Study of Corrosion-Electrochemical Behavior of Aluminum-Beryllium Alloys Alloyed with Yttrium, Lanthanum and Cerium

摘要

Advantage of alloys on the basis of system Al-Be,Al-Be-REM is raised technological, physical, chemical and corrosion resistance properties in damp and excessively aggressive atmospheres [1]. According to literary reviews, this alloys basically are foundry-hypoeuthectic and hypereuthectic, and the technology of moulding of these alloys very difficult and demands application of operations modifying. Difficultly deleted impurity basically (Fe), specifically influence phase structure, naturally influencing on physical and chemical properties industrial silumines with the maintenance not less than 0.4-0.5 %. Many additives as Fe, Mg, Ti, Be, especially in hypoeuthectic silumines increasing strength and foundry properties, can reduce them corrosion -resistance. In connection with the above-stated is of interest researches of influence of impurity such elements as, Be and REM on corrosion resistance industrial alumines. Studies corrosion -resistance spent samples potentiostatic a method on device " Potentiostate -P-50" with a registering recorder in the environment of the muriatic solutions in a mode "Potential", he analysis of experimental data have shown, that addition Be, positively modifying structure of foundry alloys, reduces influences containing in it Fe, increases strength and corrosion resistance, which calculations testify experimental data of electrochemical indicators [2,3].