Applications
Metal cleaning, finishing and vapour degresing:
Cold, ultrasonic and vapour degreasing of metal parts between fabrication steps and before finishing or assembly, surface preparation of metal parts for galvanising, anodising, electro plating, painting and bonding.
For quick removal of oils and waxes in dip coating of rust preventing formulations, the oil and grease covered parts are placed in an atmosphere of TCE vapour. The hot vapour condenses immediately on the cold metal surface, dissolving the oils and greases and flushing them. The work heats to the vapour temperature in minutes, leaving the work clean, dry and ready for further treatment.
Specifications
|
Type1 |
Type2 |
Releative density at 27/ 27°C |
1.452 to 1.458 |
1.447to 1.458 |
Residue on Evaporation mg/ 100 ml max. |
15 |
15 |
Distillation yield between 86 and 88 C at 760 mm Hg Percent by volume, min. |
95 |
95 |
Alkalinity (as Na2 Co3) by weight max% |
0.005to 0.02 |
0.0025 |
Free Chlorine |
Nil |
Nil |
Water, CPM |
150 max |
150 max |
Colour, Pt Co, APHA |
30 max |
30 max |
Non Volatile matter, epm |
100 max |
100 max |
Handling and Storage
TCE may be employed in the presence or absence of air, water and light with any of the common metals, at temperatures upto 120C. It is practically nonflammable at normal room temperature. If exposed to sudden high temperatures, it may evolve toxic gases due to decomposition. The solvent should be kept neutral or alkaline in pH and free of corrosion products. |