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Kemphos
330(c)
(Zinc
Phosphating Chemical operated at Room Temperature)
Product
Description
Kemphos-330(c) is an accelerated cold Immersion phosphating process,
which produces light to medium weight phosphate coating on iron and
steel surfaces. The coating produced by Kemphos-330(c) serves as an
excellent base for paint and coating formed after surface condition
with our (Activator-Kemphos-338), is of fine crystalline structure
and gives good gloss to the paint.
Kemphos-330(c) phosphating process gives medium weight coating and
protects. Iron and steel surfaces against rusting.
Kemphos-330(c) meets to the requirements of IS:3618:1966 class B/C
and WPN/GEN/3 class II/III accelerated processes.
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, 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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Dip
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Concentration
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2.5%
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Time
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5 20 minutes
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Temperature
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R. T.
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Total Acidity
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18-22 ml
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Free Acidity
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1 1.5 ml
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Accelerator-002
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3 ml
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Product
Operating Procedure
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Degreasing
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Water Rinsing
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Derusting (Kemlin)
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Water Rinsing
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Activator (Kemphos-338)
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Phosphating (Kemphos-330(c))
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Water Rinsing
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Passivation (Kemlyte-333)
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Drying
Product
Application Equipments
Kemphos-330(c) tank should be fabricated with 3 to 4 mm thick M.S.
Plates with continuous current hating system.
Testing
and control Procedure
Total
Acidity
Pipette out 10 ml. of bath solution in a conical flask. Add a few
drops of Indicator Phenolphthalein. Titrate with N/10 sodium
Hydroxide until permanent pink colour appears, bath pointage should
be maintained between 18 to 22 ml. Adjust the pointage by adding
Kemphos-330(c) to the bath. For each pointage less add 150 ml. of
Kemphos-30(c) per 100 liters of bath.
Kemphos-002 (accelerator) Test
starch-iodide paper.
Dip a piece of starch lodide paper in the bath.
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No Accelerator
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Remains White
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Insufficient Accelerator
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Pale Mauve
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Optimum
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Blue to Dark Blue
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Excess Accelerator
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Black
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It is very important to have the correct amount of
Accelerator-002 in the bath. Excess in the bath will cause excess sludge formation and
wastage of Kemphos-330(c) insufficient addition causes accumulation of Iron
salts and throws the bath out of balance.
Titration of
Kemphos-002(accelerator)
Pipette out 50 ml bath solution into flask. Add 5ml of concentrated
H2SO4 and mixed it well. Titrate it against N/10 KmNO4
solution to a pink colour which will persist for a few seconds.
Normal limits for Kemphos-002 (accelerator) titration is 2.6 ml.
Lower limit is preferable. Prior to titration starch iodide paper
should be positive. Replenishment Approximately 30 ml. of 25%
Kemphos-002 (accelerator) solution in water should be added to
increase the Kemphos-002(accelerator) titration by 1 ml.
Chemical
Replenishment
Restore the bath to the working level by adding water to makeup evaporation loss and drag out losses. Check the Kemphos-330(c)
pointage.
Safety Measures
Kemphos-330(c) is an acidic liquid
material, and while handling proper care should be taken. Protect
eye, skin by means of goggles, aprons, gloves etc. If it comes in
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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