A Cavitation Damage Mitigation Technique for ALBC3 Alloy Using Hydrogen Overvoltage

2014 ◽  
Vol 6 (9) ◽  
pp. 2036-2040
Author(s):  
Seok-Ki Jang ◽  
Jae-Cheul Park ◽  
Jae-Yong Jeong ◽  
Min-Su Han ◽  
Seong-Jong Kim
Keyword(s):  
Cavitation Damage ◽  
Damage Mitigation ◽  
Hydrogen Overvoltage ◽  
Mitigation Technique

scholarly journals An Investigation on the Optimum Corrosion Protection Potential for Minimization of Cavitation Damage Using the Potentiostatic Method in Seawater

2013 ◽  
Vol 19 (S5) ◽  
pp. 73-76
Author(s):  
Seong-Jong Kim ◽  
Seok-Ki Jang ◽  
Jae-Cheul Park
Keyword(s):  
Corrosion Protection ◽  
Electrochemical Corrosion ◽  
Hydrogen Gas ◽  
Dynamic State ◽  
Aluminum Bronze ◽  
Cavitation Damage ◽  
Protection Method ◽  
Hydrogen Overvoltage ◽  
Protection Potential ◽  
The Impact

AbstractIn this study, we replaced the expensive blade material with an aluminum–bronze alloy that has excellent corrosion resistance and cavitation characteristics and developed the corrosion protection method to improve durability using an electrochemical method. The objective of this study was to identify the electrochemical corrosion protection conditions to minimize cavitation damage due to generating hydrogen gas (2H2O + 2e− → 2OH− + H2) by means of hydrogen overvoltage before the impact pressure of the cavity is transferred to the surface. In the constant potential experiment under the cavitation environment, the energy was reflected or cancelled out by collision of the cavities with the hydrogen gas generated by the hydrogen overvoltage. As a result, the optimal corrosion prevention potential in the dynamic state is assumed to be the range of −1.4 to −1.7 V, which is the range at which active polarization took place.

A permanently-acting NEA damage mitigation technique via the Yarkovsky effect

2010 ◽  
Vol 48 (5) ◽  
pp. 430-436 ◽  
Author(s):  
D. C. Hyland ◽  
H. A. Altwaijry ◽  
S. Ge ◽  
R. Margulieux ◽  
J. Doyle ◽  
...  
Keyword(s):  
Damage Mitigation ◽  
Yarkovsky Effect ◽  
Mitigation Technique

scholarly journals Improving sensitivity to low-mass dark matter in LUX using a novel electrode background mitigation technique

2021 ◽  
Vol 104 (1) ◽  
Author(s):  
D. S. Akerib ◽  
S. Alsum ◽  
H. M. Araújo ◽  
X. Bai ◽  
J. Balajthy ◽  
...  
Keyword(s):  
Dark Matter ◽  
Low Mass ◽  
Mitigation Technique

Cavitation damage of materials in liquid nitrogen

1969 ◽  
Vol 4 (1) ◽  
pp. 78-79
Author(s):  
D. N. Bol'shutkin ◽  
Yu. E. Krot
Keyword(s):  
Liquid Nitrogen ◽  
Cavitation Damage

A study of the collapse of arrays of cavities

1988 ◽  
Vol 190 ◽  
pp. 409-425 ◽  
Author(s):  
J. P. Dear ◽  
J. E. Field
Keyword(s):  
Shock Wave ◽  
High Speed ◽  
High Speed Photography ◽  
Cavitation Damage ◽  
Major Mechanism ◽  
Collapse Mechanisms ◽  
Multiple Jets ◽  
Circular Holes ◽  
Schlieren Photography ◽  
Thick Glass

This paper describes a method for examining the collapse of arrays of cavities using high-speed photography and the results show a variety of different collapse mechanisms. A two-dimensional impact geometry is used to enable processes occurring inside the cavities such as jet motion, as well as the movement of the liquid around the cavities, to be observed. The cavity arrangements are produced by first casting water/gelatine sheets and then forming circular holes, or other desired shapes, in the gelatine layer. The gelatine layer is placed between two thick glass blocks and the array of cavities is then collapsed by a shock wave, visualized using schlieren photography and produced from an impacting projectile. A major advantage of the technique is that cavity size, shape, spacing and number can be accurately controlled. Furthermore, the shape of the shock wave and also its orientation relative to the cavities can be varied. The results are compared with proposed interaction mechanisms for the collapse of pairs of cavities, rows of cavities and clusters of cavities. Shocks of kbar (0.1 GPa) strength produced jets of c. 400 m s−1 velocity in millimetre-sized cavities. In closely-spaced cavities multiple jets were observed. With cavity clusters, the collapse proceeded step by step with pressure waves from one collapsed row then collapsing the next row of cavities. With some geometries this leads to pressure amplification. Jet production by the shock collapse of cavities is suggested as a major mechanism for cavitation damage.

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