Electroplating of Amorphous Aluminum-Manganese Alloy from Molten Salts.

Abstract

(1993)

Corrosion behaviors of Zn/Al–Mn alloy composite coatings deposited on magnesium alloy AZ31B (Mg–Al–Zn)

“…2 shows the XRD patterns of Mg alloy substrates without and with coatings. The peaks related with Mg and Zn in the diffraction patterns should be aroused from Mg alloy substrate and Zn layer, respectively, while just a broad and diffuse peak was seen in the diffraction pattern of Al-Mn alloy coating, which implies that the Al-Mn alloy coating was amorphous, this observation correspond fairy well to the results of electrodepositing of Al-Mn alloy from molten salts in literatures [16][17][18].…”

“…Despite some relevant works in study of electrodepositing of Al-Mn alloy coatings on steels or copper substrates [16][17][18], but most of them focused on the electroplating process, there was little research has been reported on the corrosion mechanism of the Al-Mn alloy coatings. The aim of the present work was to study the corrosion behavior of electroplated Zn/Al-Mn alloy composite coatings on Mg alloy by polarization curves, electrochemical impedance spectroscopy (EIS) and scanning electrode microscopy (SEM).…”

Electrodeposited Al–Mn alloys with microcrystalline, nanocrystalline, amorphous and nano-quasicrystalline structures

“…Despite the significant number of works conducted on electrodeposited Al-Mn alloys [2][3][4][5][6][7][8][9][10][11][12][13][14], only a few studies have provided detailed characterization of the deposited structure. In 1966, Read and Shores presented transmission electron diffraction patterns of Al-Mn alloys electrodeposited from a chloroaluminate molten salt electrolyte (AlCl 3 -KCl-NaCl-MnCl 2 ), presumably at 200°C [10].…”

“…Interestingly, a great many of these phases can be produced by a single technique, i.e. electrodeposition from acidic chloroaluminate salts [1][2][3][4][5][6][7][8][9][10][11][12][13]. While phases predicted by the equilibrium phase diagram have been electrodeposited in the temperature range of 250-425°C [6,8], non-equilibrium phases, such as the quasicrystalline phases, amorphous phase and supersaturated face-centered cubic (fcc) phase, have been deposited at lower temperatures from 150 to 325°C [3,4,6,7,[9][10][11].…”

Microstructure and mechanical properties of electrodeposited Al1−xMnx/Al1−yMny nanostructured multilayers

“…For example, Uchida et al 21 found Al-Mn alloy composition was almost independent of current density/potential, while others 9,24-26 observed a strong dependence. Stafford 9 found Mn concentration increases with current density while the opposite was observed by Li 24 and Grushko.…”