| 摘要 |
PROBLEM TO BE SOLVED: To provide an economical, excellently cleanable, highly safe cleaning method for a sintered compact where there is no surface stain and the ooze of cleaning residual oil after drying, drying temperature is lower than that in a water based cleaning agent, and the process from drying to parts cooling can be performed in a short time. SOLUTION: The method for cleaning a sintered compact comprises: a cleaning stage (A) where a sintered component is contacted with a hydrocarbon based cleaning liquid, so as to be cleaned; a coating stage (B) where it is contacted with a rust preventive solution obtained by uniformly dissolved a rust preventive into an organic solvent in such a manner that the concentration of the rust preventive is controlled to 1 to 10 wt.%, so as to form a rust preventive film on the surface of the sintered component; and a stage of rinse (C) where it is contacted with hydrofluorocarbon and/or hydrofluoroether (HFC/HFE), and the hydrocarbon based cleaning liquid and/or organic solvent stuck to the sintered compact is substituted with the HFC/HFE. COPYRIGHT: (C)2008,JPO&INPIT
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