OXIDATION KINETICS OF ALUMINUM ALLOY AMg2 WITH GALLIUM IN SOLID STATE

Abstract

Solution of many problems in modern technology involves the use of materials that has a high oxidation resistance. Therefore the study of the oxygen interaction with metals and alloys has acquired great importance in connection with the widespread use of new materials with special physical and chemical properties in various fields of science and technology in recent years. In this series special place is given to alloys of aluminum with magnesium. The thermogravimetric method was used to study the interaction of the AMg2 alloy containing gallium with atmospheric oxygen in the range 773 – 873 K in solid state. The kinetic parameters of the oxidation process are determined. Gallium additives up to 1.0 % increase the oxidation rate, which is accompanied by an increase in the apparent activation energy of theoxidation 
process from 100 to 40 kJ/mol. The alloys oxidation process obeys the parabolic equation.