surface mechanical attrition treatment (SMAT). Cyclic potentiodynamic polarization (CPP)
measurements have shown hysteresis's loop area owing to localized attack. Surface
examinations using scanning electron microscopy (SEM), electron dispersive X-ray (EDX), X-
ray diffraction (XRD) and grazing induced X-ray diffraction (GIXRD) have been used to
investigate changes of composition on the surface at different depths. The result of …