The role of discontinuous precipitation in the corrosion process of Cu-Ni-Si alloys: Rebar and firewall effects

Release time:2026-09-11

Impact Factor:10.3

DOI number:10.1016/j.corsci.2025.113181

Affiliation of Author(s):中南大学材料科学与工程学院

Journal:Corrosion Science

Key Words:Cu-Ni-Si

Abstract:It is conventionally believed that discontinuous precipitation exacerbates alloy corrosion, but its corrosion behavior remains unclear. This work investigates the influence of discontinuous precipitation on the corrosion behavior of a Cu-5.0Ni-1.2Si alloy through microstructural characterization and electrochemical testing. The results demonstrate that fibrous δ-Ni₂Si discontinuous precipitation forms after 4 h of aging at 450°C, occupies approximately half of the microstructure by 8 h, and nearly fully dominates the alloy after 12 h.

Co-author:Xiao Tong, Li Linhan, Liao Xianfeng, Xiao Zhu, Li Zhou, Jia Yanlin

First Author:Ren Kalubi

Discipline:Engineering

First-Level Discipline:Materials Science and Engineering

Volume:256

Page Number:113181

ISSN No.:0010-938X

Translation or Not:no

Date of Publication:2025-11-01