Method and apparatus for cleaning metallic workpieces

Details Method and apparatus for cleaning metallic workpieces Method and apparatus for cleaning metallic workpieces

1991-12-23

1993-12-07

Morris, Theodore

Cleaning and liquid contact with solids

Processes

For metallic, siliceous, or calcareous basework, including...

134 10, 134 21, 134 251, 134 254, 134 26, 134 29, 134 40, 134 73, 134105, 134200, B08B 300, B08B, B08B 500, C23G 114

Patent

active

052680363

ABSTRACT:
A method and an apparatus for treating workpieces with a fluid, in particular for cleaning metallic workpieces prior to a subsequent heat treatment are disclosed. The workpieces are positioned in an air-tight washing vessel. The vessel is filled with an immersion bath substantially covering the workpieces and having a temperature of between 50.degree. C. and 90.degree. C. After closing the washing vessel it is evacuated down to a vacuum having a pressure being below the saturation vapor pressure of the fluid at the prevailing temperature. Thus, the fluid starts to boil although its temperature is substantially below the boiling temperature of the fluid at atmospheric pressure. After a certain period of time of maintaining the vacuum and the boiling, the vacuum is relieved and the bath is discharged.

REFERENCES:
patent: 2567820 (1951-09-01), Ernest
patent: 3460990 (1969-08-01), Barday
patent: 5011542 (1991-04-01), Weil
patent: 5106425 (1992-04-01), Sluga et al.
patent: 5137581 (1992-08-01), Takahashi
patent: 5143103 (1992-09-01), Basso et al.

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