Electroplated bright aluminium coatings for anticorrosion and decorative purposes

Electrodeposition of Bright Al Coatings from Dimethylsulfone-AlCl3 Baths with the Addition of Tetraethylenepentamine

“…The examination with SEM and XRD confirmed that all the bright coatings obtained in this study shared the same aforementioned characteristics of being composed of fine Al crystals 10-30 nm in size and the (100) preferred orientation. The minimum roughness obtained in this study was 0.024 μm, which is much smaller than the value reported for a bright Al coating electrodeposited from an ionic liquid bath containing 1, 10-phenathroline as a brightener (Ra, ＝ 0.12 μm) 8) , indicating the better leveling ability of TEPA in the DMSO2 based bath. 3 5 Mechanism of forming bright surface In order to obtain better insight into the formation mechanism of the bright, flat surface by TEPA, cathodic polarization curves were measured in the baths with 0, 30, 100 mmol TEPA (Fig.…”

“…In general, the electrodeposition of bright coatings has been achieved by including certain additives, called brighteners, in the bath 18) , but no brightener has been found for the electrodeposition of Al from the DMSO2-AlCl3 baths, except ZrCl4, which yields bright Al-Zr alloy coatings 15) . It has been reported that bright Al coatings can be electrodeposited from ionic liquid baths with the addition of 1, 10-phenanthroline 8) or toluene 3) , 6) . Our preliminary experiments, however, showed that these additives did not work as brighteners in DMSO2-AlCl3 baths; the presence of a very small amount of 1, 10-phenanthroline in the bath strongly hindered the electrodeposition of Al and resulted in uneven deposits, while toluene did not affect the appearance of the Al coatings.…”

Electrodeposition of Aluminum from 1,3-Dimethyl-2-Imidazolidinone/AlCl3 baths

“…Electrodeposition of aluminum (Al) at ambient temperatures has been widely investigated owing to a variety of potential applications that include uses in corrosion-resistant [1,2] and decorative coatings [3], electrorefining processes [4,5], and Al-ion batteries [6].…”

Investigation of Al-Ni Alloys Deposition during Over-discharge Reaction of Na-NiCl2Battery

“…Generally, Al has been considered as a quite interesting coating material because it can effectively protect the metals from corrosion. [8][9][10] Although various techniques have been developed to produce Al alloy coating, it is not easy to produce Al alloy from aqueous electrolyte due to high hydrolysis potential. For this reason, electro-deposition has been studied as an alternative method to form Al alloy successfully.…”