Controlled fabrication and electrochemical corrosion behavior of ultrathin Ni-Cu alloy foil

Yu, Linping; Chen, Long; Chen, Qizhi; Feng, Luli; Xu, Ziyi; Nan, Bo; Kang, Xiyue; He, Yuehui

doi:10.1016/j.jiec.2021.07.025

Cited by 5 publications

(1 citation statement)

References 31 publications

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“…Therefore, it is of great significance to clarify the corrosion process of Cu–Ni alloy based welded joints in pipelines from the electrochemical viewpoint 15 , 23 – 25 . Several studies have been carried out to understand the corrosion behavior of Cu/Ni alloys 26 – 28 . For example, Hodgkiess et al have studied the corrosion resistance of Cu/Ni alloy in saltwater and demonstrated that the Cu/Ni alloy possesses high resistance to mechanical erosion 29 and inferior stability towards galvanic corrosion.…”

Section: Introductionmentioning

confidence: 99%

Multiscale characterization of seawater pipe erosion of B10 copper–nickel alloy welded joints

Zhang

Liu

et al. 2022

Sci Rep

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In seawater pipeline, the welding joint is a non-uniform structure composed of welding seam, base metal and heat affected zone. It has inhomogeneity in chemical composition, organizational structure, residual stress, etc. As local defects and high turbulence accelerate corrosion, the welding joint is often the weakest link in pipeline corrosion. Herein, the electrochemical corrosion behavior of B10 alloy welded joint in flowing seawater is studied from macroscopic and submicroscopic viewpoints using AC impedance, linear polarization, array electrode and morphological characterization. The results reveal that the corrosion rate of weld metal (WM), base metal (BM) and heat-affected zone (HAZ) decreased with the increase of time. Combined with SEM and EDS analysis, it can be seen that the increase in time led to the decomposition and accumulation of corrosion products, which gradually enhanced the corrosion resistance of welded joints. At the submicroscopic scale, WM acts as a cathode to mitigate corrosion during the later stages of high flow rate.

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