Surface-treated metal material and joint body

By forming a silane film on the surface of a metal substrate and optimizing the surface roughness, the problem of reduced bond strength in high-temperature and humid environments was solved, achieving excellent bond strength and durability.

CN121057652BActive Publication Date: 2026-06-09KOBE STEEL LTD
5 Cites 0 Cited by

Patent Information

Application Number
CN202480030634.3
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Priority Date
2024-02-14
Filing Date
2024-04-30
Publication Date
2026-06-09
Estimated Expiration
2044-04-30

AI Technical Summary

Technical Problem

Existing technologies have insufficient reliability in bonding strength under long-term use, especially under the combined effects of high temperature, high humidity and stress such as fatigue or creep, the bonding strength is significantly reduced, leading to metal surface corrosion and interface peeling.

Method used

A silane film is formed on the surface of a metal substrate. The absorption spectrum and surface roughness are measured by Fourier transform infrared spectroscopy to ensure that the silane film has an absorption peak in the wavenumber region above 1250 cm⁻¹ and below 1150 cm⁻¹, and the surface roughness aspect ratio is above 0.5, thus forming an excellent adhesive resin layer to improve the bonding strength and durability.

Benefits of technology

It achieves stable and durable bonding strength in high-temperature and humid environments, avoids metal surface corrosion and interface delamination, and improves the adhesion and corrosion resistance of the adhesive to the metal.

✦ Generated by Eureka AI based on patent content.
Patent Text Reader

Abstract

Provided is a surface-treated metal material and a bonded body containing the same, for adhesive bonding, which can further improve adhesive durability. A surface-treated metal material in which a silane film is provided on at least a part of the surface of a metal substrate, wherein when a parallel polarized light having an incident angle of 75° is incident on the surface of the silane film, and an absorption spectrum is measured by Fourier transform infrared spectroscopy, an absorption peak is present in a wave number region of 1250 (cm －1 ) or more and 1150 (cm －1 ) or less, and when the surface roughness is measured for a 1 mm x 1 mm measurement range at any three positions on the surface of the silane film by a laser microscope, the aspect ratio is 0.5 or more.
Need to check novelty before this filing date? Find Prior Art