MANUFACTURING METHOD OF PLATED STEEL SHEET EXCELLENT IN CORROSION RESISTANCE AND COATING MATERIAL ADHESION

摘要

PROBLEM TO BE SOLVED: To provide a method for manufacturing a plated steel sheet which has sufficient film performance and thereby is excellent in corrosion resistance and coating material adhesion, in the manufacturing method of the plated steel sheet by which a non-chromate rust-preventive treatment liquid is applied on the plated steel sheet and then rapid heating is executed by using near IR rays.;SOLUTION: The manufacturing method of the plated steel sheet which is excellent in corrosion resistance and coating material adhesion is characterized in that formula; 5(PMT-Tg)²/α 100 is satisfied when the rust-preventive treatment liquid containing a water soluble resin is applied on a surface of the plated steel sheet and then the surface is irradiated with near IR rays having 0.8 to 1.5 μm peak wavelength of radiation energy to heat the plated steel sheet at 50 to 200°C/sec temperature rising rate to form a coating film, wherein PMT represents steel plate reaching temperature (°C), Tg represents glass transition temperature of the water soluble resin (°C), α represents a temperature rising rate (°C/sec).;COPYRIGHT: (C)2009,JPO&INPIT