Microstructures, corrosion behavior and mechanical properties of as-cast Mg-6Zn-2X(Fe/Cu/Ni) alloys for plugging tool applications

Mg-6Zn-2X(Fe/Cu/Ni) alloys were prepared through semi-continuous casting, with the aim of identifying a degradable magnesium (Mg) alloy suitable for use in fracturing balls. A comparative analysis was conducted to assess the impacts of adding Cu and Ni, which result in finer grains and the formation...

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Bibliographic Details
Published in:International journal of minerals, metallurgy and materials metallurgy and materials, 2024-04, Vol.31 (4), p.697-711
Main Authors: Liu, Baosheng, Wei, Jiali, Zhang, Shaohua, Zhang, Yuezhong, Wu, Pengpeng, Fang, Daqing, Ma, Guorui
Format: Article
Language:English
Subjects:
Alloys
Ceramics
Characterization and Evaluation of Materials
Chemistry and Materials Science
Composites
Compressive strength
Continuous casting
Copper
Corrosion
Corrosion and Coatings
Corrosion mechanisms
Corrosion rate
Corrosion tests
Electrolytes
Fracturing
Galvanic corrosion
Glass
Grain boundaries
Hydraulic fracturing
Hydrogen
Iron
Magnesium
Magnesium base alloys
Materials Science
Materials selection
Mechanical properties
Mechanical tests
Metallic Materials
Microscopy
Natural Materials
Nickel
Pitting (corrosion)
R&D
Rare earth elements
Research & development
Research Article
Surfaces and Interfaces
Thin Films
Tribology
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Summary:Mg-6Zn-2X(Fe/Cu/Ni) alloys were prepared through semi-continuous casting, with the aim of identifying a degradable magnesium (Mg) alloy suitable for use in fracturing balls. A comparative analysis was conducted to assess the impacts of adding Cu and Ni, which result in finer grains and the formation of galvanic corrosion sites. Scanner electronic microscopy examination revealed that precipitated phases concentrated at grain boundaries, forming a semi-continuous network structure that facilitated corrosion penetration in Mg-6Zn-2Cu and Mg-6Zn-2Ni alloys. Pitting corrosion was observed in Mg-6Zn-2Fe, while galvanic corrosion was identified as the primary mechanism in Mg-6Zn-2Cu and Mg-6Zn-2Ni alloys. Among the tests, the Mg-6Zn-2Ni alloy exhibited the highest corrosion rate (approximately 932.9 mm/a) due to its significant potential difference. Mechanical testing showed that Mg-6Zn-2Ni alloy possessed suitable ultimate compressive strength, making it a potential candidate material for degradable fracturing balls, effectively addressing the challenges of balancing strength and degradation rate in fracturing applications.
ISSN:1674-4799
1869-103X
DOI:10.1007/s12613-023-2775-6