformly.
Usage Tips
Store CHIMI FLUX Solution in closed polyethylene or other corrosion-resistant containers away from direct sunlight; the mildly acidic liquid attacks ordinary carbon steel, so keep it out of unlined metal tanks and fittings. Shelf life under correct storage is 12 months. Wear chemical-resistant gloves and goggles when handling, and ventilate enclosed dosing areas. If the solution cools and crystals appear, warm and stir gently to redissolve before use, and confirm strength by density measurement. Consult the SDS for full handling and first-aid guidance.
Certifications & Compliance
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Frequently Asked Questions
Can CHIMI FLUX Solution be used to maintain an existing flux bath?
Yes. Because the active content is uniform at 25-30%, the solution is convenient for correcting bath strength by simple volumetric addition: measure bath density, calculate the deficit, add solution and re-check. Many plants use powder for initial make-up and solution for running corrections.
Is the solution suitable for welding preparation and tin immersion?
Yes. The zinc ammonium chloride film keeps joint areas free of oxide during welding preparation, and in tin immersion it wets the substrate so tin deposits evenly. Working strength for these applications is normally lower than for galvanizing pre-treatment and should be set by trial.
What materials are suitable for storing and dosing the solution?
Polyethylene, polypropylene, FRP and other corrosion-resistant plastics are appropriate. The liquid is mildly acidic (pH 4.5-5.5) and will corrode unprotected carbon steel tanks, pipework and fittings, so avoid unlined metal in the storage and dosing circuit.
What is the shelf life of CHIMI FLUX Solution?
12 months when stored in closed polyethylene containers away from direct sunlight and extremes of temperature. If crystals form in cold conditions, warm and stir gently to redissolve, then verify strength by density measurement before returning the material to service.
How is CHIMI FLUX Solution packaged and delivered?
It is supplied in 200 L drums and 1000 L IBC containers, manufactured in Egypt by CHIMI ART. TDS and SDS documents are available on this page, and our sales team can advise on lead times and export shipment.
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