PROBLEM TO BE SOLVED: To provide a passivation processing device capable of easily and reliably passivating a treated product.SOLUTION: The passivation processing device comprises: a treatment tank 2, in which treatment liquid is stored and a treated product is immersed pressure-reduction means 5 for reducing pressure in the treatment tank 2 by sucking a discharging gas in the treatment tank 2 to outside pressure-restoring means 6, 4 for introducing the gas in the pressure-reduced treatment tank 2, and restoring the pressure in the treatment tank 2 and control means for passivating the treated product by controlling each means. The control means executes an operation for restoring a pressure in the treatment tank 2 by the pressure-restoring means 6, 4 after the pressure in the treatment tank 2 is reduced by the pressure-reduction means 5. When the pressure in the treatment tank 2 is reduced, it is preferably that the treatment liquid is boiled, and air is fed to a gas-phase part or a liquid-phase part to restore the pressure during boiling.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2018,JPO&INPIT【課題】被処理物を容易に確実に不動態化処理できる不動態化処理装置を提供する。【解決手段】処理液を貯留して被処理物が浸漬される処理槽2と、処理槽2内の気体を外部へ吸引排出して処理槽2内を減圧する減圧手段5と、減圧された処理槽2内へ気体を導入して処理槽2内を復圧する復圧手段6,4と、前記各手段を制御して被処理物を不動態化処理する制御手段とを備える。制御手段は、減圧手段5により処理槽2内を減圧した後、復圧手段6,4により処理槽2内を復圧する動作を実行する。処理槽2内の減圧時、処理液を沸騰させ、その沸騰中に、気相部または液相部に給気して復圧するのが好ましい。【選択図】図1
