Improved Corrosion Resistance of Magnesium Alloy with a Surface Aluminum Coating Electrodeposited in Ionic Liquid

Chang, Jeng‐Kuei; Chen, Su Yau; Tsai, Wen Ta; Deng, Mingxi; Sun, I‐Wen

doi:10.1149/1.2828016

Cited by 47 publications

(45 citation statements)

References 30 publications

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“…Several papers on Al (Chang et al, 2007(Chang et al, , 2008(Chang et al, and 2008b and Al-Zn (Pan et al, 2010) electrodeposition from EMIC (1-ethyl-methylimidazolium chloride) has been recently published. In the electrodeposition of aluminium on AZ91D, a solution of AlCl 3 -EMIC (1.5:1) was prepared and handled in a glove box under nitrogen atmosphere, in which the moisture and oxygen content were maintained below 1 ppm.…”

Section: Non-aqueous Electroplatingmentioning

confidence: 99%

“…Before electrodeposition, each sample was ground with SiC paper to 1000 grit. Electrodeposition tests were carried out both at constant potential (-0.2 V and -0.4 V vs Al wire) (Chang et al, 2007) and at constant current density (Chang et al, 2008). The surface and cross-section morphologies of the sample produced at -0.2 V are shown in Fig.…”

Section: Non-aqueous Electroplatingmentioning

confidence: 99%

See 1 more Smart Citation

Electroless and Electrochemical Deposition of Metallic Coatings on Magnesium Alloys Critical Literature Review

Forno¹,

Bestetti²

2011

Magnesium Alloys - Corrosion and Surface Treatments

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Section: Non-aqueous Electroplatingmentioning

confidence: 99%

Section: Non-aqueous Electroplatingmentioning

confidence: 99%

Electroless and Electrochemical Deposition of Metallic Coatings on Magnesium Alloys Critical Literature Review

Forno¹,

Bestetti²

2011

Magnesium Alloys - Corrosion and Surface Treatments

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“…Entre las diferentes opciones disponibles (composición de la aleación, diseño, etc. ), los recubrimientos protectores pueden ser una buena opción para poder resolver este problema [2][3][4][5][6][7][8][9] .…”

Section: Introductionunclassified

Comportamiento a la corrosión electroquímica de aleaciones MgAl con recubrimientos de materiales compuestos Al/SiCp mediante proyección térmica

et al. 2010

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ResumenSe estudia, mediante espectroscopía de impedancia electroquímica en solución 3,5 % NaCl, la protección frente a la corrosión de aleaciones Mg-Al recubiertas por proyección térmica con materiales compuestos Al/SiCp. Se varió la fracción de volumen de las partículas de SiC (SiCp) entre 5 y 30 %. Los recubrimientos efectuados por proyección tér-mica revelan un elevado número de microcanales, en la vecindad de las partículas de SiC, que facilitan la penetración del electrolito originando procesos de corrosión galvánica en los substratos de las aleaciones de magnesio. Un tratamiento posterior mediante la aplicación de una presión en frío reduce el grado de porosidad de los recubrimientos y mejora la unión, tanto entre el substrato y el recubrimiento como entre las partículas de aluminio y SiC, mejorando la resistencia a la corrosión de las aleaciones recubiertas. La efectividad de los recubrimientos disminuye ligeramente con la adición de SiCp cuando se comparan con los mismos recubrimientos de aluminio sin refuerzo. Palabras claveAleaciones de magnesio; Recubrimientos de materiales compuestos; Corrosión; Proyección térmica. Electrochemical corrosion behaviour of Mg-Al alloys with thermal spray Al/SiCp composite coatings AbstractThe corrosion protection of Mg-Al alloys by flame thermal spraying of Al/SiCp composite coatings was evaluated by electrochemical impedance spectroscopy in 3.5 wt.% NaCl solution. The volume fraction of SiC particles (SiCp) varied between 5 and 30%. The as-sprayed Al/SiCp composite coatings revealed a high number of micro-channels, largely in the vicinity of the SiC particles, that facilitated the penetration of the electrolyte and the subsequent galvanic corrosion of the magnesium substrates. The application of a cold-pressing post-treatment reduced the degree of porosity of the coatings and improved the bonding at the coating/substrate and Al/SiC interfaces. This resulted in improved corrosion resistance of the coated specimens. The effectiveness of the coatings slightly decreased with the addition of 5-30 vol.% SiCp compared with the unreinforced thermal spray aluminium coatings.

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“…According to the literature, 24 The complex ion chemistry in the AlCl 3 /TMHC is similar to that for the AlCl 3 /1-ethyl-3-methylimidazolium chloride (AlCl 3 /EMIC) ILs, but the former ILs exhibit higher melting points and higher viscosities than the later ILs do. To our knowledge, galvanostatic deposition of Al from the AlCl 3 /EMIC ILs has been studied, 25,26 but potential oscillation has not been reported. …”

mentioning

confidence: 99%

Potential Oscillation Associated Galvanostatic Deposition of Periodic Al Wires from a Chloroaluminate Ionic Liquid

Sun

2015

ECS Electrochemistry Letters

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Potential oscillation was observed during the template-free galvanostatic deposition in the 58/42 mol% AlCl 3 /trimethylamine hydrochloride ionic liquid, and resulted in the formation of unique periodic (accordion-like) aluminum wires with variable periodicity and diameter controlled by the deposition current density. Factors leading to this phenomenon are postulated. © The Author(s) 2015. Published by ECS. This is an open access article distributed under the terms of the Creative Commons Attribution Non-Commercial No Derivatives 4.0 License (CC BY-NC-ND, http://creativecommons.org/licenses/by-nc-nd/4.0/), which permits non-commercial reuse, distribution, and reproduction in any medium, provided the original work is not changed in any way and is properly cited. For permission for commercial reuse, please email: oa@electrochem.org. [DOI: 10.1149/2.0021507eel] All rights reserved.Manuscript submitted March 19, 2015; revised manuscript received April 27, 2015. Published May 5, 2015 Potential oscillation during galvanostatic electrodeposition and current oscillation during potentiostatic electrodeposition are of interesting because these phenomena often associated with the production of deposits having interesting spatial patterns in the microor nano-scale. Many examples acquired in aqueous systems have been reported including tine metal latticework consist of cuboids connected by needles, 1,2 stacked alternated layers of metals or alloys, [3][4][5] dendrites, 6,7 and metal wires with periodically changed diameters. 8-10Often, the oscillation is associated with negative differential resistance (NDR), 11 and has been attributed to the reactions such as formation of passivation layer, autocatalytic growth, adsorption of additives (levelers and accelerants), and restricted mass transport of ions.Ionic liquids (ILs) have attracted numerous interests in electrochemistry and electrodeposition 12,13 especially for the deposition of materials such as Al 14 that are difficult to obtain from aqueous baths. Materials with various morphologies, specifically, metals/alloys wires, [15][16][17][18][19][20][21] have been electrodeposited from ILs with and without the need of template. Nevertheless, reports on electrochemical oscillation in IL are very limited. 22,23 Schaltin et al. 23 discussed the current oscillation during potentiostatic electrolysis of EMIC IL containing both Cu(II)/Cu(I), and found the presence of both Cu(II) and Cu(I) is essential for the oscillation to occur. Here, we report the potential oscillation during the template-free galvanostatic deposition of Al from a quiescent 58/42 mol% AlCl 3 /trimethylamine hydrochloride (AlCl 3 /TMHC) IL, which leads to the formation of Al wires with diameters change periodically. According to the literature, 24 The complex ion chemistry in the AlCl 3 /TMHC is similar to that for the AlCl 3 /1-ethyl-3-methylimidazolium chloride (AlCl 3 /EMIC) ILs, but the former ILs exhibit higher melting points and higher viscosities than the later ILs do. To our knowledge, galvanostatic de...

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Improved Corrosion Resistance of Magnesium Alloy with a Surface Aluminum Coating Electrodeposited in Ionic Liquid

Cited by 47 publications

References 30 publications

Electroless and Electrochemical Deposition of Metallic Coatings on Magnesium Alloys Critical Literature Review

Electroless and Electrochemical Deposition of Metallic Coatings on Magnesium Alloys Critical Literature Review

Comportamiento a la corrosión electroquímica de aleaciones MgAl con recubrimientos de materiales compuestos Al/SiCp mediante proyección térmica

Potential Oscillation Associated Galvanostatic Deposition of Periodic Al Wires from a Chloroaluminate Ionic Liquid

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