SURFACE-TREATED STEEL SHEET AND METHOD OF PRODUCING SAME
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United States of America
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Issued Date -
Jan 30, 2025
app pub date -
Feb 20, 2023
filing date -
Feb 20, 2023
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Abstract
Provided is a surface-treated steel sheet that can be produced without using hexavalent chromium and is excellent in adhesion to BPA-free paint and BPA-free painting corrosion resistance. A surface-treated steel sheet comprises: a steel sheet; a metallic Cr layer disposed on a surface of the steel sheet on at least one side; and a Cr oxide layer disposed on the metallic Cr layer, wherein a contact angle of ethylene glycol is 50° or less, and a total atomic ratio of K, Na, Mg, and Ca adsorbed on a surface of the surface-treated steel sheet on the at least one side to Cr is 5.0% or less.
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