公开(公告)号：US20250051901A1

公开(公告)日：2025-02-13

申请号：US18625202

申请日：2024-04-03

Applicant: Feedback Technology Corp.

Inventor： Tsung Feng Wu ,  Chun-Chih Liao ,  Po-Chia Huang ,  Guo-Yang Ciou ,  Chia-Te Lin ,  Po-Han Chen

IPC: C23C8/12 ,  C22C19/05 ,  C22F1/10 ,  C23C8/02 ,  C23G1/20

Abstract: A method for the surface treatment of a corrosion-resistant nickel-based alloy and the resulting surface structure of the treated alloy is disclosed. The method includes immersing a nickel-based alloy in a first neutral or alkaline solution to remove surface contaminants, followed by immersing the cleaned alloy in a second neutral or alkaline solution to form functional groups on its surface. Subsequently, a low-temperature heat treatment is performed to form a passivation layer on the surface of the nickel-based alloy. The passivation layer has a surface roughness of less than 0.04 microns and a thickness ranging from 5 nanometers to 200 nanometers. The resulting corrosion-resistant nickel-based alloy comprises a substrate made of the nickel-based alloy and a passivation layer established on at least one surface of the substrate. The nickel content of the alloy is greater than 50%, and the alloy may also contain additional metallic components such as chromium (Cr) and manganese (Mn). The passivation layer may be a layer of nickel oxide, manganese oxide, chromium oxide, or a combination thereof.