Weldable, prepainted metal sheet and process for making it.

摘要

Prepainted sheet metal consists of a metal substrate(1) coated on one face with a layer of organic paint(2) loaded with magnetic and electrically conducting particles(3), of elongated shape oriented perpendicular to the surface. Also claimed is the prodn. process of coating the metal substrate with the particle loaded paint and subjecting it to a perpendicular magnetic field to orient the particles while the paint is still liquid. The paint is then cured while maintaining the magnetic field. The particles are magnetic iron, nickel or iron phosphate at loadings of 30-95% in the cured paint. They are the same length as the paint thickness. The substrate is anti corrosion coated (1b) iron (1), aluminium or aluminium alloy. <IMAGE>