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Erschienen in: Journal of Materials Engineering and Performance 10/2021

14.06.2021

Improvement of Corrosion and Wear Resistance of Ni-W Coatings by Embedding Graphene Oxide Modified by Nano-Al2O3

verfasst von: Zhang Guosong, Cui Hongzhi, Song Xiaojie, Tian Shuichang, Su Chunjian

Erschienen in: Journal of Materials Engineering and Performance | Ausgabe 10/2021

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Abstract

Graphene oxide (GO) easily aggregates due to the cross-linking between divalent cations in the plating baths, and the presence of reduced GO in metal coatings promotes corrosion. This paper aims to improve the corrosion and wear resistance of Ni-W coatings by embedding graphene oxide modified with nano-Al2O3 nanoparticles (Al2O3@GO). Carboxylic acid groups were removed to eliminate cross-linking with divalent cations. Moreover, the increased number of hydroxyl groups ensured that Al2O3@GO was highly dispersed in the plating bath. Then, Ni-W-Al2O3@GO coatings were fabricated by pulse electrodeposition with different Al2O3@GO concentrations in the plating solution. The grain refinement, low number of defects, and low conductivity (1.31 Sm−1) of the reduced Al2O3@GO in the coating gave it anti-corrosion properties. The coating with 1 g L−1 of GO addition (Icorr = 0.195 μA) displayed better corrosion and wear resistance properties than Ni-W coating (Icorr = 6.66 μA), Ni-W-GO coating (Icorr = 0.706 μA), and other Ni-W-Al2O3@GO coatings. The uniform distribution of Al2O3@GO in the coatings allowed it to serve as a physical barrier which eliminated electron pathways and prevented the infiltration of corrosive media. Moreover, the self-lubrication and similar “rolling” of Al2O3@GO increased the wear resistance of the coatings.

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Metadaten
Titel
Improvement of Corrosion and Wear Resistance of Ni-W Coatings by Embedding Graphene Oxide Modified by Nano-Al2O3
verfasst von
Zhang Guosong
Cui Hongzhi
Song Xiaojie
Tian Shuichang
Su Chunjian
Publikationsdatum
14.06.2021
Verlag
Springer US
Erschienen in
Journal of Materials Engineering and Performance / Ausgabe 10/2021
Print ISSN: 1059-9495
Elektronische ISSN: 1544-1024
DOI
https://doi.org/10.1007/s11665-021-05958-z

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