EFFECT OF A SCANDIUM ADDITION ON ANODIZING AlMg ALLOYS

Scandium (Sc) is known to be one of the most effective alloying elements aluminum alloys. The only drawback its high price, but that could change quickly due promising results recent research on extraction. However, data how it affects anodic oxidation are very scarce. In this research, we analyzed a micro-addition Sc AlMg alloy growth mechanism and properties protective aluminium oxide layer depending anodization parameters. For comparison, AA5083 with similar magnesium content was also anodized same anodizing all experiments, sulfuric acid (VI) concentrations 1.72 M or 2.2 at temperatures 21 °C 35 used as electrolyte. Potentiostatic (18 V) galvanostatic (20 mA/cm2) methods were applied. (SED-EDS) show scandium uniformly intercalated in matrix decreases resistivity, which increases rate during potentiostatic pore density diameters anodizing. Moreover, mobility cations through layer, thus accelerating reaction concentrated electrolytes. On other hand, increased cation considerably sensitivity temperature electrolyte, can morphology.