The effect of impurity inclusions on the pitting corrosion behaviour of beryllium
The effect of impurity inclusions on the pitting corrosion behaviour of beryllium
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DOI：
10.1016/j.corsci.2010.03.024
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发表时间：
2010-08
影响因子：
8.3
通讯作者：
J. S. Punni;M. Cox
中科院分区：
文献类型：
--
作者：
J. S. Punni;M. Cox
用电化学极化方法研究了杂质夹杂物对铍的点蚀行为的影响。使用了三种杂质水平不同的商用铍。这项工作表明，铍的点蚀电位与杂质夹杂物的水平有很强的关系，夹杂物总数量最少的品级最耐点蚀。本工作还揭示了腐蚀坑萌生的首选位置，大多数腐蚀坑发生在金属间化合物Fe/Al/Be夹杂物上，少数腐蚀坑发生在含有元素硅或碳化物的夹杂物上。
An electrochemical polarisation study has been conducted to determine the effect of impurity inclusions on the pitting corrosion behaviour of beryllium. Three grades of commercial beryllium differing in impurity levels were used. This work showed a strong relationship between the pitting potential of the beryllium and the level of impurity inclusions, the grade with the least number of overall inclusions being the most resistant to pitting corrosion. The work also revealed the preferred sites for pit initiation, with most corrosion pits initiating at intermetallic Fe/Al/Be inclusions, and to a smaller extent at inclusion sites containing either elemental silicon or carbides.