On the Mechanism of the Origin of the Cavitation Effect on Electrochemically Hydrogen-Charged Palladium

被引：2
|
作者：
Lyakhov, B. F. [1 ]
Solodkova, L. N. [1 ]
Anufriev, N. G. [1 ]
Vashchenko, S. V. [1 ]
Bardyshev, I. I. [1 ]
Kotenev, V. A. [1 ]
Tsivadze, A. Yu. [1 ]
机构：
[1] Russian Acad Sci, Frumkin Inst Phys Chem & Electrochem, Moscow 119071, Russia
来源：
PROTECTION OF METALS AND PHYSICAL CHEMISTRY OF SURFACES | 2020年 / 56卷 / 05期
关键词：
Air bubbles - Bulk defects - Cavitation effect - Fine crack - Micro voids;
D O I：
10.1134/S2070205120050196
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
The relationship between the amount of hydrogen electrochemically introduced to Pd and the volume and linear sizes of the formed PdH system, as well as the intensity of cavitation that arises after saturation of Pd with hydrogen, has been determined. The results of the study allows one to describe the mechanism of origin of cavitation on PdH in spite of the impossibility to determine the composition of atmosphere in bulk defects (microvoids, microcracks, and dislocations), which are formed upon hydrogenation of Pd. A Harvey-Knapp model has been employed, which describes well the origin of cavitation on nonwettable surfaces with fine cracks. The model is based on the hypothesis that presence of cavitation cores are present in water in the form of fine air bubbles.
引用
收藏
页码：923 / 928
页数：6
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