Effects of Additives Containing Cyanopyridine on Electrodeposition of Bright Al Coatings from AlCl3-EMIC Ionic Liquids

The Al coatings were electrodeposited on the Cu substrate from AlCl3-EMIC ionic liquid (AlCl3:EMIC = 2:1 molar ratio) containing three cyanopyridine additives with different positions of the substituent group on the pyridine ring, which were 2-cyanopyrid...

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Autores principales:	Min Zhang, Dong Peng, Feifei Peng, Anwei Huang, Kaiqiang Song, Qingbing He, Changqing Yin, Jinsong Rao, Yuxin Zhang, Haitao Chen, Dalong Cong, Zhongsheng Li
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	bright Al electrodeposition ionic liquids cyanopyridine additives Engineering (General). Civil engineering (General) TA1-2040
Acceso en línea:	https://doaj.org/article/1759aeb61466414187435fd34695aeef
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spelling	oai:doaj.org-article:1759aeb61466414187435fd34695aeef2021-11-25T17:16:48ZEffects of Additives Containing Cyanopyridine on Electrodeposition of Bright Al Coatings from AlCl<sub>3</sub>-EMIC Ionic Liquids10.3390/coatings111113962079-6412https://doaj.org/article/1759aeb61466414187435fd34695aeef2021-11-01T00:00:00Zhttps://www.mdpi.com/2079-6412/11/11/1396https://doaj.org/toc/2079-6412The Al coatings were electrodeposited on the Cu substrate from AlCl<sub>3</sub>-EMIC ionic liquid (AlCl<sub>3</sub>:EMIC = 2:1 molar ratio) containing three cyanopyridine additives with different positions of the substituent group on the pyridine ring, which were 2-cyanopyridine, 3-cyanopyridine, and 4-cyanopyridine. The effects of cyanopyridine additives on the deposition potential, morphology, brightness, and corrosion properties of Al coatings were investigated. It was considered that the deposition potential of Al shifted to more negative overpotentials, the quality of Al coatings was promoted, and the corrosion property was improved by the cyanopyridine additives to a varying degree. Especially in the presence of 4-cyanopyridine, the flattest mirror bright Al coating was obtained, which had the smallest homogeneous nanocrystal grain size and strongest Al (200) crystallographic orientation. The average roughness Ra value was as low as 31 nm compared to that in the absence of cyanopyridine additives, which was 417 nm. Furthermore, the corrosion current density of the bright Al coating was three orders of magnitude lower than the rough Al coating, which resulted from the dense nanocrystal structure.Min ZhangDong PengFeifei PengAnwei HuangKaiqiang SongQingbing HeChangqing YinJinsong RaoYuxin ZhangHaitao ChenDalong CongZhongsheng LiMDPI AGarticlebright Alelectrodepositionionic liquidscyanopyridineadditivesEngineering (General). Civil engineering (General)TA1-2040ENCoatings, Vol 11, Iss 1396, p 1396 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	bright Al electrodeposition ionic liquids cyanopyridine additives Engineering (General). Civil engineering (General) TA1-2040
spellingShingle	bright Al electrodeposition ionic liquids cyanopyridine additives Engineering (General). Civil engineering (General) TA1-2040 Min Zhang Dong Peng Feifei Peng Anwei Huang Kaiqiang Song Qingbing He Changqing Yin Jinsong Rao Yuxin Zhang Haitao Chen Dalong Cong Zhongsheng Li Effects of Additives Containing Cyanopyridine on Electrodeposition of Bright Al Coatings from AlCl<sub>3</sub>-EMIC Ionic Liquids
description	The Al coatings were electrodeposited on the Cu substrate from AlCl<sub>3</sub>-EMIC ionic liquid (AlCl<sub>3</sub>:EMIC = 2:1 molar ratio) containing three cyanopyridine additives with different positions of the substituent group on the pyridine ring, which were 2-cyanopyridine, 3-cyanopyridine, and 4-cyanopyridine. The effects of cyanopyridine additives on the deposition potential, morphology, brightness, and corrosion properties of Al coatings were investigated. It was considered that the deposition potential of Al shifted to more negative overpotentials, the quality of Al coatings was promoted, and the corrosion property was improved by the cyanopyridine additives to a varying degree. Especially in the presence of 4-cyanopyridine, the flattest mirror bright Al coating was obtained, which had the smallest homogeneous nanocrystal grain size and strongest Al (200) crystallographic orientation. The average roughness Ra value was as low as 31 nm compared to that in the absence of cyanopyridine additives, which was 417 nm. Furthermore, the corrosion current density of the bright Al coating was three orders of magnitude lower than the rough Al coating, which resulted from the dense nanocrystal structure.
format	article
author	Min Zhang Dong Peng Feifei Peng Anwei Huang Kaiqiang Song Qingbing He Changqing Yin Jinsong Rao Yuxin Zhang Haitao Chen Dalong Cong Zhongsheng Li
author_facet	Min Zhang Dong Peng Feifei Peng Anwei Huang Kaiqiang Song Qingbing He Changqing Yin Jinsong Rao Yuxin Zhang Haitao Chen Dalong Cong Zhongsheng Li
author_sort	Min Zhang
title	Effects of Additives Containing Cyanopyridine on Electrodeposition of Bright Al Coatings from AlCl<sub>3</sub>-EMIC Ionic Liquids
title_short	Effects of Additives Containing Cyanopyridine on Electrodeposition of Bright Al Coatings from AlCl<sub>3</sub>-EMIC Ionic Liquids
title_full	Effects of Additives Containing Cyanopyridine on Electrodeposition of Bright Al Coatings from AlCl<sub>3</sub>-EMIC Ionic Liquids
title_fullStr	Effects of Additives Containing Cyanopyridine on Electrodeposition of Bright Al Coatings from AlCl<sub>3</sub>-EMIC Ionic Liquids
title_full_unstemmed	Effects of Additives Containing Cyanopyridine on Electrodeposition of Bright Al Coatings from AlCl<sub>3</sub>-EMIC Ionic Liquids
title_sort	effects of additives containing cyanopyridine on electrodeposition of bright al coatings from alcl<sub>3</sub>-emic ionic liquids
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/1759aeb61466414187435fd34695aeef
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Effects of Additives Containing Cyanopyridine on Electrodeposition of Bright Al Coatings from AlCl<sub>3</sub>-EMIC Ionic Liquids

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