Frank Alkanes India Pvt Ltd

FRANK TONE

INTRODUCTION

Frank Phos FZ-6 is a chemical intended for an accelerated process for providing Zinc

Phosphate coating on steel and zinc when warm dipped.

FEATURES

Produces highly adherent coatings.
Designed to tolerate higher load ratios and hence very little control is needed.
Special accelerators and refiners produce highly refined, heavier coating in a very short

time.

Coating weight of 4-10 gms / Sq.m is easily achieved.
Produces highly corrosion resistant coatings.
Coating weight can be varied from medium to heavy by varying the coating time.
Simultaneous processing of Steel & Zinc surfaces can be done.

DUAL PURPOSE PROCESS

FRANK PHOS FZ-6 gives medium to heavy weight coatings after acid or Alkali cleaning

and fine crystalline coatings after FRANK SURFINE TX pre dip.

IDEAL FOR PAINTS, STAINS AND OILS

FRANK PHOZ FZ-6 coatings form an excellent foundation for paints, stains and oils. The

coating obtained after FRANK SURFINE – TX Pre dipping are sufficiently fine to enable a

good gloss to be achieved with subsequent paint systems.

CONVENIENT FOR DEEP DRAWING, EXTRUSION AND COLD FORGING : -

FRANK PHOS FZ-6 is very easy to operate to get appropriate phosphate coating for the

above deforming process. It can be operated with Frank Tone or with Iron build-up.

EASY OPERATION

Zinc Phosphating process with FRANK PHOS FZ-6 are easy to operate and are controlled

by simple tests requiring no Chemicals knowledge. No fumes or odours are given off.

APPLICATIONS

FRANK PHOS FZ-6 is ideal for a wide range of zinc and ferrous metal articles. Its ability

to produce coatings of different weights depending on the cleaning methods and process

parameters used, makes it particularly suitable for pretreating a large range of articles for

different purposes.

APPROVALS

FRANK PHOS FZ-6 meets the specification WPN/GPN/ 3:1965 as a class l accelerated

process and the requirements of its 3618 : 1966 Class B/Class A-2.

OPERATING SUMMARY

Zinc phosphating with Frank Phos FZ-6 & Frank Tone ( with Toner )

BATH MAKE UP

For every 1000 litres add the following to the water in sequence with stirring.

FRANK PHOS FZ-6 50 Litres.

Frank Tone ( 25% w/v solution) : 1 Litre.

CONTROL POINTS ( GUIDANCE ONLY)

POINTAGE - 25 – 35

Frank Tone Titration - 0.5 – 1.5 ml

Temperature - 65 – 70 °C

Immersion Time - 5 – 10 minutes.

PROCESS

SURFACE PREPARATION :

Remove all grease by FRANK SOL / FRANK MOVE FG-3 followed by rinsing.
Remove any rust and scale present by immersing in FRANK DINE FDR-4 followed by

thorough rinsing.

PHOSPHATE COATING

Immerse in the FRANK PHOS FZ-6 bath for 5-10 minutes at 65-70°C

RINSING :

Rinse in clean running water followed by a hot water rinse containing a trace of FRANK

BOND. FRANK BOND in the final rinse counteracts the effects of any hardness in the rinse

water and improves the corrosion resistance . It also acidifies the surface slightly before

drying and thereby ensures good paint adhesion under prolonged humid conditions.

DRYING : Dry using a oven or compressed air if necessary. Heavy range steel parts often

contain sufficient heat to dry the surface and no extra heat is needed. Small parts can be

dried on a hot plate or in a hated centrifuge.

SEALING : Phosphate coating are not in themselves Rust Proof and must be sealed with

plant, stain or oils as soon as possible to provide permanent protection. Details of Frank

range of speciality rust preventives will be made available on request.

BATH CONTROL

Restore the working level of the bath regularly, with tap water to make good evaporation

and drag out losses. Check the FRANK PHOS FZ-6 and FRANK TONE concentration using

the tests described below. Before testing adjust the FRANK PHOS FZ-6 bath to its normal

working level with tap water, stir and check that the bath is at its working temperature.

FRANK PHOS FZ-6 concentration – Pointage Titration.

Pipette 10 ml of the bath solution into a conical flask.
Add a few drops of Phenolphthalein indicator solution and mix by shaking.

3.Titrate with 0.1 N Sodium Hydroxide until a permanent pink colour is obtained.

4.The number of ml of 0.1 N Sodium Hydroxide added is the points of the bath. Add 180

ml if FRANK PHOS FZ-6 per 100 litres of bath solution for each point below 25. ( for a

5.0% v/v solution).

FRANK TONE CONCENTRATION

It is important to maintain the FRANK TONE at the correct concentration and if required

additions of FRANK TONE should be made at regular intervals. If there is too much

FRANK TONE present or large amounts are added in frequently there will be excessive

sludge formation and wastage of FRANK PHOSFZ-6 . If there is too little FRANK TONE

then iron salts may accumulate in the bath and throw the bath out of balance. The bath then

has a brown colour and although it may turn starch iodide paper very pale blue, it will not

produce normal coatings. The brown colour can be cleared by raising the temperature of the

bath as much as possible and making successive addition of 200 ml of FRANK TONE solution

per 100 litres of bath. While clearing the colour , brown fumes will be given off and heavy sludge will form. The bath should then be desludged before bringing into use.

To control the FRANK TONE at its correct level its concentration should be checked several

time a day. This is normally done by dipping a starch iodide paper in the bath, but if required it can be done by titration.

1.TEST PAPER METHOD:

Dip starch Iodide test paper in the bath, After 15 seconds the colour change will indicate

the concentration of the Frank Tone as shown:

FRANK TONE CONCENTRATION COLOUR OF TEST PAPER

No.FRANK TONE Remains white

Insufficient Frank Tone Pale Mauve

Correct FRANK TONE Blue to Dark blue.

Excess FRANK TONE Black.

If necessary, add more FRANK TONE, dissolved in a little water.

II TITRATION METHOD

1.To 50 ml of the bath solution add about 10 ml of 50% sulphuric acid.

2.Titrate with0.1 N potassium permanganate until the pink colour persists for 15 seconds.

3.The number of ml of potassium permanganate added is the FRANK TONE titre value

and this should be 0.5 – 1.5 ml. If necessary add more FRANK TONE . Approximately 30

ml of FRANK TONE solution will raise the Litre by 1 ml in a 100 litre bath.

ZINC PHOSPHATING WITH FRANK PHOS FZ-6 AND IRON BUILD UP ( WITH OUT

FRANK TONE)

SUMMARY OF OPERATING DATA

Bath make – up

For each 100 litres of bath , add to the water with stirring :

Process without FRANK TONE : FRANK PHOS FZ-6 – 5 Litres.

CONTROL POINTS ( * FOR GUIDANCE ONLY)

Parameters Process

POINTS 25.0 – 35.0

Ferrous Iron Concentration 0.05 -0.4%

Immersion Timings 15 – 20 minutes

Temperature 75 - 95° C

PROCESS

Pre cleaning

Remove all grease by trichloroethelene degreasing, FRANK MOVES, or solvent wiping,

Rinse where necessary.

Remove any rust and scale present by immersing in FRANKDINES and rinsing.

Alternatively If the scale is heavy, the surface is best cleaned by sand blasting or alternatively

by pickling and rinsing thoroughly in two stages.

PHOSPHATE COATING

Immerse in the FRANK PHOS FZ-6 bath for 15 -20 minutes at 75 – 95 ° C

for ‘ process without FRANK TONE.

RINSING

Rinse in clean running water followed by a hot water rinse containing a trace of FRANK

BOND in the final rinse counteracts the effects of any hardness in the rinse water and

improves the corrosion resistance. It also acidifies the surface slightly before drying and

thereby ensures good paint adhesion even under prolonged humid conditions.

NOTE :

For Defence specification work an additional hot water rinse is required before the final rinse.

DRYING

Dry using an oven or compressed air if necessary .Small parts can be dried on a hot plate or centrifuge,

SEALINGS

Phosphate coatings are not in themselves rust – proof and must be sealed with paint or oils

as soon as possible to provide permanent protection.

BATH MAKE UP AND OPERATION FOR ZINC PHOSPHATING WITH

FRANK PHOS FZ6 AND IRON BUILD – UP

Chemicals required

The process requires FRANK PHOS FZ-6 STEEL WOOL and FRANK BOND for use in the final rinse.

MAKE-UP

Partially fill the tank with water and add 5.0 litres of FRANK PHOS FZ-6 for every 100

litres of bath.

Fill in the bath to its operating level with water and stir the solution thoroughly.
Heat the bath to the temperature of 75-80° C and add 25-50 gms of degreased steel wool

per 100 litres of solution.

4.After about 10 mts when the gassing has ceased, remove the wool, heat the bath to its operating

and bring into use.

NOTE

The FRANK PHOS FZ-6 bath is controlled by determining its strength and iron concentration

as follows:

DETERMINATION OF STRENGTH

FRANK PHOS FZ-6 STRENGTH BY TITRATION METHOD

Pipette 10 ml of the bath solution into a beaker.
Add a few drops of Phenolphthalein indicator and mix by shaking.
Titrate with 0.1 N Sodium Hydroxide until a permanent pink colour is obtained.
The number of ml of 0.1N Sodium Hydroxide added is the “Point” of the bath .Add 170

ml of FRANK PHOS FZ- 6 per 100 litres of bath for each point below 20

DETERMINATION OF IRON CONCENTRATION

Pipette 10 ml sample of bath solution into a conical flask. Add 5 ml of 50%
Sulphuric acid solution. Titrate with N/10 potassium permanganate solution at a pink

colour that persists for at least 15 seconds. Ferrous Iron = No.of mls of N/10 potassium permanganate required X 0.056 when the ferrous iron concentration reached 0.4% or more

discard all or part of the bath.

MAINTENANCE

During processing, sludge is formed as a natural by product of the coating reaction. This accumulates at the bottom of the tank. Being inert, the sludge will not affect the chemical

balance of the FRANK PHOS FZ-6 bath but with excessive accumulation it may touch the

work causing improper coating. It is therefore, necessary to desludge the FRANK PHOS FZ-6

bath at regular intervals. To do this allow the sludge to settle overnight and pump the top clear liquid into the emptied rinse tank and discard the sludge. Wash out the FRANK PHOS FZ-6 tank and return the solution . Restore the bath to its operating level by adding tap water and FRANK PHOS FZ-6 in the same proportions as the original bath.

STAGE

PROCESS

CHEMICAL

TEMP

TIME

(Minutes)

10.

DEGREASING

RINSING

DERUSTING

RINSING

SURFACE

CONDITIONING

(OPTIONAL)

PHOSPHATING

RINSING

PASSIVATION

AIR DRYING

(OPTIONAL)

FRANK MOVE FG-3

--------

FRANK DINE FDR-4

--------

SURFINE TX

FRANK PHOS FZ-6

(a) with Frank Tone

(or )

(b) with iron build up

( without FRANK

Tone)

------

FRANK BOND

---------

90-95° C

AMBIENT

65-70° C

75-85° C

AMBIENT

60-75° C

80-120° C

5-10

FLASH

5-20

FLASH

5-10

10-15

FLASH

HANDLING PRECAUTIONS

FRANK PHOS FZ-6 is slightly acidic and clothing should be protected if there is a possibility of splashing with the solution wash off any splashes at once with cold water. If the solution gets in the eyes wash out with liberal quantities of water and obtain immediate medical attention.

CONTROL BATH

CONTROLLING OF ZINC PHOSPHATING BATH CONSISTS OF FRANK PHOS FZ-6

AND FRANK TONE

DETERMINATION OF FREE ACID : ( OPTIONAL )

Frequency of checking : During initial bath make up and once in a week.

Apparatus Required:

1.Burette ( 50 ml )

2.Pipette ( 5 ml, 10 ml )

3.Conical flask ( 250 ml )

Reagents Required :

0.1 N Sodium Hydroxide solution.
Methyl orange or Bromophenol Blue indicator solution.

Procedure :

(a) Using Methyl Orange as indicator :

1.Pipette 10 ml of the bath solution in to a beaker and dilute to about 100 ml with

distilled water.

2.Add few drops of methyl orange indicator and mix by shaking.

3.Titrate with 0.1N sodium hydroxide until a definite yellow colour is obtained.

The number of ml. added is the free acid titration of the bath.

( b ) Using Bromophenol Blue as indicator:

1.Pipette 10 ml of the bath solution in to a beaker and dilute to about 100 ml

With distilled water.

2.Add a few drops of Bromo Phenol Blue indicator and mix by shaking.

3.Titrate with 0.1N sodium hydroxide until the colour changes from yellow

To permanent violet / blue is obtained.

DETERMINATION OF TOTAL ACID

Frequency of checking : Everyday in the morning.

Apparatus Required

1.Burette ( 50 ml)

2.Pipette ( 5 ml, 10 ml)

3.Conical Flask ( 250 ml)

REAGENTS REQUIRED

1.0.1N Sodium Hydroxide solution.

Phenolphthalein Indicator. 1/3

PROCEDURE

1.Pipette 10 ml of the bath solution into a beaker.

2.Add a few drops of Phenolphthalein indicator and mix by shaking..

3.Titrate with 0.1N sodium hydroxide until a permanent pink colour is obtained.

The number of ml of 0.1N Sodium hydroxide added is the “point” of the bath. Add 180, ml of FRANK PHOS FZ-6 per 100 litres of bath for each point below 25.

Recommended pointage : 25 – 35 ml ( Guidance only)

DETERMINATION OF IRON CONCENTRATION

Frequency of checking : Once in a week.

Apparatus required :

Burette ( 50 ml ).
Pipette ( 5 ml, 10 ml ).
Conical flask ( 250 ml ).

Reagents Required :

1.50% Sulphuric Acid.

2.N/10 Potassium Permanganate solution.

Procedure :

Pipette 10 ml sample of bath solution into a conical flask. Add 5 ml of 50% sulphuric acid solution. Titrate with N/10 Potassium permanganate solution to a pink colour that persists for atleast 15 seconds.

Ferrous Iron = No.of mls of N/10 Potassium permanganate required x 0.056.

When the Ferrous Iron concentration reaches 0.4% or more discard all or part of the bath.

Recommended Iron concentration : Below 0.4% ( Guidance only).

DETERMINATION OF TONER CONCENTRATION :

Frequency of checking :

During initial bath make up and every alternate days.

Apparatus Required :

1.Burette ( 50 ml).

2.Pipette ( 5 ml, 10 ml ).

3.Conical flask ( 250 ml ).

Reagents Required :

1.50% Sulphuric Acid.

2.N/10 Potassium Permanganate solution.

Procedure :

1.To 50ml of the bath solution add about 10 ml of 50% sulphuric acid.

2.Titrate with 0.1 N potassium permanganate solution until the pink colour persists for 15 seconds.

3.The number of ml of potassium permanganate added is the FRANK TONE titrate value and this

should be 0.5 – 1.5 ml . If necessary add more FRANK TONE. Approximately 30 ml of FRANK

TONE solution will raise the titrate value by 1 ml in a 100 litre bath.

Recommended pointage : 0.5 -1.5 ml.