Copper-plated steel sheet
EP4729664A1Pending Publication Date: 2026-04-22NIPPON STEEL CORPORATION
Patent Information
- Authority / Receiving Office
- EP · EP
- Patent Type
- Applications
- Current Assignee / Owner
- NIPPON STEEL CORPORATION
- Filing Date
- 2024-11-20
- Publication Date
- 2026-04-22
AI Technical Summary
Technical Problem
Copper-plated steel sheets face issues with coated films peeling off due to insufficient adhesion, especially under high loads or high-temperature conditions, and existing solutions are costly or lack durability.
Method used
A copper-plated steel sheet with a dendritic copper plated film having a lightness L* of 50 to 71, formed by alternating low and high flow velocities in copper sulfate plating, enhances adhesion by creating dendritic protrusions that act as anchors for the coated film.
Benefits of technology
The dendritic copper plated film provides excellent adhesion, preventing coated films from peeling off even under large applied loads and maintaining slidability, while being cost-effective.
✦ Generated by Eureka AI based on patent content.
Smart Images
Figure IMGAF001_ABST
Abstract
A copper-plated steel sheet 10 includes a base steel sheet 20 and a dendritic copper plated film 30 formed on at least one surface of the base steel sheet 20. The copper plated film 30 has a lightness L* of 50 to 71, as measured within 1 hour after immersing the copper-plated steel sheet 10 in 0.5% by mass of dilute sulfuric acid at 25°C for 5 seconds, washing the copper-plated steel sheet 10 with water and drying it.
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Citation Information
Patent Citations
Sliding member and production method of sliding member
JP2018197387A