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Kemphos-329(Accelerator Heavy Zinc Phosphating Chemical)
(Accelerator Heavy Zinc
Phosphating Chemical)
Product Description
Kemphos-329 is an accelerated Zinc Phosphating process, which is
specially formulated to produce medium to heavy weight coating on
Iron and Steel surfaces by Hot Immersion method. Kemphos-329 is
recommended for a wide range of ferrous metal articles such as car
accessories, metal cores, forge and cast iron components, small
weight coating gives a very good
Product
Specifications
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a.
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Colour
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Light Green Liquid
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b.
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Chemical Composition
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Blend of phosphates, nitrates, zinc, nickel,
activators etc.
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c.
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Odour
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Slightly Pungent
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d.
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Foaming Tendency
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Nil
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e.
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Reliability
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Good
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f.
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Handling
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Avoid Skin Contact
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g.
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Solubility
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Good
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h.
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pH
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Acidic Range
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I.
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Toxicity
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Nil
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j.
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Flash Point
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Nil
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k.
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Pollution Hazard
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Moderate
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Product Operating Data
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Concentration
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2.5 litres to 5 litres o Kemphos-329 100 litres
of bath.
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Pointage
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40 - 45 ml. (depends on the concentration)
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Iron Content
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0.05-0.4%
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Temperature
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80 - 90°C
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Immersion
a) For Medium Weight Coating
b) For Heavy weight Coating
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3 5 minutes
20 -40 minutes
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Product Operating Procedure
The articles to be processed in the
Kemphos-329 solution should be free from oils, greases, dirts, rust
and scales etc.
Degreasing
Remove all oils and greases by Emulsion cleaning, or
Trichloroethylene vapour degreasing or by solvent wiping. Thorough
rinsing should be followed. Wherever necessary after degreasing.
Derusting
Remove rust and scale's present on the articles to be processed by
immersion in Kemklin HD. If scale are heavy the articles should
beyond by shot blasting or by pickling. After pickling rinsing should
be carried out in two stages.
Phosphating
Immerse the components in Kemphos-329 bath for 5 to 40 minutes at
80-85 dg. C
temperature. Immersion time depends on the type of coating weight
required. Medium weight coating can be produced by immersion for 3
5 minutes which serves a good base for under gloss pains heavier
coatings with kemphos-329 can be obtained by Immersion for 20 -40
minutes which increase corrosion resistance. Rinse the phosphated
articles in cold running water followed by hot water rinse to
accelerate drying.
Passivation
Articles should be passivated by immersion in Hot Kemlyte-333
solution at 70°C for 30 seconds to 1 minute.
Drying
After passivation the articles should be dried immediately drying can
be done inside a hot air circulating oven or by means of compressed
air.
Fill the tank 2/3 with water and add 2.5 to 5 liters of Kemphos-329
per 100 litres. Fill the bath upto its operating level and stir the
solution thoroughly.
Heat the bath to 70°C and add few kgs. Of degreased iron scrap or
steel wool. After 15-20 minutes when the gassing has been ceased,
remove the metal and check iron percentage. Ferrous Iron
concentration should be 0.05% minimum. Otherwise repeat the
operation.
Adjust the pointage of bath to working condition by adding
(Kemphos-329). Heat the bath to the operating temperature Kemphos-329
bath can be easily controlled within the operating temperature
Kemphos-329 bath can be easily controlled within the operating limits
by simple titration and maintained by periodic additions of
Kemphos-329.
Phosphate coating alone do not protect the rusting for long period
and required sealing with paint, stain or oil immediately after
coating which provides long term protection.
Product Application Equipment
Kemphos-329 tank should be
fabricated with 3 to 4 mm thick M.S. Plates with continuous
convection current hating system.
Testing and Control Procedure
Total
Acidity
Pipette out 10 ml. Of the bath
solution in a clean 100 ml beaker or conical flask and 2 to 3 drops
of indicator Phenolphthalein and titrate against N/10 NaOH solution
to a pink point. The number of Mis required represent the total acid
pointage. Bath pointage should be maintained between 28 to 32 ml. Add
125 ml. Of Kemphos-329 per 100 lits of bath for each pointage below
30.
Ferrous
Ion Concentration
Pipette out 10 ml. Of bath solution
in 150 conical flask. Add 2 ml or 50% H2SO4 and titrate with N/10
kmNO4 (3.16 gms/ltr) solution to pink persisting for 15 seconds.
Multiply by the titration reading with 0.056, ti get percentage of
ferrous Ions in the bath.
Chemical Replenishment
Restore the bath to the working level by adding water to makeup
evaporation loss and drag out losses. Check the Kemphos-329 pointage.
Safety Measures
Kemphose-329 is an acidic liquid
material, and while handling proper care should be taken. Protect
eyes and skin by means of goggles, aprons, gloves etc. If it comes into
contact with skin and eyes, wash thoroughly with a flush of water and
get medical advice.
General Information
Corrosion Resistance:
Excellent.
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