Korrosionsuntersuchungen an scandiumhaltigen AlZnMgCu-Legierungen

Scandium has a variety of influences on the properties of aluminum alloys. These include grain refinement, recrystallization inhibition, and strength enhancement. Grain refinement is particularly interesting for the highly strong 7xxx alloys (AlZnMgCu) used in the aerospace industry, which are considered non-weldable by melting. By adding small amounts of scandium to the sheet or the welding filler material, these alloys become laser-weldable. But what impact does this have on the already corrosion-prone 7xxx alloys? This dissertation explores this question in detail, first describing the fundamental corrosion properties of two 7xxx alloys, followed by an explanation of the influence of scandium.