Effect of structural relaxation on electrochemical corrosion behaviour of amorphous alloys

摘要

The effect of thermally induced changes in the structure of amorphous alloys on their physical and chemical properties is of considerable interest for the theory and practical application of these materials. It is known [I] that the structural relaxation of these alloys during subsequent annealing below the crystallization temperature affects their physical properties. Also, it has been pointed out that the structural relaxation may lead to an increase of the corrosion resistance of amorphous alloys, however, the data on this effect are still very scarce [2-4], Vasilyev and co-workers [2,3] have suggested that the observed lower dissolution rate of amorphous Fe7oCrioPi3C7 and TifisCujoPs alloys after low-temperature annealing may be due to a redistribution of the chemical elements on the surface and a decrease of the residual stresses.