Electrodeposition of Al coating on Mg alloy from Al chloride/1-ethyl-3-methylimidazolium chloride ionic liquids with different Lewis acidity

Chang, Jeng‐Kuei; Sun, I‐Wen; Pan, Szu-Jung; Chuang, M. H.; Deng, Ming-Jay; Tsai, Wen‐Ta

doi:10.1179/174591908x327554

Cited by 23 publications

(10 citation statements)

References 33 publications

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“…The results show that the deposition rate increased with increasing magnitude of cathodic potential. At a total cathodic passed charge of 50 C cm −2 , the thickness of the deposit was approximately 15-18 m. The deposition rate depends not only on the applied potential, but also on the applied current density or AlCl 3 concentration, as reported previously [14][15][16].…”

Section: Resultsmentioning

confidence: 96%

“…As a result, the concentration of Al 2 Cl 7 − decreases with the decrease in acidity. It has been reported [15] that the deposition rate decreases as the acidity of the electrolyte decreases. The relatively low reduction rate observed with the addition of 1 wt% ZnCl 2 was probably attributed to the increase in basicity of the ionic liquid.…”

Section: Resultsmentioning

confidence: 97%

“…1.5 V. Curve (a) in Fig. 1 displays the cyclic voltammogram obtained in 60 m/o AlCl 3 -EMIC without ZnCl 2 addition, in the potential range of −0.5 to 2.5 V. As reported previously [14][15][16], when the AlCl 3 molar ratio exceeds 50%, the following reaction takes place:…”

Section: Methodsmentioning

confidence: 87%

“…A previous study proved that acidic aluminum chloride-1-ethyl-3-methylimidazolium chloride ionic liquids (AlCl 3 -EMIC) can be used as an electrolyte for the electrodeposition of Al on a magnesium alloy surface [14]. Successful Al electrodeposition can be performed in ionic liquids with proper AlCl 3 to EMIC molar ratios [15]. Improved corrosion resistance has been demonstrated in polarization and electrochemical impedance spectroscopy (EIS) studies [16].…”

Section: Introductionmentioning

confidence: 97%

See 3 more Smart Citations

Co-deposition of Al–Zn on AZ91D magnesium alloy in AlCl3–1-ethyl-3-methylimidazolium chloride ionic liquid

Pan

Tsai

Chang

et al. 2010

Electrochimica Acta

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Section: Resultsmentioning

confidence: 96%

Section: Resultsmentioning

confidence: 97%

Section: Methodsmentioning

confidence: 87%

Section: Introductionmentioning

confidence: 97%

See 2 more Smart Citations

Co-deposition of Al–Zn on AZ91D magnesium alloy in AlCl3–1-ethyl-3-methylimidazolium chloride ionic liquid

Pan

Tsai

Chang

et al. 2010

Electrochimica Acta

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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%

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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Ionic Liquid Treatments for Enhanced Corrosion Resistance of Magnesium‐Based Substrates

Petro

Schlesinger

Song³

2010

Modern Electroplating

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SONG INTRODUCTIONMagnesium (Mg) is the eighth most abundant element on earth, possessing several advantageous properties including a high strength to weight ratio and one of the lightest metals with a density that is only two-thirds that of aluminum and one-fourth that of iron at 1.74 g cm À3 . Additional properties that contribute to magnesium's versatility in the automotive, electronic, and aerospace industries include a high thermal conductivity, high dimensional stability, good electromagnetic shielding characteristics, high damping characteristics, good machinability, and easy recyclability [1]. These properties make the utilization of magnesium of particular interest to the automotive and aerospace industries where the weight reduction provides a simple means to achieve higher fuel efficiencies without sacrificing structural strength.Despite its many valuable properties, magnesium remains a very reactive element, prone to a number of undesirable properties, including poor corrosion and wear resistance, poor creep resistance, and high chemical reactivity, which have limited its wider industrial use. As such, automobiles currently possess few magnesium cast parts, averaging only a few pounds per car. Pure magnesium corrodes rapidly in humid atmospheric and/or aqueous environments where anions such as Cl À , Br À , I À , and SO À x promote local and generalized corrosion [2][3][4][5][6][7][8][9][10][11][12]. Compounds like alcohols, ethers, and phenols also attack magnesium [13]. Although alloying magnesium with elements such as manganese, aluminum, zinc, zirconium, and rare earths [14,15] can improve its properties, magnesium and its alloys continue to be extremely susceptible to galvanic corrosion, which can cause severe pitting in the metal, resulting in decreased mechanical stability and an unattractive appearance of the surface. Although uniform attack [16][17][18] is generally the most prevalent form of electrochemical corrosion, occurring with equal intensity over the entire surface of the metal, in the case of magnesium, especially pure magnesium, the partially protective surface film makes localized galvanic [19][20][21][22][23][24] and pitting corrosion [25-35] more common and worrisome, largely due to the difficulty in their detection and suppression. Galvanic corrosion occurs when two metals/alloys having differing compositions, and thus standard electrode potentials, are electrically coupled in the presence of an electrolyte. This coupling results in the formation of a galvanic cell, which preferentially corrodes the more reactive, or electronegative, of the two metals. Since magnesium has a highly negative standard electrode potential (E 0 ¼À2.37 V) there are few metal couples with which serious and rapid corrosion does not occur. Pitting corrosion, defined by the formation of small pits on the surface of a metal/alloy, usually stem from galvanic corrosion of a surface defect and progresses similar to crevice corrosion, where stagnant liquid in a crevice begins oxidizing the metal and/or its pass...

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Electrodeposition of Al coating on Mg alloy from Al chloride/1-ethyl-3-methylimidazolium chloride ionic liquids with different Lewis acidity

Cited by 23 publications

References 33 publications

Co-deposition of Al–Zn on AZ91D magnesium alloy in AlCl3–1-ethyl-3-methylimidazolium chloride ionic liquid

Co-deposition of Al–Zn on AZ91D magnesium alloy in AlCl3–1-ethyl-3-methylimidazolium chloride ionic liquid

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

Ionic Liquid Treatments for Enhanced Corrosion Resistance of Magnesium‐Based Substrates

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