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US 2024/0052519 A1Published application
Composite steel sheet having excellent adhesiveness, and manufacturing method therefor
AssigneePosco
InventorsHye-Jin Yoo, Chang-Se Byeon, Jung-Su Kim, Je-Hoon Baek, Kang-Min Lee
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Abstract
The present invention relates to a composite steel sheet having excellent adhesiveness, and a manufacturing method therefor, and, more particularly, to a light composite steel sheet obtained by forming microstructures on the surface and inside of a plated steel sheet, and then bonding same with a plastic layer to maximize adhesiveness.
Claims11
A composite steel sheet comprising:
- a base steel;
- a plating layer provided on at least one surface of the base steel;
- and
- a resin layer provided on the plating layer,
- wherein an interface roughness Ra between the plating layer and the resin layer is 0.5 to 1.5 μm,
- the plating layer has pores therein, and
- the pores present in the plating layer have an average diameter of 10 nm to 3 μm.
4 more elements
A method for manufacturing a composite steel sheet comprising:
- obtaining a plated steel sheet by forming a plating layer on at least one surface of a base steel;
- performing a primary electrolytic etching treatment on the plated steel sheet by using a primary electrolyte solution containing one or more selected from the group consisting of HCl and NaCl;
- performing a secondary electrolytic etching process on the plated steel sheet subjected to the primary electrolytic etching process by using a secondary electrolyte solution containing one or more selected from the group consisting of HNO3, NaOH, H3PO4, H2SO4, Na2SO4, and NaH2PO4;
- and
- performing thermal fusion of a resin sheet on the plated steel sheet subjected to the secondary electrolytic etching process.
2 more elements
Dependencies are inferred from the claim text.