Investigation of time-dependent corrosion behavior of Sr-modified AlSi12 alloy
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Gökçe Hapçı Aǧaoǧlu
,
İnal Kaan Duygun
Abstract
The effect of Sr addition on the microstructure and time-dependent corrosion properties of the AlSi12 eutectic alloy was investigated. The modified alloy contained 90 ± 3 ppm Sr. The microstructural differences in the eutectic structure of AlSi12 alloys were assessed in terms of the Si particle size and a-Al volume fraction. The unmodified and Sr-modified alloys were immersed for 1, 24, 72 and 120 h in 3.5 wt.% NaCl. Electrochemical impedance spectroscopy and potentiodynamic polarization techniques were performed to analyze the corrosion characteristics of the alloys. Sr addition led to a decrease in the Si particle size, and the formation of long dendritic a-Al. It was found that the presence of Sr resulted in more stable corrosion behavior up to 24 h. The deterioration of the corrosion behavior of Sr-modified alloy was observed with the further increase of immersion time.
© 2020 by Walter de Gruyter Berlin/Boston
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- Notifications
- DGM
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Artikel in diesem Heft
- CONTENTS
- Original Contributions
- Enthalpies of mixing in binary Cu–Eu and ternary Al–Cu–Eu liquid alloys
- The effect of Al2O3 on fayalite-based copper smelting slags in equilibrium with matte and tridymite at 1 2008C and P(SO2) = 0.25 atm
- Phase transformations during the oxidation of fayalite in iron-rich nickel slag
- Hot working of SP-700 titanium alloy with lamellar α + β starting structure using a processing map
- Phase transformations and microstructural evolution in nanocrystalline Fe71B23Nb6 alloy prepared by mechanical alloying
- Dynamic recrystallisation and modelling of microstructural evolution of high-titanium-content 6061 aluminium alloy
- High-strength wire + arc additive manufactured steel
- Effect of Al substitution for Ga on magnetostriction enhancement by annealing of as-cast Fe–Ga–Al alloys under low magnetic fields
- Investigation of time-dependent corrosion behavior of Sr-modified AlSi12 alloy
- Synthesis of LiCoO2 particles with tunable sizes by a urea-based-homogeneous-precipitation method
- Short Communications
- High temperature oxidation resistance of porous Ni–Cr–Fe materials
- Notifications
- DGM
- Conferences
- Imprint
