公开(公告)号：JPH0847666A

公开(公告)日：1996-02-20

申请号：JP5705895

申请日：1995-03-16

Applicant: BASF AG

Inventor： HAARARUTO KERAA ,  GEERUHARUTO HOFUMAN ,  BUARUTAA DENTSUINGAA ,  RAINAA FUESURAA

IPC: B05D3/10 ,  B05D7/14 ,  C08L39/00 ,  C09D139/00 ,  C25D13/20

Abstract: PURPOSE: To improve adhesive property and corrosion resistant protection effect and reduce corrosion of an under layer of a coating by treating metal surface with an aqueous solution of an amino containing organic polymer in the case of performing modification treatment of cleaned or chemically pretreated metal surface with an organic polymer aqueous solution. CONSTITUTION: Cleaned or chemically pretreated metal surface is treated by an aqueous solution of an amino containing organic polymer and is coated with a thin layer of this polymer. Here, for the amino containing organic polymer, the one expressed by the formula is used. R , R in the formula can be same or different and each contains H or a unit meaning an alkyl with carbon atom number of 1-6, or a hydrolysis product of a polymer comprising this unit is used. Further, the modified metal surface is used for coating by cathodic electrodeposition. Consequently, adhesive property and corrosion resistant coating effect for the coating material are improved, and an under layer corrosion of the coating can be reduced.