| abstract |
An object of the present invention is to provide a coating pretreatment apparatus capable of achieving a space saving, an improvement in productivity, and a significant reduction in equipment costs, chemical costs, management man-hours, and wastewater treatment load even for a composite body of iron and aluminum. A mixed solvent of a polar organic solvent and water having a weight ratio of 2.8: 7.2 to 3.8: 6.2, sodium ion and / or lithium ion, phosphate ion, zinc ion, nickel A treatment tank 101 filled with a degreasing and chemical conversion treatment liquid containing at least ions, manganese ions, nitrate ions and / or nitrite ions and in which the car body 9 is immersed; An aluminum chemical treatment zone 300 for spraying a chemical conversion treatment solution for aluminum onto the aluminum, a rinsing tank 201 provided at a subsequent stage of the aluminum chemical treatment zone 300 and filled with a cleaning liquid and immersed in the vehicle body 9, and a rotary drive for rotating the vehicle body 9 The apparatus is provided with a vehicle body transfer device C having an apparatus 90, and is rotated with respect to the processing tank 101 and the rinsing tank 201 so that an inlet / outlet tank is provided. Cormorant. [Selection diagram] Fig. 1 |