Corrosion behavior of extrusion, under-aged, peaked-aged and over-aged WE93 alloys in NaHSO3 solutions

The corrosion behaviors of extrusion, under-aged, peaked-aged and over-aged WE93 alloys in NaHSO3 solutions were investigated by optical microscopy (OM), scanning electron microscopy (SEM) and X-ray diffraction (XRD). The weight loss rates, corrosion morphologies and polarization curves were analyzed. The peak-aged specimen in NaHSO3 salt spray had the highest corrosion rate of 0.9787 mg/cm2/d, while extrusion specimen led to the lowest of 0.2184 mg/cm2/d. The specimens could be arranged in decreasing order of corrosion rates: extrusion

Graphical AbstractWeight loss rates of specimens after exposure in NaHSO3 salt spray for 5 dFigure optionsDownload full-size imageDownload as PowerPoint slide