Journal
CORROSION SCIENCE
Volume 52, Issue 5, Pages 1610-1617Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.corsci.2010.02.026
Keywords
NiAl bronze; Copper; Weight loss; Polarization; Friction-stir processing
Funding
- National Outstanding Young Scientist Foundation [50525103]
- National Basic Research Program of China [2006CB605205]
- National High-tech Research Program [2006AA03Z111]
- Chinese Academy of Sciences
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Friction-stir processing (FSP) was adopted to modify the microstructure of a cast Cu-9Al-4.5Ni-4Fe NiAl bronze alloy (NAB). After FSP, the initial coarse microstructure of the cast NAB was transformed to a fine structure, and the porosity defects were eliminated. The microstructure modification changed the corrosion behavior of the NAB in a 3.5% NaCl solution. In a static immersion corrosion test, the FSP NAB exhibited significantly greater corrosion resistance compared to the cast counterpart. The polarization curve and electrochemical impedance spectroscopic (EIS) results indicated that the FSP NAB showed slightly lower electrochemical corrosion resistance. (C) 2010 Elsevier Ltd. All rights reserved.
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