Effects of surface contamination and pre-exposure on the corrosion rate of Mg alloys

Corrosion resistance is one of the key material properties that are assessed in selecting Mg alloys for automotive applications. For a given alloy, its corrosion rate data can vary considerably depending on the method used in the corrosion test and on the sample surface condition involved. In many automotive applications, high-pressure die cast parts are used in as-cast surface conditions. Surface contaminations derived from the manufacturing …