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RESEARCH PRODUCT
Effect of silicon on corrosion resistance of Ti–Si alloys
Hugh MiddletonZhonglin JiangZhonglin JiangXin Daisubject
Materials scienceSiliconMechanical EngineeringAlloyMetallurgyPassivitychemistry.chemical_elementengineering.materialCondensed Matter PhysicsCorrosionX-ray photoelectron spectroscopyChemical engineeringchemistryMechanics of MaterialsengineeringGeneral Materials ScienceGrain boundarydescription
Abstract The corrosion resistance of Ti–Si alloys has been studied in acid solutions and the alloys exhibit a high resistance to corrosion. SEM examinations combined with EDAX allowed to conclude that the passive films on Ti–Si alloys are mainly composed of TiO 2 /SiO 2 oxides. XPS analysis indicated the formation of Si–O and Si–O–Ti bonds in the passive film, respectively corresponding to SiO 2 and Si-doping TiO 2 . The effect of silicon on the corrosion was correlated to the formation of a stable SiO 2 film, Si-doping on TiO 2 and the extended lattice imperfections formed along TiO 2 /SiO 2 grain boundaries and phase-boundaries. The calculated donor densities based on the point defect model were shown to depend exponentially on pH and linearly on potential.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2011-01-01 | Materials Science and Engineering: B |