SURFACE TREATMENT

After machining of the component, the components are sent for a surface treatment. Surface treatment is done in order to prevent the component from the rust and coating of shaft. The components are treated with various chemicals like Nutrapon, Rustoken 25. In a surface treatment area, the small components like oil tube, spring etc are cleaned in a small component cleaning machine. In surface treatment, shafts is coming after all maching operation coating is done in various steps.

Wet tumbling This is a vibrater in which ceramic media is vibrating along with shafts . This is used to remove the burr on shafts.

Dry tumbling After dry tumbling , shafts is again vibrating with dry media for polishing and finishing the shafts. Then shafts is degreasing in ultrasonic heater for removing some amount of dirt etc .

Mn. PHOSPHATING COATING SYSTEM OF SHAFTS In the system , there are 12 no. of tanks . It provide coating on shafts . These Tanks are:

1. DEGREASING 1 2. DEGREASING 2 3. DEGREASING 3 4. WATER RINSE5. ACTIVATION 1 6. ACTIVATION 2 7. PHOSPHATING1 8. PHOSPHATING 2 9. WATER RINSE 210. PASSIVATION 11. OVEN 112. OVEN 2

Chemical require in tanks to make Mn. Phospating system : TANKCHAMICALQUANTITYCHANGE IN

1. DE GREASING-1Nutrapon1 Ltr.After 1 week

2. DE GREASING-2Nutrapon1 Ltr. After 1 week

3. De GREASING-3Nutrapon Ltr. After 1 week

4. WATER RINSE-1

D.M waterFully tankOver flow

5. ACTIVATIONParocolinMn.(Powder)1K.gAfter 3 days

6 . PHOSPATINGParcolubricate+ Nutralizer(Powder)20 Ltr.+20 cup(And check pointage)After 15 days

7.WATER RINSE-2

D.M waterFully tank

Over flow

8. PASSIVATIONNutrapon1 Ltr.After 3 days

Testing of Tanks:-

1. PHOSPATING: There is 3 type of testing is:

* FREE ACID (FA) * TOTAL ACID (TA) * IRON POINT.

*FA: 2ml. chamical ph. + 5-6 drop of water + 5-6 drop of Bromo Green solution + sodium hydroxide (NaOH) [Actual pointage = 0.8-1.2] *TA: 2ml. ph. chamical + 5-6 drop of water + 5-6 drop of Phenol pythylon + sodium hydroxide (NaOH) . [Actual pointage = 6-8] *IRON POINT: 100ml. chamical ph. + 5-6 drop orengr methylene Pottesium permagnet. [Actual pointage = 1-3] 2. WATER RINSE -1: 100 ml. W.R + 5-6 drop of orengr methylene + sulphuric acid (H2SO4). [Actual pointage = 1-3] 3. WATER RINSE-2: 100 ml. W.R + Phenol pythylon + sodium hydroxide (NaOH).[Actual pointage =