Patent No. EP2906734 (titled "A Method For Manufacturing A Metal Sheet With A Znal Coating And With Optimised Drying, Corresponding Metal Sheet, Part And Vehicle") was filed by Arcelormittal on Feb 10, 2014. The application was issued on Jun 1, 2022.
A process for producing a steel sheet with a zinc-based coating having a controlled waviness profile. The process involves cold rolling the steel substrate with smooth working rolls to reduce the waviness of the coating's outer surface, characterized by an arithmetic mean waviness (Wa0.8) of less than 0.8 μm. The coating composition includes 0.2-0.7% aluminum by weight, with optional additional elements present in less than 0.3% by weight.

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