Dragon Flux
Dragon Flux Brochure
DOUBLE SALT FLUX FOR HOT DIP GALVANIZING INDUSTRY
Fluxing is the final cleaning and preparation process before the materials are galvanized.
The purpose of fluxing is to provide further and final cleaning of the steel until the moment that it enters the molten zinc.
Remember “If it is not clean, it cannot be galvanized.”
Fluxing also provide a temporary corrosion protection in order to prevent any further formation of rust on the articles e.g., ‘Flash rusting’.
There is a waiting period between fluxing and galvanizing during the drying, where flux protects the cleaned steel.
DRAGON FLUX is a double salts flux of ZnCl₂ 2 NH₄Cl
The solution consists of a mixture of two chemical compounds, each being compounds of two elements, namely: 56% Zinc Chloride (ZnCl₂) and 44% Ammonium Chloride (NH₄Cl)
These two compounds are mixed in water to form a product called Zinc Ammonium Chloride.
Advantages of DRAGON FLUX
- Prevents oxidation of steel after pretreatment until galvanizing
- Removes the fine rust layer remaining on the surface of the material after pickling
- Reduces zinc consumption
- Reduces zinc ash formation
- Decreases zinc dross formation
- Reduces coating thickness
- Plays an effective role in obtaining homogeneous coating
- Increases process speed
- Prevents the formation of coating defects
- Increases quality
Technical Characteristics
Technical CharacteristicsGeneral Description
Appearance: Small or large crystals
Chemical formulation : ZnCl₂ 2 NH₄Cl
Molecular weight : 243,29
pH in solution : 4-5
Chemical Composition
ZnCl₂ : 54 – 56,5 %
NH₄Cl : 41 – 44 %
Working ParameterspH : 3-4
Temperature : 50ᵒC
Process time : 2-3 minutes
Total salt concentration : 400-550 g/liter
Iron concentration (Fe+2) : max 5 g/liter
Maintenance of the DRAGON FLUX Solution
Dragon Flux consumption takes place in the following ways:
- By reaction of the chemical and steel surface
- By drag out of the articles
Consumption of the product is approximately 1.2 kg/t of galvanized material and depends on the surface area of the articles.
Additions have to be made according to the ton of galvanized steel, weekly or twice a week, depending on the quantity galvanized.
Monthly analysis will help to maintain the flux solution in the desired concentration and composition.
Removal of Fe+2
Fe+2 in the flux solution has to be kept at the minimum possible value, close to ‘0’, or less than 3gr/lt. After 5 gr/liter Fe+2, the increase in dross will be significant.
By controlling the amount of Fe+2, you can control your dross amount, ash amount and splashes in the zinc bath.
Please contact ANI METAL for our Flux Treatment System if you need any help in removal of Fe+2 from flux solution.
