Corrosion Phenomenon Evaluation of Mg Alloys using Surface Potential Difference Measured by SKPFM

Effects of SnO2 Passive Film and Surface Micro-Galvanic Corrosion on the Corrosion Behavior of as-Extruded Mg-9Li-5Al-xSn Alloys

“…Recently, scanning Kelvin probe force microscopy (SKPFM) was used to obtain the Volta potentials differences between the secondary phase and matrix. [25][26][27][28] The Volta potentials difference can explain the corrosion mechanism of intermetallic compounds such as AlCuMg, Al 2 Nd, Al 2 Gd, Al-Mn and Al 2 Y on alloys. [29][30][31] X-ray photoelectron spectroscopy (XPS) is a relatively mature technique for detecting the components of corrosion products, and is commonly used to identify oxide films, such as Al 2 O 3 , MgCO 3 , Mg(OH) 2 , Nd 2 O 3 on the alloy surfaces.…”