Abstract 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 alloy containing α + β double-phase. In addition, weight loss and electrochemical experiments reveal that the double-phase alloy is more sensitive to pitting than the single-phase alloy.

中文翻译：

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单相β-Zr合金的各向异性点蚀和α+β双相Zr合金的各向同性点蚀

摘要 研究了不同相组成的Zr-40Ti-5Al-4 V合金的点蚀行为。单相β-Zr合金的点蚀是晶体学上的，腐蚀坑表现出不同的取向，这主要归因于体心立方β晶粒中{001}面的有利溶解动力学。相反，由于均匀分布的 α 和 β 相，在含有 α + β 双相的 Zr 合金中观察到各向同性和圆形的点蚀。此外，失重和电化学实验表明，双相合金比单相合金对点蚀更敏感。