HOT DIP METAL COATING METHOD AND METAL COATED MATERIAL OBTAINED BY THE METHOD

• Main Authors: KOGASHIWA NORIO, SUEHIRO ATSUO
• Format: Patent
• Language: English
• Published: 24.04.2001
• Edition: 7
• 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

PROBLEM TO BE SOLVED: To provide a method, capable of executing a hot dip galvanizing with high accuracy even to iron-base member having the projecting and the recessing pats, such as screw, and a galvanized material using this method. SOLUTION: The iron-base material is melted with zinc-tin alloy at the temperature 50-200 deg.C higher than the melting point of the zinc-tin alloy. The ratio of zinc and tin in the zinc-tin alloy is about zinc/tin = 30/70-90/10 weight ratio, and further, 0.0005-0.015 pt.wt. of aluminum to 100 pts.wt. of the total of zinc and tin, may be contained.