High stress corrosion cracking resistance of in-situ nanoparticle strengthened steel

Shi, Rongjian; Tu, Yanqi; Gao, Kewei; Li, Qiao; Pang, Xiaolu

doi:10.1016/j.corcom.2021.11.006

Cited by 9 publications

(1 citation statement)

References 40 publications

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“…In general, Cu-Ni alloys show acceptable performance in industrial environments, and they are believed to be Cl-resistant, especially when compared with other commonly used Cu alloys such as Cu-Sn and Cu-Zn alloys [5]. However, when serving as structural components, Cu-Ni alloys may experience stress corrosion cracking (SCC) when subject to the synergistic effects of stress and corrosion [6,7]. When served as heat exchangers, valves, compressor blades, etc., or other load-bearing components in corrosive environments, Cu-Ni alloys are prone to the gradual growth of cracks [8].…”

Section: Introductionmentioning

confidence: 99%

Stress Corrosion Cracking of Copper–Nickel Alloys: A Review

Li,

Gao

et al. 2023

Coatings

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Under the combination of certain corrosive ions and stress, Cu-Ni alloys may experience severe stress corrosion cracking (SCC), which causes premature failure and hinders their further applications as crucial construction materials in various engineering fields. To reveal the origin of such failure, minimize the related negative impacts, and achieve economic and social benefits, this review summarizes all SCC-related issues by making a brief introduction to Cu-Ni alloys, reporting the SCC behavior in various environments, identifying the effects of different factors during SCC, and revealing the SCC degradation mechanisms. S2− and NH4+ are the prominent SCC initiators since the former can combine with Cu+ to form Cu2S as a non-protective corrosion product, while the latter has a great tendency to react with Cu2O/Cu and accelerate the general or local dissolution. Their combination has the most detrimental effect. The SCC mechanisms of Cu-Ni alloys are summarized as film rupture theory and dealloying theory. The related SCC mitigation strategies, including using inhibitors, tailoring alloying elements, and removing/reducing the stress are also discussed. In addition, future directions are made at the end of this paper.

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