Anisotropic pitting of single-phase β-Zr alloy and isotropic pitting of α + β double-phase Zr alloy

Pitting corrosion behaviour of Zr-40Ti-5Al–4 V alloys with different phase composition was investigated. Pitting of the single-phase β-Zr alloy is crystallographic and the corrosion pits exhibit different orientation, which is mainly attributed to the favored dissolution kinetics of the {001} plane in body-centered cubic β grains. In contrast, isotropic and circular shaped pitting, due to the evenly distributed α and β phases, was observed in Zr...