SURFACE MODIFYING METHOD FOR GALVANIZED STEEL SHEET AND SURFACE MODIFIED GALVANIZED STEEL SHEET BY THEREOF
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United States of America Patent
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Issued Date -
Sep 28, 2023
app pub date -
Aug 24, 2021
filing date -
Sep 8, 2020
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Abstract
A galvanized steel sheet according to one aspect of the present invention comprises: a base steel sheet; and a Zn-Al-Mg-based plating layer provided on at least one surface of the base steel sheet, wherein the Zn-Al-Mg-based plating layer may include a surface modified region enriched with cerium (Ce) on a surface layer side of the Zn-Al-Mg-based plating layer.
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