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SOLVENT VS AQUEOUS WASHING – DEGREASING AGENT COMPARISON

Greater wettability

Low surface tension (typically 25-30 dynes/cm as opposed to water at 72 , which means that the liquid can get into (and out of) geometrically complex parts such as small diameter threaded holes or blind holes which are consequently subjected to a thorough flushing action.

SUITABLE FOR ALL TYPE OF CONTAMINANTS

Organic solvents are generally suitable for a wide range of contaminants whereas aqueous solutions, on the other hand, are “soil specific” often requiring a range of detergents/chemicals in order to obtain satisfactory results. Such cleaning chemicals may present problems with compatibility.

Quick and effective drying

The higher volatility of organic solvents means that component drying is quick and effective. The latent heat of evaporation of water is 2280 kj/kg whereas the value for organic solvents is typically 200-300 kj/kg.

A PROCESS CARRIED OUT UNDER VACUUM

By creating a vacuum in the process chamber, operating temperatures are reduced thereby reducing energy costs and solvent “stress”.

Critically, in the drying phase, the solvent boiling point is reduced and evaporation is both quick and effective giving shorter cycle time.

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