In the course of homogenizing annealing of aluminium alloys being cast continually or semi-continually it appears that chemical
inhomogenity takes off within separate dendritic cells (crystal segregation). It is about a diffusion process that takes place at the
temperature which approaches the liquid temperature of the material. In that process the transition of soluble intermetallic compounds and
eutectic to solid solution occurs and it suppresses crystal segregation significantly [1]. The temperature, homogenization time, the size of
dendritic cells and diffusion length influences homogenizing process. The article explores the optimization of homogenizing process in
terms of its time and homogenizing annealing temperature which influence mechanical properties of AlZn5,5Mg2,5Cu1,5 alloy.
This paper deals with the evaluation of the corrosion resistance of the Al-Si alloys alloyed with the different amount of antimony.
Specifically it goes about the alloy AlSi7Mg0,3 which is antimony alloyed in the concentrations 0; 0,001; 0,005; 0,01 a 0,05 wt. % of
antimony. The introduction of the paper is dedicated to the theory of the aluminium alloys corrosion resistance, testing and evaluation of
the corrosion resistance. The influence of the antimony to the Al-Si alloys properties is described further in the introduction. The
experimental part describes the experimental samples which were prepared for the experiment and further they were exposed to the
loading in the atmospheric conditions for a period of the 3 months. The experimental samples were evaluated macroscopically and
microscopically. The results of the experiment were documented and the conclusions in terms of the antimony impact to the corrosion
resistance of the Al-Si alloy were concluded. There was compared the corrosion resistance of the Al-Si alloy antimony alloyed (with the
different antimony content) with the results of the Al-Si alloy without the alloying after the corrosion load in the atmospheric conditions in
the experiment.