Aluminum cannot provide continuous cathodic corrosion protection under ambient conditions due to the formation of an insulating oxide layer and therefore it should be alloyed. Binary aluminum alloys with Cr, Zn and Sn from AlCl3/1-ethyl-3-methylimidazolium chloride ([EMIm]Cl) containing CrCl2, ZnCl2…
The electrodeposition of Al from ionic liquids (ILs) has great potential for the replacement of environmentally harmful Cd coatings. However, due to the natural Al2O3 layer that forms on contact with atmospheric oxygen, Al is not suitable for cathodic corrosion protection. Alloying is necessary to impede…
Electroplated chromium is an important industrial coating. Both in the decorative and functional field, research is being carried out to develop trivalent chromium electrolytes. In this work, the interaction between CrIII ions and carboxylic acids (malonic acid, malic acid, oxalic acid and glycolic acid)…
The kinetics of the dissolution and deposition of aluminum from a first generation ionic liquid consisting of AlCl3/1-ethyl-3-methylimidazolium chloride (molar ratio 2:1) was studied. Electrochemical impedance spectroscopy shows that the double layer capacitance and the charge–transfer resistance depend…
The anodic dissolution of aluminum in Lewis acidic ionic liquids consisting of AlCl3 and 1-ethyl-3-methylimidazolium chloride was studied using linear sweep and cyclic voltammetry, an electrochemical quartz crystal
microbalance (EQCM) and chronopotentiometry at ambient temperature. Anodic passivation…
Derzeit werden für die vielfältigen Anforderungen in der Technik immer neue Werkstoffe entwickelt. Zur Sicherung einer gleichbleibenden Qualität ist die Bestimmung von mechanischen Werkstoffkennwerten wie Elastizitätsmodul, Gleitmodul, Querkontraktionszahl, aber auch die Gefügebeurteilung, notwendig.…
Newly developed, as well as „old“ materials have to fulfil requirement profiles for their applications. Material defects, wrong compositions, and wrong material treatment procedures can have severe consequences. Therefore, non-destructive materials testing methods are very important for safety. Nevertheless,…