Abstract: A coating apparatus for the continuous manufacturing of steel strips coated with a varnish for electrical applications including a tank, a coating roll and an applicator roll wherein: the tank is able to contain a varnish solution and is configured such that the coating roll dips into the varnish solution, the applicator roll 4 is configured to be in contact with the coating roll 3 and the steel strip S, is configured to homogeneously coat the steel strip in the width of the steel strip and the surface of the applicator roll has a shore A hardness from 40 to 60.

Abstract: A method for depositing metallic coatings on a substrate including an annealing step, in an annealing furnace, forming on said substrate, a ferritic surface layer having a thickness from 10 ?m to 50 ?m and a microstructure comprising in surface fraction up to 10% of cumulated amount of martensite, bainite and the balance being made of ferrite, a skin pass step, a coating step, inside a vacuum chamber, wherein a metallic vapour is ejected towards at least a side of said substrate to form a surface layer of at least one metal.