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PRETREATMENT FOR PAINTING BY CATIONIC ELECTRODEPOSITION
PRETREATMENT FOR PAINTING BY CATIONIC ELECTRODEPOSITION
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机译:阳离子电沉积彩涂的预处理
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摘要
PURPOSE:To improve the adhesion of a plate-shaped metallic structure to a paint film formed by cationic electrodeposition by immersing the structure in a phosphating soln. contg. essential components such as phosphate ions at a specified concn. each and further contg. Mn ions to form a phosphate film. CONSTITUTION:A phosphating soln. contg. 0.2-2.0g/l Mn ions besides F ions, phosphate (PO4) ions and 0.7-2.2g/l Zn ions and having 0.6-1.4 point free acidity (FA) is prepd. so as to satisfy (9-64):1 ratio of total F ions (g/l)Xphosphate ions (g/l):Zn ions (g/l) and (7-33):1 ratio of phosphate ions:Zn ions. A plate-shaped metallic structure composed essentially of a cold rolled steel sheet and an alloyed galvanized steel sheet is immersed in the phosphating soln. Ni ions may be added to the soln. as required. By this pretreatment, superior adhesion to a paint film formed by cationic electrodeposition can be provided to the structure.
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机译:用途:通过将结构浸入磷化溶液中,以提高板状金属结构对通过阳离子电沉积形成的涂膜的附着力。续基本成分,例如特定浓度的磷酸根离子。每个和进一步的竞争。 Mn离子形成磷酸盐膜。组成:磷化液。续除了F离子,磷酸根(PO4)离子和0.7-2.2g / l Zn离子外,还准备有0.2-2.0g / l Mn离子,并具有0.6-1.4点的游离酸度(FA)。以满足总F离子(g / l)X磷酸盐离子(g / l):Zn离子(g / l)的(9-64):1比例和磷酸盐离子:Zn的(7-33):1比例离子。将基本上由冷轧钢板和合金镀锌钢板组成的板状金属结构浸入磷化液中。可以将Ni离子添加到溶液中。按要求。通过该预处理,可以为该结构提供对通过阳离子电沉积形成的漆膜的优异粘附性。
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