Frank Alkanes India Pvt Ltd

FRANK DINE FDR-4

INTRODUCTION

FRANK DINE FDR-4 is a Chemical intended for removing rust and scale from steel surfaces when dipped.

ADVANTAGES

FRANK DINE FDR-4 will remove rust and scale from ferrous components efficiently without giving any obnoxious fumes. Being in inhibited type the rust and scales are removed with minimum metal loss.

OPERATIONAL DATA ( For Guidance only)

Application : By Immersion
Bath Strength : 1:2 to 1:3
Temperature : Room Temperature
Temperature Time : 10 to 15 minutes
Pointage : 20 – 30
Tank Material : M.S.with FRP ( 5mm Thk Isopthaleic) Lining

PROCESS

PREPARATION OF THE SURFACE :

Remove oil and Grease by either FRANKSOLS, Trichloroethylene degreasing or by FRANK, MOVES. Remove any loose heavy rust from Iron and steel surfaces by wire brushing, if required. Immerse the components in FRANK FINE FDR-4 until clean. The time depends on the amount of contaminations on the metal and the concentration and the iron content of the bath. Light to medium rust will be remove in few minutes.

BATH OPERATION:

CHEMICAL REQUIRED

The process uses FRANK DINE FDR-4 which is added to water to give a solution of the required concentration.

MAINTENANCE

Keep the bath at its operating level by FRANKDINE FDR-4 and water. As the bath is used ferrous Iron accumulates in the solution and this gradually shows down the derusting action. Consequently, as the bath ages progressively more concentrated FRANK DINE FDR-4 bath will quicken the derusting.

When the addition of concentrated FRANK DINE FDR-4 speeds up the derusting for a relatively short time only and a white powdery deposit is formed on the work, the bath spent should be discarded.The FRANK DINE FDR-4 concentration and iron content are measured as follows:

FRANK DINE CONCENTRATION

1.Pipette 10 ml of the bath solution into a measuring cylinder and dilute 100 ml with distilled water. Mix thoroughly.
2.Pipette 10 ml of the distilled solution into a flask and add about 100 ml of distilled water and about 1-2 drops of Bromocresol green indicator.
3.Titrate with 0.1N sodium hydroxide until the colour changes from yellow through green to a definite blue

The number of ml of sodium hydroxide used is the Pointage of the bath.

To raise one point add about 1 ltr. of FRANK DINE FDR-4 for every 100 Ltrs.of bath ( for a 25% v/v solution (1:3) )

NOTE :

Please note that a solution of 25% v/v (1:3) concentration will give a strength of minimum 24 points and 31 points for a 33 1/3 % v/v ( 1:2) solution.

IRON CONTENT

1.Pipette 10 ml of the diluted bath solution into a flask and add 10 ml of 50% Sulphuric acid .Mix well.
2.Titrate with 0.1N Potassium Permanganate Solution until a light pink colour stable for at least 15 seconds is obtained.
3. The percentage of the ferrous iron in the bath is obtained from: % Fe W/v = Titration in ml x 0.56.

When the percentage of the ferrous iron in a FRANK DINE bath touches 7% the bath should be discarded and a fresh one made.

HANDLING PRECAUTIONS :

FRANK DINE FDR-4 contains acid and has a drying action on the skin, which may cause chapping and make the skin receptive to irritants. To prevent damage to the operators clothing rubber or PVC boots and aprons are recommended.

If FRANK DINE FDR-4 gets on the skin, wash it off immediately with cold water. As a regular precaution operators should rub a protective cream into the hand before starting work. If FRANK DINE FDR-4 is splashed into the eyes, wash it away with liberal quantities of clean water and obtain immediate medical attention.