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Corrosion of magnesium alloy ZE41 – The role of microstructural features
journal contribution
posted on 2009-02-01, 00:00 authored by W Neil, Maria ForsythMaria Forsyth, Patrick HowlettPatrick Howlett, C Hutchinson, Bruce HintonBruce HintonMagnesium alloy ZE41, used extensively in the aerospace industry, possesses excellent mechanical properties albeit poor corrosion resistance. This paper investigates the mechanism of corrosion and the interaction between the grain boundary intermetallic phases, the Zr-rich regions within the grains and the bulk Mg-rich matrix. The results of optical and scanning electron microscopy (SEM) together with energy-dispersive X-ray (EDX) and atomic force microscopy (AFM) potential map measurements have shown the importance of the microstructure in the initiation and propagation of corrosion in an aqueous environment, indicating that the Zr-rich regions play a distinct role in the early stages of corrosion in this alloy.
History
Journal
Corrosion scienceVolume
51Issue
2Pagination
387 - 394Publisher
ElsevierLocation
Amsterdam, The NetherlandsPublisher DOI
ISSN
0010-938XeISSN
1879-0496Language
engPublication classification
C1.1 Refereed article in a scholarly journalCopyright notice
2008, ElsevierUsage metrics
Keywords
A. magnesiumA. zirconiumB. SEMC. pitting corrosionScience & TechnologyTechnologyMaterials Science, MultidisciplinaryMetallurgy & Metallurgical EngineeringMaterials ScienceMagnesiumZirconiumSEMPitting corrosionELECTROCHEMICAL-BEHAVIORCONVERSION COATINGSMG-ZNAZ91DRESISTANCEPHASESYSTEMAZ31Mechanical Engineering
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