Mechanical behavior and corrosion properties of some AA6xxx aluminum alloys in T5 temper

The paper describes the mechanical and corrosion properties of three heat treatable extruded Al-Mg-Si aluminum alloys. The alloys were tested as T5 tempered (air-quenched directly on the press and artificially aged) after processing by the extrusion of semi-continuous cast and homogenized billets. The addition of small amounts of zirconium and manganese in the base AIMgSiO.7 alloy increased the strength, reaching 310 MPa of tensile strength and increased the corrosion rate by 15% in aqueous sodium chloride solution. U radu su opisane mehanicke i korozione osobine tri termicki obradive Al legure tipa Al-Mg-Si koje su namijenjene presovanju. Legure su ispitivane u T5 stanju (kaljene direktno na presi vazduhom i vjestacki starene) u obliku profila presovanih od polukontinuirano livenih i homogenizovanih trupaca. Dodatak malih kolicina cirkonijuma i mangana u os-novu AIMgSi 0.7 leguru uzrokuje povecanje zatezne cvrstoce do 310 MPa uz istovremeno povecanje brzine korozije u rastvoru natrijum hlorida za 15%.