AlCl<sub>3</sub>-EMIC离子液体电沉积Al-Ti合金及耐蚀性研究

doi:10.11896/cldb.24100244

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Abstract This study focuses on optimizing the electrodeposition process of Al-Ti alloy coatings by regulating Ti content and enhancing corrosion resis-tance for high-performance protective applications. Al-Ti alloy coatings were prepared on a copper substrate using a constant current method, with an electrolyte composed of a 2∶1 molar ratio of AlCl₃ to 1-ethyl-3-methylimidazolium chloride (EMIC) ionic liquid and potassium fluorotita-nate (K₂TiF₆) as the Ti source. By adjusting the current density (10—20 mA/cm²) and electrodeposition time (45—120 min), the effects on the morphology, composition, and corrosion resistance of the coatings were systematically investigated. It was observed that the Ti content in the coatings significantly increases with increasing current density, while the densification of the coatings improves at higher current densities. At a current density of 20 mA/cm² and an electroplating time of 60 min, the Ti content reaches its maximum value of 20.43%. Electrochemical tests showed that the self-corrosion current density decreases significantly from 56.520 μA/cm² to 1.068 μA/cm² with increasing current density. A passivation phenomenon is observed at a current density of 15 mA/cm², characterized by a plateau region in the anodic polarization curve. With increasing electrodeposition time, the charge transfer resistance and film resistance of the coatings increases. At an electroplating time of 90 min, the densification of the coatings is further enhanced, resulting in a slower electrochemical reaction rate and significantly improved protective performance. The coatings prepared at a current density of 15 mA/cm² and an electroplating time of 90 min exhibit optimal corrosion resistance.

Key words： ionic liquid EMIC Al-Ti alloy AlCl₃ corrosion resistance

Published: 25 January 2026 Online: 2026-01-27

CLC number:

TG174

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	Articles by authors
	ZHONG Haixia
	ZHONG Qingdong
	YANG Jian
	ZHANG Shujian
	WANG Xuemei
	FAN Jiabao

Cite this article:

ZHONG Haixia,ZHONG Qingdong,YANG Jian, et al. Study on Electrodeposition of Al-Ti Alloy in AlCl₃-EMIC Ionic Liquid and Its Corrosion Resistance[J]. Materials Reports, 2026, 40(2): 24100244-7.

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https://www.mater-rep.com/EN/10.11896/cldb.24100244 OR https://www.mater-rep.com/EN/Y2026/V40/I2/24100244

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