Al electroplating on the AZ121 Mg alloy in an EMIC–AlCl3 ionic liquid containing ethylene glycol

摘要

To improve the corrosion resistance of Mg alloys, an Al layer was electrodeposited on the Mg surface from an ionic liquid of 1-ethyl-3-methylimidazolium chloride (EMIC) and aluminum chloride (AlCl3) at 283 K. A smooth surfaced Al electrodeposit can be electroplated in the AlCl3–EMIC ionic liquid by pulse electrolysis at 6.7 Hz and a duty ratio of 0.67. A denser and flatter Al layer was successfully electroplated on AZ121 substrate at the lower temperature of 283 K in an AlCl3–EMIC ionic liquid with 0.1 M ethylene glycol added.