Process for the desensitisation to intercrystalline corrosion of 2000 and 6000 series Al alloys and corresponding products

摘要

An improvement to a process for treating an aluminum alloy for the series AA 2000 or AA 6000 comprising solution heat treating, quenching and natural or artificial aging, in which conventional heat solution heat treating is defined as solution heat treating the alloy at a temperature which is 5° to 10° C. below a known eutectics melting temperature for the alloy. The improvement comprises solution heat treating at a temperature which is 10° to 100° C. below the conventional solution heat treating temperature in order to desensitize the alloy to intercrystalline corrosion.