- Melt match wax = 25 kg
- Thin with wool grease (lanoline) = 100 kg.
- Cool and add mineral turpentine oil = 126 kg
Yield: 300 Litres.
Thin down with required viscosity.
Specific gravity at room temperature 0.84
Any one can make brake fluid by simple mixing.
Raw caster oil = 250 ml
Diacetone alcohol = 250 ml
Mix them thoroughly without foaming.
The brake fluid is ready.
|2.||78% Phosphoric acid – Industrial grade||4.0|
|5.||37% Hydrochloric acid solution||24.5|
Supply viscosity @ 20 deg C = 1750 cps
pH = 1.3
Specific Gravity @ 25 deg C = 1.049
Bulk density @ 25 deg C = 8.74
Suggested surfactant : Sulfonic N 150 (non-ionic)
- Pigment testing as per IS 33
- Solvent testing as per IS 82
- Evaluation of paints and pigments
- Testing plastic and rubber components
- Salt spray resistance
- Humidity resistance
- Accelerated QUV weatherometer test
- Bend test
- Impact resistance test
- Water analysis
- Acid / alkali / fertilizer / water resistance tests
- Cross hatch test
- Glossmeter reading in 20 deg, 45 deg and 80 deg
- Colour matching computer
- Pencil hardness test
- Metal pretreatment bath parameter maintenance
- Sieve residue analyzer
For finishes made with Polyester epoxy powder coat on nano-treated mild steel components. All tests are conducted on panels as recommended in ASTM standards.
|Colour||L*a*b readings of less than 0.3 under cool white light to RAL Shades||Ref. RAL Shade cards|
|Gloss||60 +/- 10 at 60o at 1.5 mil||ASTM D523|
|Hardness||No film cut while gouging with a mechanical pencil using a 2H lead||ASTM D3363|
|Adhesion or cross hatch test||No loss of adhesion Class 5B||ASTM D3359|
|Flexibility||No cracking or peeling at 1/8” Conical Mandrel||ASTM D522|
|Chemical and Stain Resistance||Five drops of each reagent under a watch glass for 4 hours. There shall be no more than a trace of stain. Change in gloss shall not exceed standard. Reagents used: IPA, Nail polish remover, fizzy drinks like coke, Mustard, Tea, Coffee, 5% acetone||ASTM D1308|
|Impact Resistance||No peeling or loss of adhesion using adhesion tape.||ASTM D2794|
|Salt Spray Resistance||Min. 400 hours, no creeping corrosion||ASTM B117|
|Humidity Resistance||No blistering after 200 hours||ASTM D2247|
|Abrasion Resistance||0.3 g – 0.4 g material loss after 100 cycles of Tabor Abrader||ASTM D4060|
|Oven Bake Resistance||Within the specification of colour, gloss, hardness and adhesion after double bake of one panel||ASTM D2454|
|UV Resistance||Minimal change in colour or gloss after 60 hours using QUV-A bulbs||Ref. QUV Weatherometer manual|
|S. No.||Raw materials||Qty (kg)|
|2||Sodium hexa meta phosphate||0.20|
|4||Anionic dispersing agent||0.70|
|5||Nonionic dispersing agent||0.40|
|7||Hydroxy ethyl cellulose||0.50|
|9||Dry film preservative||0.70|
|12||Titanium dioxide – anatase||18.00|
|13||Calcined china clay||5.00|
|16||Pure acrylic emulsion||35.00|
|Approximate rate per kg|
|Pigment paste for tinting|
|100 G tank|
|10 kg, 4 kg, 1 kg|
Degreasing bath control parameters
|Bath concentration for immersion||5%|
|Bath temperature||30 deg. C min. 60 deg. C max.|
|Immersion time||5 minutes to 10 minutes|
|Free alkali, points||20 to 35|
|Total alkali / Free alkali ratio||< 3.0|
Testing and Control:
Warning: Do not pippette by mouth, use a pro-pipette.
Pipet a 10 ml degreasing bath sample solution into a 150-ml beaker. Add 5 drops of phenolphthalein indicator. Titrate with Standard Acid Titrating Solution (0.1 N H2SO4) to the end point. Disappearance of pink colour is the end point. The volume of the titrating solution is the free alkali value in points.
Disappearance of pink colour – End point
Pipet a 10 ml of degreasing bath solution sample into a 150-ml beaker. Add 5 drops of bromocresol indicator solution. Titrate against with the Standard Acid Titrating Solution (0.1 N H2SO4) to the end point. Appearance of pale green from blue colour is the end point. The volume of Titrating Solution is the total alkali value in the alkali bath.
End point: Blue to green
Total Alkali/Free Alkali Ratio:
As the degreasing bath is used regularly and frequently, it becomes contaminated, and the total alkali value will rise. Thus, the ratio of the total alkali value to the free alkali value will also rise and this becomes a useful measure of the degree of contamination of the cleaner solution. The solution is periodically dumped or continuously overflowed to keep the total alkali to free alkali ratio from exceeding the maximum value determined for the system. Total Alkali/Free Alkali Ratio should be regularly monitored. The value under typical cleaning conditions should not be allowed to exceed 3.0.