In the manufacture of transport, weight reduction through the use of lightweight materials remains a very successful and simple means of improving fuel economy and reducing harmful emissions. Increases in magnesium alloys for automotive applications have driven the substantial increase in magnesium world demand. Casting of magnesium is a very economic process, particularly die-casting, and suitable for mass-volume component production. To increase the use of Mg-component, new products are required, based on new manufacturing (extrusion, sheet) and assembly processes (welding) of hybrid Mg. Unlike magnesium castings, wrought magnesium has historically received considerably less R&D for component applications. The corrosion of magnesium alloys is one of the major problems that limit the use of magnesium alloys for transportation applications. Magnesium alloys show strong susceptibility to localized corrosion in chlorides solutions due to their inhomogeneous microstructure. The existence of intermetallics in the microstructure of magnesium alloys might represent initiation sites for localized corrosion. This is due to the formation of galvanic couples between the intermetallics and the surrounding matrix. The main objective of this research is to investigate the localized corrosion behavior of new magnesium alloys due to different processing.