Metal sheet with a ZnAl coating

Abstract

The present invention provides a method for manufacturing a metal sheet. In this method, at least one of the following equations is satisfied: Z d + 18 ⁢ ⁢ ln ⁡ ( Z d ) < 8 ⁢ ⁢ ln ⁡ ( P V ) - 27.52 ( A ) fO 2 < 2.304 · 10 - 3 ( 27.52 + Z d + 8 ⁢ ⁢ ln ⁡ ( V P ⁢ ( Z d ) 2.25 ) ) 2 ( B ) wherein: Z is the distance between the metal sheet and the nozzle along the main ejection direction (E), Z being expressed in mm, d is the average height of the outlet of the nozzle along with the running direction of the metal sheet in front of the nozzle, d being expressed in mm, V is the running speed of the metal sheet in front of the nozzle, V being expressed in m·s−1, P is the pressure of the wiping gas in the nozzle, P being expressed in N·m−2, and fO2 is the volume fraction of oxygen in the wiping gas. A metal sheet, part and land motor vehicle are also provided.

Dependencies are inferred from the claim text.