METHOD FOR PRODUCING A METAL SHEET HAVING ZN-AL-MG COATINGS, COMPRISING THE APPLICATION OF AN ACID SURFACE TREATMENT SOLUTION, AND CORRESPONDING METAL SHEET

摘要

The method comprises at least the following steps: providing a steel substrate (3) having two faces (5), depositing a metal coating (7) on each face (5) by quenching the substrate (3) in a hot bath, cooling the metal coatings (7), and performing a surface treatment by applying an acid surface treatment solution on the outer surfaces (15) of the metal coatings (7).