Oberflächenbehandeltes Element und Verbundstruktur

Details

Veröffentlichungs-Nr.

EP4772674

Anmeldetag

19. August 2024

Veröffentlichung

6. März 2025

Rechtsraum

EP

Abstract

[SUMMARY][PROBLEM] To provide a surface-treated member using a zinc-based plated steel material capable of exhibiting excellent corrosion resistance even in concrete.[SOLUTION] In a surface-treated member of the present invention, an exposure region having a base steel exposure portion is present in at least part of a zinc-based plating layer, and when each cross section obtained by cutting the exposure region in a thickness direction of a steel material is observed with a microscope, a length in a width direction, of each of the base steel exposure portions present is within a range of 1 to 100 µm, the number of the base steel exposure portions present per unit length is within a range of 3 to 20/mm, and a total length in the width direction, of the base steel exposure portions per unit length is 600 µm/mm or less. Further, a total area of regions each giving a cross section where the total length in the width direction, of the base steel exposure portions, per unit length is 600 µm/mm or less in a plan view from above is 0.7% or more of a surface area of the steel material in a plan view.

Anmelder

Firma

Nippon Steel Corporation

Land

🇯🇵 Japan