Corrosion resistance in FSW and in MIG welding techniques of AA6XXX

A comparison of the corrosion resistance of AA6060T5 and AA6082T6 jointed surfaces via Friction Stir Welding (FSW) and Metal Inert Gas (MIG), respectively, is reported. The test was conducted putting the welded and polished samples in an acid salt solution. The corrosion resistance was detected via morphological analysis of the surface. The attack was localized (pitting), an index referred to the pit density was used for the comparison. The result indicated that the joint welded via Friction Stir is more resistant than that welded via Metal Inert Gas technique.