Surface morphology, crystal structure and orientation of aluminium coatings electrodeposited on mild steel in ionic liquid

Yue, Guikuan; Lü, Xingmei; Zhu, Yanli; Zhang, Xiangping; Zhang, Suojiang

doi:10.1016/j.cej.2008.11.044

Cited by 66 publications

(44 citation statements)

References 34 publications

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“…13,[17][18][19] However, the Al deposits obtained from these ionic liquids lack metal luster, and do not bright at all. It was reported that almost all of the metal coatings obtained from aqueous solutions containing only the salt of deposited ion are not smooth and not bright.…”

Section: -Methylimidazolium ([Emim]mentioning

confidence: 99%

Electrodeposition of Bright Al Coatings from 1-Butyl-3-Methylimidazolium Chloroaluminate Ionic Liquids with Specific Additives

Wang

Zhang

Chen

et al. 2015

J. Electrochem. Soc.

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The electrodeposition of aluminum (Al) on copper (Cu) substrate was investigated in [Bmim]Cl/AlCl 3 (33.3/66.7 mol%) ionic liquid using three pyridine derivatives, nicotinic acid, methyl nicotinate, and 3-methyl pyridine as additives at 303 K, respectively. It was found that bright Al coatings could be electrodeposited with nicotinic acid and methyl nicotinate as additives. SEM and XRD characterizations revealed that the bright coatings were very smooth, composed of nanocrystalline and with a strong (200) preferential orientation. By contrast, a matte and lusterless Al coating was obtained from the ionic liquid with 3-methyl pyridine. Furthermore, the effect of the three additives was investigated by means of cyclic voltammetry, chronopotentiometry and Raman spectroscopy. It was demonstrated that nicotinic acid and methyl nicotinate could absorb on electrode surface more easily and thus served as very effective brighteners producing highly uniform and smooth Al coatings. However, 3-methyl pyridine had no such effect. Al coatings have attracted wide research interest due to the excellent properties, such as non-toxic, low density and corrosion resistance. Conventionally, Al coatings are prepared by thermal spraying, 1 hot dipping, 2 sputter deposition, 3 vapor deposition 4 and electrodeposition.5 Among them, only the electrodeposition method does not need high temperature and has no damage to substrates. However, Al is an active metal that cannot be electrodeposited from aqueous solutions. Al coatings have been prepared from organic solvents or inorganic molten salts, but the former electrolyte suffers from narrow electrochemical window, low conductivity, strong volatile and easy combustion, while the latter needs high operating temperature, causing large energy consumption, rapid equipment corrosion and high environment pollution. 5,6 In contrast, ionic liquids, as a new medium for electrodeposition, have shown many inherent advantages, such as low vapor pressure, high conductivity and wide electrochemical window. 7 The first ionic liquid used for deposition of Al was the mixture of N-ethylpyridinium bromide and AlCl 3 by Hurley and Wier in 1951.8 Since then, a series of research works have been carried out in this field.9-11 Until now, the chloroaluminate ionic liquids prepared by mixing organic chloride salts with AlCl 3 are more favored. The Lewis acidity of these ionic liquids can be adjusted by varying the molar percentage of AlCl 3 , and Al can only be deposited from the Lewis acidic chloroaluminate ionic liquids in which the molar percentage of AlCl 3 is over 50%. Among the Al-containing species in these ionic liquids, only [Al 2 Cl 7 ]− anion is reducible and responsible for the deposition. The cations of these ionic liquids are mainly alkyl pyridine, alkyl imidazole, and quaternary ammonium.12-16 Among them, the most frequently studied systems are those ionic liquids with alkyl imidazole as cations due to their higher conductivity, lower viscosity, and better stability, in which, 1-ethyl-3-methylimidazo...

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Section: -Methylimidazolium ([Emim]mentioning

confidence: 99%

Electrodeposition of Bright Al Coatings from 1-Butyl-3-Methylimidazolium Chloroaluminate Ionic Liquids with Specific Additives

Wang

Zhang

Chen

et al. 2015

J. Electrochem. Soc.

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“…It was found that the action of such inhibitors depends on the specific interaction between the functional groups and the metal surface, due to the presence of the -C = N-group and electronegative nitrogen in the molecule. Ionic liquids and different types of surfactans base inhibitors are well known to have a high activity in acid medium [42,43] and therefore are used in an oil field to minimize carbon-dioxide-induced corrosion [44,45]. Among many kinds of functionalized ionic liquids ether-functionalized ILs have been investigated intensively, and ether groups have been successfully introduced in to imidazolium cations [46][47][48][49][50][51][52].…”

Section: International Journal Of Corrosionmentioning

confidence: 99%

Inhibition Effect of 1-Butyl-4-Methylpyridinium Tetrafluoroborate on the Corrosion of Copper in Phosphate Solutions

Scendo¹,

Uznanska²

2011

International Journal of Corrosion

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The influence of the concentration of 1-Butyl-4-methylpyridinium tetrafluoroborate (4MBPBF 4 ) as ionic liquid (IL) on the corrosion of copper in 0.5 M PO 3− 4 solutions of pH 2 and 4 was studied. The research involved electrochemical polarization method, and scanning electron microscopy (SEM) technique. The results obtained showed that the inhibition efficiency of corrosion of copper increases with an increase in the concentration of 4MBPBF 4 but decreases with increasing temperature. The thermodynamic functions of corrosion analysis and adsorptive behavior of 4MBPBF 4 were carried out. During the test, the adsorption of the inhibitor on the copper surface in the phosphate solutions was found to obey the Langmuir adsorption isotherm and had a physical mechanism.

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“…ILs have also been employed to prepare a protective aluminium thin layer on carbon steel surface by electroreduction and electrodeposition of 1-butyl-3methyl-imidazolium chloroaluminate (AlCl 3 /[BMIM]Cl) (Caporali et al, 2008, Yue et al, 2009). …”

Section: Ionic Liquids As Corrosion Inhibitorsmentioning

confidence: 99%

Perspectives of Ionic Liquids Applications for Clean Oilfield Technologies

Martínez‐Palou¹,

Sánche²

2011

Ionic Liquids: Theory, Properties, New Approaches

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Surface morphology, crystal structure and orientation of aluminium coatings electrodeposited on mild steel in ionic liquid

Cited by 66 publications

References 34 publications

Electrodeposition of Bright Al Coatings from 1-Butyl-3-Methylimidazolium Chloroaluminate Ionic Liquids with Specific Additives

Electrodeposition of Bright Al Coatings from 1-Butyl-3-Methylimidazolium Chloroaluminate Ionic Liquids with Specific Additives

Inhibition Effect of 1-Butyl-4-Methylpyridinium Tetrafluoroborate on the Corrosion of Copper in Phosphate Solutions

Perspectives of Ionic Liquids Applications for Clean Oilfield Technologies

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