CHEMPHOS 2
INTRODUCTION
The use of zinc phosphate coatings as drawing lubricant carriers has become firmly established in the wire
and tube drawing industries. The benefits of such coatings in facilitating higher drawing speeds, long tool
life, and improved surface finish are now widely recognized.
CHEMPHOS 2 is zinc phosphating chemical, ideally suited to meet the above requirements in wire and
tube drawings and also in other jobs of cold mechanical deformation such as cold heading,
cold extrusion etc.
BENEFITS
Single chemical process
No iron build up. No need to add any external oxidizing agent
Strongly adherent
Lubricant absorbent zinc phosphate coating
Excellent wear resistance
Improved wire / tube drawing – higher speeds and greater reductions
Increased tool life
Smooth Drawing - no metal pick up or jarring
Reduces friction – no breakups or scratching
Corrosion protection – the fused film of zinc stearate formed by reaction
during drawing, gives excellent protection
Abusability - Being a single chemical process easy to control & stands a lot of shop
abuse
… P2
2
SUMMARY OF OPERATING DATA
BATH MAKE UP
For each 100 litres of bath, add to the water with stirring:
CHEMPHOS 2
CONTROL POINTS
3 to 5 litres
( For Normal Operating Conditions )
POINTAGE
22 – 35
TEMPERATURE
65 – 70O C
IMMERSION TIME
5 – 10 minutes
PROCESS
The work after thorough degreasing in CHEMLENE 1D must be pickled in Hcl or H 2So4
after pickling, it is rinsed twice - first with unheated water and then with hot (65-75oC)
water. These rinses should be continuously overflowed to maintain cleanliness. The
tanks should be drained and cleaned daily. When wire is treated in coils, a highpressure hose rinse is essential for thorough cleaning.
BATH CONTROL
The CHEMPHOS 2 bath is controlled by a POINTAGE TITRATION, using, the following
method.
POINTAGE TITRATION
1.
2.
3.
4.
Pipette a 10 ml sample of the CHEMPHOS 2 bath into a beaker.
Add 6-10 drops of Phenolphthalein indicator
Fill the burette to the zero mark with 0.1N Sodium Hydroxide
While stirring the sample, slowly run in 0.1N Sodium Hydroxide from the
burette until a permanent pink color appears.
5. Record the number of milliliters of Sodium Hydroxide used as the POINTAGE.
REPLENISHMENT
Add 150ml of CHEMPHOS 2 per 100 litres of bah for each point lacking.
should be kept within one point of the specified POINTAGE.
The bath
MAINTENANCE
During processing, sludge is formed as a natural product of the coating reaction. This
accumulates in the bottom of the tank and weekly desludging of the bath is
recommended. To do this, allow the sludge to settle, decant the clear solution into the
emptied rinse tank and discard the sludge. Wash out the CHEMPHOS 2 tank and
return the solution. Restore the bath to its operating level by adding water and
chemicals in the same proportion as used in the original bath.
.. p 3
3
AFTER TREATMENT
After the work has been coated with CHEMPHOS 2, it should be rinsed with water at
room temperature. The rinse water should be overflowed sufficiently to keep it clean
and uncontaminated.
It should then be rinsed in a hot (70-90oC) NEUTRALIZER ( refer Tech Note ) rinse. The
neutralizing rinse is made up with 0.1kg of NEUTRALIZER for 100 litres of rinse bath.
The work is then dipped in the hot CHEMLUBE lubricant bath for 3 – 5 mts and dried
thoroughly by hot air blow, before drawing
NOTE
The above recommendations are given in good faith and carries no warranty. The user
will have to satisfy himself in all respects.
Information regarding plant, equipment or materials not manufactured by THIN CHEMIE is based on experience and is provided by part of the Technical Service. THINCHEMIE accepts no responsibility for such plant, equipment and material.
FURTHER INFORMATION
For further information on Special Oils, Coolants, Rust Preventives, Chemical Processes
for Pretreatment of Metal Surfaces and Prevention of Corrosion, apply to the following:
CHENNAI OFFICE
:
THIN-CHEMIE FORMULATIONS
‘ BEJOYA ‘
30, SCHOOL VIEW ROAD
CHENNAI 600 028.
PHONE : 2493 81 48
FAX NO : 2495 4012
E - MAIL : thinchem@yahoo.com
Web
: www.ThinChemie.com
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