Work

Flow-dependent effect of sub-yield elastic loading on the corrosion behavior of B10 CuNi alloy

Year: 2026

Type: article

Abstract: B10 Cu Ni alloy is commonly subjected to both flow and external loading during marine service, but the influence of sub-yield elastic strain on its corrosion behavior and its dependence on flow velocity remain unclear. Here, B10 Cu Ni alloy was exposed for 168 h to simulated seawater at flow velocities of 0–4 m/s under loading conditions of 0 and 200 MPa. Weight-loss measurements, electrochemical measurements, and surface analyses were combined to investigate its corrosion behavior. The results showed that sub-yield loading did not change the major corrosion-product types, but reduced film integrity and interfacial protection, leading to higher corrosion activity. Its corrosion-promoting effect exhibited a clear dependence on flow velocity: at low flow velocities, the effects of loading and flow were approximately additive, whereas their positive interaction became progressively stronger at high flow velocities. These results indicate that sub-yield elastic strain aggravates long-term corrosion damage mainly by weakening the protective performance of the corrosion product film, and that this effect increases with increasing flow velocity.

Source: Electrochemistry Communications

DOI: 10.1016/j.elecom.2026.108262