Chapter No.4 Results and Discussion

33

Chapter # 4

Results and Discussions

4.1) Table of Results

Test no. Property Sample Guard DOT 3

1 Dry Boiling Point 170 oC 180 oC

2 Wet Boiling Point 122 oC 140 oC

3 Specific Gravity 0.9889 1.0841

4 Viscosity 4.54 Kg/mSec 9.5 Kg/mSec

5 Effect on Rubber No Significant Effect No Effect

6 Effect on Copper No Significant Effect No Effect

Fig4.1 (a) prepared Sample

Chapter No.4 Results and Discussion

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4.2) Discussion on Results

4.2.1) Boiling Point:

The dry boiling point of sample product produced is 170 oC. While the boiling

point of standard brake fluid taken for comparison OC. Hence

our product has value of dry boiling point much closer to the commercial product,

although this small difference is due to absence of additives in the sample product.

Same is the case with wet boiling point. Wet boiling is less than the dry boiling point due

to the presence of the 3% to 5% water.

4.2.2) Specific Gravity:

The specific gravity of sample product produced is 0.9889. While the specific

gravity of standard brake fluid taken for comparison

shows that our product has almost same value of specific gravity as that of commercial

product.

4.2.3) Viscosity:

The viscosity of sample product produced is 4.54 Kg/m Sec. While the viscosity

of standard brake fluid taken for comparison

difference in values of viscosities is due to the fact that many additives are added in

commercial product to improve viscosity, while those additives are not added in our

sample product due to their unavailability.

The additives which are commonly used to improve properties of Brake Fluids are:

1. Tributyl phosphate,

2. Benzotriazole

3. Tolytriazole

4. Triethanol amine

5. Cyclohexyl amine

6. Dibutyl amine

7. Dibutylhydroxy toluene

8. Bisphenol A

9. 3-diethanol aminopropyl Silane

Chapter No.4 Results and Discussion

35

4.2.4) Effect on Rubber:

There was no significant effect of sample product on rubber, as no swelling of

rubber was occurred on keeping rubber dipped in sample product for 1 week. This

indicates that our product is appropriate to be used against rubber (as the rubber seals

in hydraulic brakes).

(a) (b)

Fig4.3: (a) Experimental setup to see effect on Rubber and copper

Fig 4.3 (b) Rubber piece after Test (No swelling or wear and tear)

4.2.5) Effect on Copper:

There was no significant corrosion effect of sample product on copper, as copper

strip was not corroded on keeping dipped in sample product for seven days. This

indicates that our product is appropriate to be used against copper tubes.

Fig4.4 (a): Copper Sample Before Test Fig4.4 (b) Copper Sample after Test