TY - GEN
T1 - The effect of UNS C95520 Microstructure on its cavitation erosion behavior in seawater
AU - Al-Hashem, Abdulhameed
AU - Tanoli, Nusrat
N1 - Publisher Copyright:
© 2018 by NACE International.
PY - 2018
Y1 - 2018
N2 - An investigation was carried out to study the effect of the microstructure of nickel-aluminum-bronze alloy (UNS C95520) on its cavitation corrosion behavior in seawater, using a 20-kHz ultrasonic induced cavitation facility. Cavitation tests were made under free corrosion conditions as a function of exposure time in natural seawater for this alloy. Optical and scanning electron microscopy showed that UNS C95520 immersed in stagnant seawater suffered from selective corrosion of the copper-rich α phase at boundaries with intermetallic κ precipitates. The κ precipitates and precipitate-free zones did not suffer corrosion. Cavitation made the surface of this alloy very rough, with large cavities or pits, ductile tearing, and corrosion of the boundaries of the α columnar grains. In addition, the number of cavities and their size have increased with exposure time. Selective phase corrosion and cavitation stresses were considered the causes of the cracks observed.
AB - An investigation was carried out to study the effect of the microstructure of nickel-aluminum-bronze alloy (UNS C95520) on its cavitation corrosion behavior in seawater, using a 20-kHz ultrasonic induced cavitation facility. Cavitation tests were made under free corrosion conditions as a function of exposure time in natural seawater for this alloy. Optical and scanning electron microscopy showed that UNS C95520 immersed in stagnant seawater suffered from selective corrosion of the copper-rich α phase at boundaries with intermetallic κ precipitates. The κ precipitates and precipitate-free zones did not suffer corrosion. Cavitation made the surface of this alloy very rough, with large cavities or pits, ductile tearing, and corrosion of the boundaries of the α columnar grains. In addition, the number of cavities and their size have increased with exposure time. Selective phase corrosion and cavitation stresses were considered the causes of the cracks observed.
KW - Cavitation
KW - Corrosion
KW - Intermetallic
KW - Microstructure
KW - Seawater
UR - https://www.scopus.com/pages/publications/85053517229
M3 - Conference contribution
AN - SCOPUS:85053517229
SN - 9781510864405
T3 - NACE - International Corrosion Conference Series
BT - Corrosion Conference and Expo 2018
PB - National Assoc. of Corrosion Engineers International
T2 - Corrosion Conference and Expo 2018
Y2 - 15 April 2018 through 19 April 2018
ER -