Method for manufacturing a metal sheet with a znal coating and with optimized wiping, corresponding metal sheet, part and vehicle

A method for manufacturing a coated metal sheet comprising a steel substrate, at least one face of which is coated, the method comprising the steps of:

• cold rolling the steel substrate with rolls for at the least a last pass of the cold rolling that are rectified and non-etched work rolls for which work surfaces have a roughness Ra2.5 of less than or equal to 0.5 μm;
• depositing a metal coating on the at least one face of the steel substrate by dipping the steel substrate in a bath to obtain the coated metal sheet;
• wiping the metal coating with a wiping gas;
• and
• solidifying the metal coating, an outer surface of the metal coating having, after solidification and before any skin-pass operation, a waviness Wa0.8 of less than or equal to 0.55 μm, the metal coating comprising Al, a remainder of the metal coating being Zn and inevitable impurities, the metal coating having a weight content of aluminum from 0.2 to 0.7%.