Journal
CORROSION SCIENCE
Volume 139, Issue -, Pages 255-266Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.corsci.2018.04.043
Keywords
Alloy; Copper; EIS; Polarization; Erosion; De-alloying
Funding
- National Basic Research Program of China (973 Program) [2014CB046701]
- National Natural Science Foundation of China [51601114, 51771117]
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Microstructure evolution of the nickel-aluminum bronze alloy was studied by heat treatment, including annealing, normalizing, quenching and aging. The microstructure was refined and homogenized after quenching or quenching/aging at 450 degrees C, which can eliminate selective phase corrosion effectively. Compared with the current production process, static corrosion rate reduced about 50%, due to the rapid formation of a protective film. In addition, cavitation corrosion rate reduced by a factor of 4.9 and 7.9 for the quenched and quenched/aged at 450 degrees C samples, respectively. This can be attributed to the improved hardness and weakened synergy between corrosion and mechanical attack.
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