The influence of the chemical composition and type of alloy on corrosion performances of some medium strength Al-Mg-Si series of alloys

Delijić, Kemal; Markoli, Boštjan

doi:10.5937/metmateng1402131d

Cited by 3 publications

(4 citation statements)

References 10 publications

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“…Differences in OCPs of these alloys, in relation to Al99.7, were between 1-4 %. The exceptions were found for the AlMg0.65Si0.76Zr0.1 alloy in chloride solution where the difference is 14 % (about 100 mV) and for the AlMg4Zn1.3Mn0.4 sample immersed in natural water (about 9%, or 60mV) [24]. Figure 3 shows polarization curves of investigated alloys under potentiodynamic scanning conditions in synthetic seawater.…”

Section: Resultsmentioning

confidence: 98%

The Influence of the Chemical Composition on the Corrosion Performances of Some Al-Fe-Si, Al-Mg-Si and Al-Mg-Mn Type of Alloys

Delijić¹,

Markoli²,

Naglič³

2014

Metall Mater Eng

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Paper presents the results on the corrosion behavior of some Al-Fe-Si, Al-Mg-Si and Al-Mg-Mn alloys in their final commercially usable tempered state. Durability of alloys was quantified and compared in the sense of corrosion rates in aqueous solutions while also having in mind the role of alloy chemistry. Open circuit corrosion potential (OCP) measurements, linear polarization and potentiodynamic anodic/cathodic polarization was employed in order to determine the corrosion behavior of samples in the mixture of chloride ions containing aqueous corrosion ambient. We found out that AlFe0.83Si0.18(AA8079), AlMg0.63Si0.72 (AA6005) and AlMg4Mn (AA5182) alloy exhibited the highest rates of passivation in 0.51 mol NaCl solution. The group of Al-Fe-Si alloys exhibited the greatest sensitivity to the changes in chemical composition under potentiodynamic polarization. Artificially aged Al-Mg-Si extruded profiles and fully annealed (after cold rolling) Al-Mg-Mn sheets exhibit very similar levels of equilibrium potentials E (I=0) in 0.51 mol NaCl solution. In the case of Al-Fe-Si alloys, we found that Fe/Si ratio also plays an important role, next to the total content of Fe and Si. Alloys with high Fe/Si ratios showed almost 30 % lower polarization resistance compared to the alloys with balanced Fe/Si, even in the case of the equal total content of alloying elements. The AlMg0.7Si1.2Mn0.8 alloy aged after quenching in the sprayed water and AlMg4Zn1.3Mn0.4 annealed sheet exhibit very similar levels of corrosion rates in 0.51 mol NaCl solution.

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Section: Resultsmentioning

confidence: 98%

The Influence of the Chemical Composition on the Corrosion Performances of Some Al-Fe-Si, Al-Mg-Si and Al-Mg-Mn Type of Alloys

Delijić¹,

Markoli²,

Naglič³

2014

Metall Mater Eng

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“…The activity of the ions increases obviously with the decrease in the bounding force of the atoms. Alloying elements also have an effect on the diffusion behavior of the atoms in matrix [17,24]. The migration speed of Li ions is very high because of their high chemical activity and the higher the diffusion coefficient in liquid Al-Li alloys [25].…”

Section: Influence Mechanism Of Lithium On Diffusion Reaction Layermentioning

confidence: 99%

“…Therefore, it is of great theoretical and practical value to study the corrosion behavior of titanium alloy in aluminum-lithium alloy melt. So far, many researchers [15][16][17] have shown that the chemical composition of aluminum alloy melt has a great influence on its corrosion ability. However, there is a lack of research work about the effect of lithium on the dissolution of titanium in aluminum alloy melt, and the evolution and growth law of the diffusion reaction layer (DRL) at the solid-liquid interface.…”

Section: Introductionmentioning

confidence: 99%

Corrosion Behavior of TC4 Titanium Alloys in Al–Li Alloy Melt

Wang

Yan

et al. 2021

Metals

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The influences of Li content on the corrosion behavior of TC4 (Ti6Al4V) titanium alloy were explored when the TC4 titanium alloy was immersed in Al–Li alloy melt containing 0%, 1%, and 2% lithium at 680 °C, 700 °C, and 720 °C for 0.5 h, 1 h, and 2 h. The structure and growth law of the diffusion reaction layer at solid–liquid interface were studied, and the growth kinetic equation of the diffusion reaction layer was established. In addition, Ti content in Al–Li alloy melt was determined and its dissolution rate was calculated. The results showed that with the increase of lithium content in the melt, the thickness of the diffusion reaction layer (DRL) between TC4 titanium alloy and the melt increased significantly, and the activation energies of the diffusion reaction obtained were 141.28 kJ·mol−1 in liquid Al, 86.62 kJ·mol−1 in liquid Al–1Li alloy, and 43.42 kJ·mol−1 in liquid Al–2Li alloy, respectively. The dissolution rate of Ti in Al–Li alloy melts increased with the increase of lithium content in melts. When the holding time reached 3 h in a TC4 crucible, the content of Ti dissolved in the Al–2Li alloy melt was 0.105 wt%.

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“…Aluminum alloys are widely used in aerospace due to their low density, high cost-effectiveness, and excellent thermal/electrical conductivity [ 1 , 2 ]. However, the processing of aluminum alloys requires a high cutting force and heat dissipation, given their high viscosity and severe plastic deformations, and results in a degraded accuracy and surface quality of the processed surfaces [ 3 , 4 ]. In ultrasonic-assisted milling, high-frequency ultrasonic vibrations are applied to process tools or components after the amplitude amplification by the ultrasonic horn, while residual materials are readily removed by ultrasonic waves due to their high and concentrated energy and high impacts [ 5 , 6 ].…”

Section: Introductionmentioning

confidence: 99%

Microstructure of High-Performance Aluminum Alloy Surface Processed by the Single-Excitation Same-Frequency Longitudinal–Torsional Coupled Ultrasonic Vibration Milling

et al. 2018

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The high performance of parts is determined by the microstructure of the machined surface to some extent. Different processing methods have been used to construct different microstructures on machined surfaces; the effective improvement of the serviceability of parts has been the focus of research in the field of precision and ultra-precision machining. In the presented work, a microscratch was formed on the machined surface in ultrasonic assisted machining, and the surface microstructure of high-performance aluminum alloy processed by single-excitation rotational longitudinal–torsional coupled ultrasonic vibration (LTCUV) milling was investigated. First, the motion paths model of the cutting edge in the LTCUV milling were established; then, the single-excitation LTCUV milling system has been set up, and the acoustic performance of the LTCUV system was examined. The surface microstructure of aluminum alloy was processed by different machining techniques, and the effect of processing parameters on the surface microstructure and performance were investigated by the orthogonal design of experiment (DOE). The surface roughness was found to be proportional to the ultrasonic cutting speed and feeding rate. The surface roughness was mainly controlled by the ultrasonic amplitude, and the optimal surface quality corresponded to the ultrasonic amplitude of 4 μm. The cutting speed contributes greatly to the surface roughness. The water contact angle of surfaces obtained by ultrasonic processing was larger than that of surfaces achieved by the conventional processing, while the surface water contact angle was negatively related to the ultrasonic amplitude. Once the rotation speed exceeded a critical level, the ultrasonic amplitude exerted a negligible effect on the surface water contact angle. The cutting speed contributes the most to the water contact angle. The friction coefficients of surfaces treated by ultrasonic processing were lower than those obtained by conventional processing at constant processing parameters, while the friction coefficient was minimized at the ultrasonic amplitude of 4 μm. In the case of grease lubrication friction, the surface wear decreased with the ultrasonic amplitude, indicating the improved wear resistance of the processed surfaces. Similarly, the ultrasonic amplitude has the highest contribution rate to friction and wear.

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The influence of the chemical composition and type of alloy on corrosion performances of some medium strength Al-Mg-Si series of alloys

Cited by 3 publications

References 10 publications

The Influence of the Chemical Composition on the Corrosion Performances of Some Al-Fe-Si, Al-Mg-Si and Al-Mg-Mn Type of Alloys

The Influence of the Chemical Composition on the Corrosion Performances of Some Al-Fe-Si, Al-Mg-Si and Al-Mg-Mn Type of Alloys

Corrosion Behavior of TC4 Titanium Alloys in Al–Li Alloy Melt

Microstructure of High-Performance Aluminum Alloy Surface Processed by the Single-Excitation Same-Frequency Longitudinal–Torsional Coupled Ultrasonic Vibration Milling

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