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1. 发明专利

JP2009132993A Degreasing pretreatment method and apparatus therefor 审中-公开
标题翻译：退火预处理方法及其设备
公开(公告)号：JP2009132993A
公开(公告)日：2009-06-18
申请号：JP2008229996
申请日：2008-09-08
申请人： Mazda Motor Corp , マツダ株式会社
发明人： KATSURA HIROSHI , SHIGENAGA TSUTOMU , ANDO AKIRA , OBARA SEIJI
IPC分类号： C23G5/00 , B05D3/10 , B05D7/00 , C25D13/20
摘要： PROBLEM TO BE SOLVED: To provide a degreasing pretreatment method which can prevent the decrease in corrosion resistance of the joint portion of the object to be treated.
SOLUTION: Prior to immersion of an object to be treated into a treatment liquid including a degreasing liquid, an aqueous solution 20 having a pH of 5.5 to 10.0 is put into a hemmed portion 2a of a vehicle body 2. Even when the vehicle body 2 is passed through the treatment liquid including the degreasing liquid, the aqueous solution 20 came into the hemmed portion 2a is not replaced with the treatment liquid including the degreasing liquid, and alkaline solid substances do not remain in the hemmed portion 2a. This prevents the water in the hemmed portion 2a from having the high alkalinity even when water comes into the hemmed portion 2a later.
COPYRIGHT: (C)2009,JPO&INPIT
摘要翻译：要解决的问题：提供一种可以防止待处理物体的接合部的耐腐蚀性降低的脱脂预处理方法。解决方案：在将待处理物体浸入包括脱脂液体的处理液体之前，将pH为5.5至10.0的水溶液20放入车体2的卷边部分2a中。即使当车身2通过包括脱脂液体的处理液体，进入卷边部分2a的水溶液20不被包含脱脂液体的处理液体代替，并且碱性固体物质不会残留在卷边部分2a中。这样，即使水稍后进入卷边部2a，也能够防止卷边部2a中的水具有高碱度。版权所有（C）2009，JPO＆INPIT

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