| 摘要 |
PROBLEM TO BE SOLVED: To provide a pretreatment apparatus for painting, which saves the space, improves the productivity, and greatly reduces costs of facilities and treating agents, the number of operating steps, and a burden of effluent treatment, even for a composite body of aluminum and iron. SOLUTION: This pretreatment apparatus comprises a treatment tank 101 that is filled with a treatment liquid for both degreasing and chemical conversion, containing at least a mixed solvent of a polar organic solvent and water which have a weight ratio of 2.8:7.2 to 3.8:6.2, sodium ions and/or lithium ions, phosphate ions, zinc ions, nickel ions, manganese ions, nitrate ions and/or nitrite ions, and in which an automotive body B is immersed; further a zone 300 for chemically conversion-coating aluminum by spraying a conversion coating solution for aluminum to the automotive body B, which is installed in the down stream of the treatment tank 101; and a rinsing tank 201 installed in the down stream of the chemical conversion coating zone 300, in which a cleaning solution is filled and the automotive body B is immersed. COPYRIGHT: (C)2004,JPO
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