ABSTRACT
In this chapter we consider different aspects of the influence of iron impurity on the structure and properties of commercial aluminum alloys, as well as the problems of refming aluminum from this impurity and the means of neutralizing the harmful effect of iron. Because silicon, as well as iron, belongs to the main impurities in aluminum, the result oftheir combined effect is very often revealed, which makes it difficult to estimate their individual contributions.lron and silicon impurities are necessarily present in aluminum, coming into the latter from raw material (alumina, anodic mass, master alloys). Iron concentration may also be increased as a result of solution of cathode elements and the material of steel fitting and equipment in different manufacturing stages. When wastes of metallurgical and machinebuilding production are used as starting materials, the content of iron in such recycled alloys becomes less controllable; it is determined by the purity of the initial raw material in which steel and cast-iron fractions (attachments) may be present.
