A long-term corrosion barrier with an insulating boron nitride monolayer
By Liting Shen, Yuda Zhao, Yi Wang, Ruobing Song, Q. Yao, Shanshan Chen, Yang Chai. 2016
147 citations recorded by the source corpus.
Graphene has been demonstrated as an ultrathin and light-weight corrosion barrier because of its high impermeability. However, it fails to prevent the Cu corrosion over a long term because the high conductivity of graphene enables the formation of a galvanic cell and promotes the electrochemical reaction. Here we theoretically and experimentally study a boron nitride (BN) monolayer as a long-term corrosion barrier for Cu. Our density functional theory calculations show that the potential barrier for O2 to pass through BN is close to that of graphene. The long-term barrier characteristics of BN and graphene are comparably evaluated by aging in an ambient environment for 160 days. Morphological and spectroscopic characterization shows that a BN monolayer has much better long-term barrier performance than graphene. X-ray photoelectron spectroscopy analysis shows that the Cu2+ percentage of the aging Cu sample with a BN barrier is reduced by around 15 times compared with that covered by graphene. The superior long-term barrier performance of a BN monolayer can be understood to be a result of its high impermeability and insulating characteristics, which suppress the galvanic corrosion under the ambient environment. These studies reveal that a BN monolayer is a more effective long-term corrosion barrier than graphene.
Subfields: Electrical and Electronic Engineering, Materials Chemistry
View Paper: https://www.semanticscholar.org/paper/19b83af17bc3d1df24d9610b7016f89b0977cdd3
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In Electrical and Electronic Engineering
In Materials Chemistry
Citations in the corpus
- Effect of Humidity on Friction and Wear—A Critical Review (2018, background): “At low load conditions where mechanical damage could be prevented, wear of silicate glass surfaces occurs via mechanochemical processes [179,180].”
- Multifunctional epoxy nanocomposites reinforced by two-dimensional materials: A review (2021, background): “In addition, its electrical insulating nature makes BN more suitable as long-term barrier material compared to graphene, since conductive graphene may introduce galvanic corrosion phenomena [32].”