ORGANICALLY COATED STEEL SHEET EXCELLENT IN CORROSION RESISTANCE,申请号JP19970345869-传众专利搜索

ORGANICALLY COATED STEEL SHEET EXCELLENT IN CORROSION RESISTANCE

申请公布号：JPH11158646(A)

申请号：JP19970345869

申请日期：1997.12.01

申请公布日期：1999.06.15

申请人：

NKK CORP

发明人：YOSHIMI NAOTO;SASAKI KENICHI;SUGIMOTO YOSHIHARU;SAGIYAMA MASARU

分类号：C23C22/00;B05D7/14;C09D125/18;(IPC1-7):C23C22/00

主分类号：C23C22/00

摘要：PROBLEM TO BE SOLVED: To improve corrosion resistance without incorporating hexavalent Cr into a coating film by forming a polymer chelating agent-base coating film in a specified thickness on the surface of a Zn or Al plated steel sheet and forming an org. resin coating film or an org. composite silicate coating film on the polymer chelating agent-base coating film. SOLUTION: The thickness of the polymer chelating agent-base coating film is 0.01-5μm. The polymer chelating agent is, e.g. a chelating agent having alkylenephosphoric acid groups as N-substituents bonded to N atoms of a polyamino compd. obtd. by copolymerizing polyamines with a compd. represented by the formula, wherein X is epoxy or CHO, Y is S, O or N-R' (R' is 1-4C alkyl), Z is epoxy, CHO or H, R1 and R2 are each H or 1-60C alkyl, R1 and R2 may be the same or different, (n) is an integer of 0-5 and (m) is a positive integer.