SURFACE TREATING AGENT AND TREATING BATH FOR ALUMINUM OR ALUMINUM ALLOY

• Main Authors: MEGURO SHIGEYUKI, IKEDA SATORU
• Format: Patent
• Language: English
• Published: 19.03.1991
• Subjects: CHEMICAL SURFACE TREATMENT; CHEMISTRY; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING MATERIAL WITH METALLIC MATERIAL; COATING METALLIC MATERIAL; DIFFUSION TREATMENT OF METALLIC MATERIAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL; METALLURGY; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION

PURPOSE:To make it possible to obtain a tight adhesion of coating by incorporating specified pts.wt. of Zr ions, phosphate ions and available F ions per specified pts.wt. of ions of one or more kinds of metals such as Sc and Y. CONSTITUTION:Zr ions, phosphate ions and available F ions are incorporated into a surface treating agent for Al or Al alloy by 10-500 pts.wt., 10-500 pts.wt. and 1-50 pts.wt., respectively, per 10-1,000 pts.wt. ions of one or more kinds of metals selected among Sc, Y, La, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu. Even when a coating film is formed by a small amt., superior resistance to blackening by boiling water can be obtd.